diff --git a/.github/renovate.json5 b/.github/renovate.json5
index dd64e6620..73b666158 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -29,6 +29,18 @@
       matchManagers: ["pre-commit"],
       description: "Weekly update of pre-commit dependencies",
     },
+    {
+      groupName: "Rust dev-dependencies",
+      matchManagers: ["cargo"],
+      matchDepTypes: ["devDependencies"],
+      description: "Weekly update of Rust development dependencies",
+    },
+    {
+      groupName: "pyo3",
+      matchManagers: ["cargo"],
+      matchPackagePatterns: ["pyo3"],
+      description: "Weekly update of pyo3 dependencies",
+    },
   ],
   vulnerabilityAlerts: {
     commitMessageSuffix: "",
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 760b71e31..c4e0e628c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -72,33 +72,23 @@ jobs:
     name: "cargo test | ${{ matrix.os }}"
     steps:
       - uses: actions/checkout@v4
-
-      - if: ${{ matrix.os == 'macos' }}
-        name: "Install bootstrap dependencies"
-        run: brew install coreutils
-
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-
-      - name: "Install required Python versions"
-        run: |
-          python -m pip install "zstandard==0.22.0"
-          python scripts/bootstrap/install.py
-
       - name: "Install Rust toolchain"
         run: rustup show
 
-      - name: "Install cargo nextest"
-        uses: taiki-e/install-action@v2
-        with:
-          tool: cargo-nextest
-
       - if: ${{ matrix.os != 'windows' }}
         uses: rui314/setup-mold@v1
 
       - uses: Swatinem/rust-cache@v2
 
+      - name: "Install required Python versions"
+        run: |
+          cargo run -p uv-dev -- fetch-python
+
+      - name: "Install cargo nextest"
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-nextest
+
       - name: "Cargo test"
         run: |
           cargo nextest run --workspace --status-level skip --failure-output immediate-final --no-fail-fast -j 12 --final-status-level slow
@@ -224,6 +214,42 @@ jobs:
           path: ./target/debug/uv.exe
           retention-days: 1
 
+  ecosystem-test:
+    needs: build-binary-linux
+    name: "ecosystem test | ${{ matrix.repo }}"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - repo: "prefecthq/prefect"
+            command: "uv pip install -e '.[dev]'"
+            python: "3.9"
+          - repo: "pallets/flask"
+            command: "uv pip install -r requirements/dev.txt"
+            python: "3.12"
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: ${{ matrix.repo }}
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: "Download binary"
+        uses: actions/download-artifact@v4
+        with:
+          name: uv-linux-${{ github.sha }}
+
+      - name: "Prepare binary"
+        run: chmod +x ./uv
+
+      - name: "Test"
+        run: |
+          ./uv venv
+          ./${{ matrix.command }}
+
   cache-test-ubuntu:
     needs: build-binary-linux
     name: "check cache | ubuntu"
@@ -274,12 +300,12 @@ jobs:
     needs: build-binary-linux
     name: "check system | python on debian"
     runs-on: ubuntu-latest
-    container: debian:bullseye
+    container: debian:bookworm
     steps:
       - uses: actions/checkout@v4
 
       - name: "Install Python"
-        run: apt-get update && apt-get install -y python3.9 python3-pip python3.9-venv
+        run: apt-get update && apt-get install -y python3.11 python3-pip python3.11-venv
 
       - name: "Download binary"
         uses: actions/download-artifact@v4
@@ -290,16 +316,16 @@ jobs:
         run: chmod +x ./uv
 
       - name: "Print Python path"
-        run: echo $(which python3.9)
+        run: echo $(which python3.11)
 
       - name: "Validate global Python install"
-        run: python3.9 scripts/check_system_python.py --uv ./uv
+        run: python3.11 scripts/check_system_python.py --uv ./uv --externally-managed
 
   system-test-fedora:
     needs: build-binary-linux
     name: "check system | python on fedora"
     runs-on: ubuntu-latest
-    container: fedora:39
+    container: fedora:41
     steps:
       - uses: actions/checkout@v4
 
@@ -346,6 +372,8 @@ jobs:
         run: python scripts/check_system_python.py --uv ./uv
 
   system-test-centos:
+    # https://github.com/astral-sh/uv/issues/2915
+    if: false
     needs: build-binary-linux
     name: "check system | python on centos"
     runs-on: ubuntu-latest
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d965279d2..289b7a1c4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -65,7 +65,7 @@ jobs:
         # we specify bash to get pipefail; it guards against the `curl` command
         # failing. otherwise `sh` won't catch that `curl` returned non-0
         shell: bash
-        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0-prerelease.3/cargo-dist-installer.sh | sh"
+        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0/cargo-dist-installer.sh | sh"
       # sure would be cool if github gave us proper conditionals...
       # so here's a doubly-nested ternary-via-truthiness to try to provide the best possible
       # functionality based on whether this is a pull_request, and whether it's from a fork.
@@ -107,7 +107,7 @@ jobs:
           submodules: recursive
       - name: Install cargo-dist
         shell: bash
-        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0-prerelease.3/cargo-dist-installer.sh | sh"
+        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0/cargo-dist-installer.sh | sh"
       # Get all the local artifacts for the global tasks to use (for e.g. checksums)
       - name: Fetch local artifacts
         uses: actions/download-artifact@v4
@@ -151,7 +151,7 @@ jobs:
         with:
           submodules: recursive
       - name: Install cargo-dist
-        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0-prerelease.3/cargo-dist-installer.sh | sh"
+        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.13.0/cargo-dist-installer.sh | sh"
       # Fetch artifacts from scratch-storage
       - name: Fetch artifacts
         uses: actions/download-artifact@v4
diff --git a/.gitignore b/.gitignore
index b195ac35c..1a106a64e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,7 @@ target/
 target-alpine/
 
 # Bootstrapped Python versions
-bin/
+/bin/
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index abd3eb80d..21d863457 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,7 +12,7 @@ repos:
       - id: validate-pyproject
 
   - repo: https://github.com/crate-ci/typos
-    rev: v1.18.2
+    rev: v1.20.4
     hooks:
       - id: typos
 
@@ -32,7 +32,7 @@ repos:
         types_or: [yaml, json5]
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.2.1
+    rev: v0.3.5
     hooks:
       - id: ruff-format
       - id: ruff
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d902a336..eba387b78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,54 @@
 # Changelog
 
+## 0.1.31
+
+### Bug fixes
+
+- Ignore direct URL distributions in prefetcher ([#2943](https://github.com/astral-sh/uv/pull/2943))
+
+## 0.1.30
+
+### Enhancements
+
+- Show resolution diagnostics after `pip install` ([#2829](https://github.com/astral-sh/uv/pull/2829))
+
+### Performance
+
+- Speed up cold-cache `urllib3`-`boto3`-`botocore` performance with batched prefetching ([#2452](https://github.com/astral-sh/uv/pull/2452))
+
+### Bug fixes
+
+- Backtrack on distributions with invalid metadata ([#2834](https://github.com/astral-sh/uv/pull/2834))
+- Include LICENSE files in source distribution ([#2855](https://github.com/astral-sh/uv/pull/2855))
+- Respect `--no-build` and `--no-binary` in `--find-links` ([#2826](https://github.com/astral-sh/uv/pull/2826))
+- Respect cached local `--find-links` in install plan ([#2907](https://github.com/astral-sh/uv/pull/2907))
+- Avoid panic with multiple confirmation handlers ([#2903](https://github.com/astral-sh/uv/pull/2903))
+- Use scheme parsing to determine absolute vs. relative URLs ([#2904](https://github.com/astral-sh/uv/pull/2904))
+- Remove additional 'because' in resolution failure messages ([#2849](https://github.com/astral-sh/uv/pull/2849))
+- Use `miette` when printing `pip sync` resolution failures ([#2848](https://github.com/astral-sh/uv/pull/2848))
+
+## 0.1.29
+
+### Enhancements
+
+- Allow conflicting Git URLs that refer to the same commit SHA ([#2769](https://github.com/astral-sh/uv/pull/2769))
+- Allow package lookups across multiple indexes via explicit opt-in (`--index-strategy unsafe-any-match`) ([#2815](https://github.com/astral-sh/uv/pull/2815))
+- Allow no-op `--no-compile` flag on CLI ([#2816](https://github.com/astral-sh/uv/pull/2816))
+- Upgrade `rs-async-zip` to support data descriptors ([#2809](https://github.com/astral-sh/uv/pull/2809))
+
+### Bug fixes
+
+- Avoid unused extras check in `pip install` for source trees ([#2811](https://github.com/astral-sh/uv/pull/2811))
+- Deduplicate editables during install commands ([#2820](https://github.com/astral-sh/uv/pull/2820))
+- Fix windows lock race: lock exclusive after all try lock errors ([#2800](https://github.com/astral-sh/uv/pull/2800))
+- Preserve `.git` suffixes and casing in Git dependencies ([#2789](https://github.com/astral-sh/uv/pull/2789))
+- Respect Git tags and branches that look like short commits ([#2795](https://github.com/astral-sh/uv/pull/2795))
+- Enable virtualenv creation on Windows with cpython-x86 ([#2707](https://github.com/astral-sh/uv/pull/2707))
+
+### Documentation
+
+- Document that uv is safe to run concurrently ([#2818](https://github.com/astral-sh/uv/pull/2818))
+
 ## 0.1.28
 
 ### Enhancements
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d620e22e5..9341a3972 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,12 +22,6 @@ CMake may be installed with Homebrew:
 brew install cmake
 ```
 
-The Python bootstrapping script requires `coreutils` and `zstd`; we recommend installing them with Homebrew:
-
-```shell
-brew install coreutils zstd
-```
-
 See the [Python](#python) section for instructions on installing the Python versions.
 
 ### Windows
@@ -45,13 +39,13 @@ Testing uv requires multiple specific Python versions. You can install them into
 `<project root>/bin` via our bootstrapping script:
 
 ```shell
-pipx run scripts/bootstrap/install.py
+cargo run -p uv-dev -- fetch-python
 ```
 
-Alternatively, you can install `zstandard` from PyPI, then run:
+You may need to add the versions to your `PATH`:
 
 ```shell
-python3.12 scripts/bootstrap/install.py
+source .env
 ```
 
 You can configure the bootstrapping directory with `UV_BOOTSTRAP_DIR`.
diff --git a/Cargo.lock b/Cargo.lock
index b8cba8cb4..6a58eb025 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -30,9 +30,9 @@ dependencies = [
 
 [[package]]
 name = "aho-corasick"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
 dependencies = [
  "memchr",
 ]
@@ -123,15 +123,15 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.81"
+version = "1.0.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0952808a6c2afd1aa8947271f3a60f1a6763c7b912d210184c5149b5cf147247"
+checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
 
 [[package]]
 name = "arc-swap"
-version = "1.7.0"
+version = "1.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b3d0060af21e8d11a926981cc00c6c1541aa91dd64b9f881985c3da1094425f"
+checksum = "69f7f8c3906b62b754cd5326047894316021dcfe5a194c8ea52bdd94934a3457"
 
 [[package]]
 name = "arrayref"
@@ -200,9 +200,9 @@ dependencies = [
 
 [[package]]
 name = "async-compression"
-version = "0.4.6"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a116f46a969224200a0a97f29cfd4c50e7534e4b4826bd23ea2c3c533039c82c"
+checksum = "07dbbf24db18d609b1462965249abdf49129ccad073ec257da372adc83259c60"
 dependencies = [
  "brotli",
  "flate2",
@@ -211,6 +211,8 @@ dependencies = [
  "memchr",
  "pin-project-lite",
  "tokio",
+ "zstd",
+ "zstd-safe",
 ]
 
 [[package]]
@@ -221,14 +223,14 @@ checksum = "a507401cad91ec6a857ed5513a2073c82a9b9048762b885bb98655b306964681"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
 name = "async_http_range_reader"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf8eeab30c68da4dc2c51f3afc4327ab06fe0f3f028ca423f7ca398c7ed8c5e7"
+checksum = "8561e6613f8361df8bed11c0eef05b98384643bc81f6b753eec7c1d91f097509"
 dependencies = [
  "bisection",
  "futures",
@@ -246,8 +248,8 @@ dependencies = [
 
 [[package]]
 name = "async_zip"
-version = "0.0.16"
-source = "git+https://github.com/charliermarsh/rs-async-zip?rev=d76801da0943de985254fc6255c0e476b57c5836#d76801da0943de985254fc6255c0e476b57c5836"
+version = "0.0.17"
+source = "git+https://github.com/charliermarsh/rs-async-zip?rev=1dcb40cfe1bf5325a6fd4bfcf9894db40241f585#1dcb40cfe1bf5325a6fd4bfcf9894db40241f585"
 dependencies = [
  "async-compression",
  "crc32fast",
@@ -260,15 +262,15 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
 
 [[package]]
 name = "axoasset"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dce2f189800bafe8322ef3a4d361ee7373bfc2f8fe052afda404230166dc45f"
+checksum = "5e05853b0d9abfab8e7532cad0d07ec396dd95c1a81926b49ab3cfa121a9d8d6"
 dependencies = [
  "camino",
  "image",
@@ -293,13 +295,25 @@ dependencies = [
 ]
 
 [[package]]
-name = "axoupdater"
-version = "0.3.3"
+name = "axotag"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e18b628756d7e73bcd3b7330e5834a44f841b115e92bad8563c3dc616a64131"
+checksum = "d888fac0b73e64cbdf36a743fc5a25af5ae955c357535cb420b389bf1e1a6c54"
+dependencies = [
+ "miette",
+ "semver",
+ "thiserror",
+]
+
+[[package]]
+name = "axoupdater"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2245976a147040f18b5b02ecb72b8705efa60f75225e32f51dd717cd5f9d79d1"
 dependencies = [
  "axoasset",
  "axoprocess",
+ "axotag",
  "camino",
  "homedir",
  "miette",
@@ -326,9 +340,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace"
-version = "0.3.69"
+version = "0.3.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
+checksum = "26b05800d2e817c8b3b4b54abd461726265fa9789ae34330622f2db9ee696f9d"
 dependencies = [
  "addr2line",
  "cc",
@@ -360,6 +374,12 @@ version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
+[[package]]
+name = "base64"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9475866fec1451be56a3c2400fd081ff546538961565ccb5b7142cbd22bc7a51"
+
 [[package]]
 name = "bench"
 version = "0.0.0"
@@ -383,9 +403,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.4.2"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed570934406eb16438a4e976b1b4500774099c13b8cb96eec99f620f05090ddf"
+checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
 
 [[package]]
 name = "bitvec"
@@ -410,9 +430,9 @@ dependencies = [
 
 [[package]]
 name = "brotli"
-version = "3.4.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "516074a47ef4bce09577a3b379392300159ce5b1ba2e501ff1c819950066100f"
+checksum = "125740193d7fee5cc63ab9e16c2fdc4e07c74ba755cc53b327d6ea029e9fc569"
 dependencies = [
  "alloc-no-stdlib",
  "alloc-stdlib",
@@ -421,9 +441,9 @@ dependencies = [
 
 [[package]]
 name = "brotli-decompressor"
-version = "2.5.1"
+version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e2e4afe60d7dd600fdd3de8d0f08c2b7ec039712e3b6137ff98b7004e82de4f"
+checksum = "65622a320492e09b5e0ac436b14c54ff68199bac392d0e89a6832c4518eea525"
 dependencies = [
  "alloc-no-stdlib",
  "alloc-stdlib",
@@ -442,9 +462,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.15.4"
+version = "3.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ff69b9dd49fd426c69a0db9fc04dd934cdb6645ff000864d98f7e2af8830eaa"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "bytecheck"
@@ -470,9 +490,9 @@ dependencies = [
 
 [[package]]
 name = "bytemuck"
-version = "1.14.3"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2ef034f05691a48569bd920a96c81b9d91bbad1ab5ac7c4616c1f6ef36cb79f"
+checksum = "5d6d68c57235a3a081186990eca2867354726650f42f7516ca50c28d6281fd15"
 
 [[package]]
 name = "byteorder"
@@ -482,9 +502,9 @@ checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "bytes"
-version = "1.5.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
+checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
 
 [[package]]
 name = "cache-key"
@@ -544,9 +564,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
 [[package]]
 name = "cc"
-version = "1.0.90"
+version = "1.0.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
+checksum = "2678b2e3449475e95b0aa6f9b506a28e61b3dc8996592b983695e8ebb58a8b41"
 dependencies = [
  "jobserver",
  "libc",
@@ -640,9 +660,9 @@ dependencies = [
 
 [[package]]
 name = "clap_complete"
-version = "4.5.1"
+version = "4.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "885e4d7d5af40bfb99ae6f9433e292feac98d452dcb3ec3d25dfe7552b77da8c"
+checksum = "dd79504325bf38b10165b02e89b4347300f855f273c4cb30c4a3209e6583275e"
 dependencies = [
  "clap",
 ]
@@ -688,7 +708,7 @@ dependencies = [
  "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -1045,9 +1065,9 @@ checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
 
 [[package]]
 name = "encoding_rs"
-version = "0.8.33"
+version = "0.8.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7268b386296a025e474d5140678f75d6de9493ae55a5d709eeb9dd08149945e1"
+checksum = "b45de904aa0b010bce2ab45264d0631681847fa7b6f2eaa7dab7619943bc4f59"
 dependencies = [
  "cfg-if",
 ]
@@ -1079,9 +1099,9 @@ dependencies = [
 
 [[package]]
 name = "event-listener"
-version = "5.2.0"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b5fb89194fa3cad959b833185b3063ba881dbfc7030680b314250779fb4cc91"
+checksum = "6d9944b8ca13534cdfb2800775f8dd4902ff3fc75a50101466decadfdf322a24"
 dependencies = [
  "concurrent-queue",
  "parking",
@@ -1090,9 +1110,9 @@ dependencies = [
 
 [[package]]
 name = "event-listener-strategy"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "feedafcaa9b749175d5ac357452a9d41ea2911da598fde46ce1fe02c37751291"
+checksum = "332f51cb23d20b0de8458b86580878211da09bcd4503cb579c225b3d124cabb3"
 dependencies = [
  "event-listener",
  "pin-project-lite",
@@ -1100,9 +1120,9 @@ dependencies = [
 
 [[package]]
 name = "fastrand"
-version = "2.0.1"
+version = "2.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
+checksum = "658bd65b1cf4c852a3cc96f18a8ce7b5640f6b703f905c7d74532294c2a63984"
 
 [[package]]
 name = "fdeflate"
@@ -1263,9 +1283,9 @@ checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
 
 [[package]]
 name = "futures-lite"
-version = "2.2.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "445ba825b27408685aaecefd65178908c36c6e96aaf6d8599419d46e624192ba"
+checksum = "52527eb5074e35e9339c6b4e8d12600c7128b68fb25dcb9fa9dec18f7c25f3a5"
 dependencies = [
  "fastrand",
  "futures-core",
@@ -1282,7 +1302,7 @@ checksum = "87750cf4b7a4c0625b1529e4c543c2182106e4dedc60a2a6455e00d212c489ac"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -1327,9 +1347,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.12"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
+checksum = "94b22e06ecb0110981051723910cbf0b5f5e09a2062dd7663334ee79a9d1286c"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -1356,11 +1376,11 @@ checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
 
 [[package]]
 name = "git2"
-version = "0.18.2"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b3ba52851e73b46a4c3df1d89343741112003f0f6f13beb0dfac9e457c3fdcd"
+checksum = "232e6a7bfe35766bf715e55a88b39a700596c0ccfd88cd3680b4cdb40d66ef70"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 2.5.0",
  "libc",
  "libgit2-sys",
  "log",
@@ -1385,7 +1405,7 @@ dependencies = [
  "bstr",
  "log",
  "regex-automata 0.4.6",
- "regex-syntax 0.8.2",
+ "regex-syntax 0.8.3",
 ]
 
 [[package]]
@@ -1394,42 +1414,23 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bf760ebf69878d9fd8f110c89703d90ce35095324d1f1edcb595c63945ee757"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 2.5.0",
  "ignore",
  "walkdir",
 ]
 
 [[package]]
 name = "h2"
-version = "0.3.24"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb2c4422095b67ee78da96fbb51a4cc413b3b25883c7717ff7ca1ab31022c9c9"
+checksum = "816ec7294445779408f36fe57bc5b7fc1cf59664059096c65f905c1c61f58069"
 dependencies = [
  "bytes",
  "fnv",
  "futures-core",
  "futures-sink",
  "futures-util",
- "http 0.2.12",
- "indexmap",
- "slab",
- "tokio",
- "tokio-util",
- "tracing",
-]
-
-[[package]]
-name = "h2"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31d030e59af851932b72ceebadf4a2b5986dba4c3b99dd2493f8273a0f151943"
-dependencies = [
- "bytes",
- "fnv",
- "futures-core",
- "futures-sink",
- "futures-util",
- "http 1.1.0",
+ "http",
  "indexmap",
  "slab",
  "tokio",
@@ -1439,9 +1440,9 @@ dependencies = [
 
 [[package]]
 name = "half"
-version = "2.4.0"
+version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5eceaaeec696539ddaf7b333340f1af35a5aa87ae3e4f3ead0532f72affab2e"
+checksum = "6dd08c532ae367adf81c312a4580bc67f1d0fe8bc9c460520283f4c0ff277888"
 dependencies = [
  "cfg-if",
  "crunchy",
@@ -1527,17 +1528,6 @@ dependencies = [
  "utf8-width",
 ]
 
-[[package]]
-name = "http"
-version = "0.2.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "601cbb57e577e2f5ef5be8e7b83f0f63994f25aa94d673e54a92d5c516d101f1"
-dependencies = [
- "bytes",
- "fnv",
- "itoa",
-]
-
 [[package]]
 name = "http"
 version = "1.1.0"
@@ -1549,17 +1539,6 @@ dependencies = [
  "itoa",
 ]
 
-[[package]]
-name = "http-body"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ceab25649e9960c0311ea418d17bee82c0dcec1bd053b5f9a66e265a693bed2"
-dependencies = [
- "bytes",
- "http 0.2.12",
- "pin-project-lite",
-]
-
 [[package]]
 name = "http-body"
 version = "1.0.0"
@@ -1567,7 +1546,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1cac85db508abc24a2e48553ba12a996e87244a0395ce011e62b37158745d643"
 dependencies = [
  "bytes",
- "http 1.1.0",
+ "http",
 ]
 
 [[package]]
@@ -1578,8 +1557,8 @@ checksum = "0475f8b2ac86659c21b64320d5d653f9efe42acd2a4e560073ec61a155a34f1d"
 dependencies = [
  "bytes",
  "futures-core",
- "http 1.1.0",
- "http-body 1.0.0",
+ "http",
+ "http-body",
  "pin-project-lite",
 ]
 
@@ -1601,30 +1580,6 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
-[[package]]
-name = "hyper"
-version = "0.14.28"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf96e135eb83a2a8ddf766e426a841d8ddd7449d5f00d34ea02b41d2f19eef80"
-dependencies = [
- "bytes",
- "futures-channel",
- "futures-core",
- "futures-util",
- "h2 0.3.24",
- "http 0.2.12",
- "http-body 0.4.6",
- "httparse",
- "httpdate",
- "itoa",
- "pin-project-lite",
- "socket2",
- "tokio",
- "tower-service",
- "tracing",
- "want",
-]
-
 [[package]]
 name = "hyper"
 version = "1.2.0"
@@ -1634,9 +1589,9 @@ dependencies = [
  "bytes",
  "futures-channel",
  "futures-util",
- "h2 0.4.2",
- "http 1.1.0",
- "http-body 1.0.0",
+ "h2",
+ "http",
+ "http-body",
  "httparse",
  "httpdate",
  "itoa",
@@ -1648,16 +1603,19 @@ dependencies = [
 
 [[package]]
 name = "hyper-rustls"
-version = "0.24.2"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec3efd23720e2049821a693cbc7e65ea87c72f1c58ff2f9522ff332b1491e590"
+checksum = "a0bea761b46ae2b24eb4aef630d8d1c398157b6fc29e6350ecf090a0b70c952c"
 dependencies = [
  "futures-util",
- "http 0.2.12",
- "hyper 0.14.28",
+ "http",
+ "hyper",
+ "hyper-util",
  "rustls",
+ "rustls-pki-types",
  "tokio",
  "tokio-rustls",
+ "tower-service",
 ]
 
 [[package]]
@@ -1667,13 +1625,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca38ef113da30126bbff9cd1705f9273e15d45498615d138b0c20279ac7a76aa"
 dependencies = [
  "bytes",
+ "futures-channel",
  "futures-util",
- "http 1.1.0",
- "http-body 1.0.0",
- "hyper 1.2.0",
+ "http",
+ "http-body",
+ "hyper",
  "pin-project-lite",
  "socket2",
  "tokio",
+ "tower",
+ "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -1745,9 +1707,9 @@ checksum = "b72ad49b554c1728b1e83254a1b1565aea4161e28dabbfa171fc15fe62299caf"
 
 [[package]]
 name = "indexmap"
-version = "2.2.5"
+version = "2.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b0b929d511467233429c45a44ac1dcaa21ba0f5ba11e4879e6ed28ddb4f9df4"
+checksum = "168fb715dda47215e360912c096649d23d58bf392ac62f73919e831745e40f26"
 dependencies = [
  "equivalent",
  "hashbrown 0.14.3",
@@ -1770,23 +1732,24 @@ dependencies = [
 
 [[package]]
 name = "indoc"
-version = "2.0.4"
+version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e186cfbae8084e513daff4240b4797e342f988cecda4fb6c939150f96315fd8"
+checksum = "b248f5224d1d606005e02c97f5aa4e88eeb230488bcc03bc9ca4d7991399f2b5"
 
 [[package]]
 name = "insta"
-version = "1.36.1"
+version = "1.38.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a7c22c4d34ef4788c351e971c52bfdfe7ea2766f8c5466bc175dd46e52ac22e"
+checksum = "3eab73f58e59ca6526037208f0e98851159ec1633cf17b6cd2e1f2c3fd5d53cc"
 dependencies = [
  "console",
  "lazy_static",
  "linked-hash-map",
+ "pest",
+ "pest_derive",
  "regex",
  "serde",
  "similar",
- "yaml-rust",
 ]
 
 [[package]]
@@ -1877,9 +1840,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
+checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "jobserver"
@@ -1971,13 +1934,12 @@ dependencies = [
 
 [[package]]
 name = "libredox"
-version = "0.0.1"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85c833ca1e66078851dba29046874e38f08b2c883700aa29a03ddd3b23814ee8"
+checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 2.5.0",
  "libc",
- "redox_syscall 0.4.1",
 ]
 
 [[package]]
@@ -2006,9 +1968,9 @@ dependencies = [
 
 [[package]]
 name = "libz-sys"
-version = "1.1.15"
+version = "1.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "037731f5d3aaa87a5675e895b63ddff1a87624bc29f77004ea829809654e48f6"
+checksum = "5e143b5e666b2695d28f6bca6497720813f699c9602dd7f5cac91008b8ada7f9"
 dependencies = [
  "cc",
  "libc",
@@ -2065,10 +2027,20 @@ dependencies = [
 ]
 
 [[package]]
-name = "memchr"
-version = "2.7.1"
+name = "md-5"
+version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
+dependencies = [
+ "cfg-if",
+ "digest",
+]
+
+[[package]]
+name = "memchr"
+version = "2.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
 
 [[package]]
 name = "memmap2"
@@ -2099,9 +2071,9 @@ dependencies = [
 
 [[package]]
 name = "memoffset"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
 dependencies = [
  "autocfg",
 ]
@@ -2134,7 +2106,7 @@ checksum = "dcf09caffaac8068c346b6df2a7fc27a177fd20b39421a39ce0a211bde679a6c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -2152,16 +2124,6 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
-[[package]]
-name = "mime_guess"
-version = "2.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4192263c238a5f0d0c6bfd21f336a313a4ce1c450542449ca191bb657b4642ef"
-dependencies = [
- "mime",
- "unicase",
-]
-
 [[package]]
 name = "miniz_oxide"
 version = "0.7.2"
@@ -2220,7 +2182,7 @@ version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab2156c4fce2f8df6c499cc1c763e4394b7482525bf2a9701c9d79d215f519e4"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 2.5.0",
  "cfg-if",
  "cfg_aliases",
  "libc",
@@ -2322,9 +2284,9 @@ dependencies = [
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.101"
+version = "0.9.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dda2b0f344e78efc2facf7d195d098df0dd72151b26ab98da807afc26c198dff"
+checksum = "c597637d56fbc83893a35eb0dd04b2b8e7a50c91e64e9493e398b5df4fb45fa2"
 dependencies = [
  "cc",
  "libc",
@@ -2339,16 +2301,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
-[[package]]
-name = "os_info"
-version = "3.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "006e42d5b888366f1880eda20371fedde764ed2213dc8496f49622fa0c99cd5e"
-dependencies = [
- "log",
- "winapi",
-]
-
 [[package]]
 name = "overload"
 version = "0.1.1"
@@ -2470,6 +2422,51 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
+[[package]]
+name = "pest"
+version = "2.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56f8023d0fb78c8e03784ea1c7f3fa36e68a723138990b8d5a47d916b651e7a8"
+dependencies = [
+ "memchr",
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0d24f72393fd16ab6ac5738bc33cdb6a9aa73f8b902e8fe29cf4e67d7dd1026"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fdc17e2a6c7d0a492f0158d7a4bd66cc17280308bbaff78d5bef566dca35ab80"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.58",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "934cd7631c050f4674352a6e835d5f6711ffbfb9345c2fc0107155ac495ae293"
+dependencies = [
+ "once_cell",
+ "pest",
+ "sha2",
+]
+
 [[package]]
 name = "petgraph"
 version = "0.6.4"
@@ -2503,14 +2500,14 @@ checksum = "2f38a4412a78282e09a2cf38d195ea5420d15ba0602cb375210efbc877243965"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
+checksum = "bda66fc9667c18cb2758a2ac84d1167245054bcf85d5d1aaa6923f45801bdd02"
 
 [[package]]
 name = "pin-utils"
@@ -2669,7 +2666,7 @@ dependencies = [
  "cfg-if",
  "indoc",
  "libc",
- "memoffset 0.9.0",
+ "memoffset 0.9.1",
  "parking_lot 0.12.1",
  "portable-atomic",
  "pyo3-build-config",
@@ -2718,7 +2715,7 @@ dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -2731,7 +2728,7 @@ dependencies = [
  "proc-macro2",
  "pyo3-build-config",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -2756,9 +2753,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.35"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
  "proc-macro2",
 ]
@@ -2807,9 +2804,9 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.9.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4963ed1bc86e4f3ee217022bd855b297cef07fb9eac5dfa1f788b220b49b3bd"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
 dependencies = [
  "either",
  "rayon-core",
@@ -2860,9 +2857,9 @@ dependencies = [
 
 [[package]]
 name = "redox_users"
-version = "0.4.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a18479200779601e498ada4e8c1e1f50e3ee19deb0259c25825a98b5603b2cb4"
+checksum = "bd283d9651eeda4b2a83a43c1c91b266c40fd76ecd39a50a8c630ae69dc72891"
 dependencies = [
  "getrandom",
  "libredox",
@@ -2882,14 +2879,14 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.10.3"
+version = "1.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b62dbe01f0b06f9d8dc7d49e05a0785f153b00b2c227856282f671e0318c9b15"
+checksum = "c117dbdfde9c8308975b6a18d71f3f385c89461f7b3fb054288ecf2a2058ba4c"
 dependencies = [
  "aho-corasick",
  "memchr",
  "regex-automata 0.4.6",
- "regex-syntax 0.8.2",
+ "regex-syntax 0.8.3",
 ]
 
 [[package]]
@@ -2909,7 +2906,7 @@ checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-syntax 0.8.2",
+ "regex-syntax 0.8.3",
 ]
 
 [[package]]
@@ -2920,9 +2917,9 @@ checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.2"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+checksum = "adad44e29e4c806119491a7f06f03de4d1af22c3a680dd47f1e6e179439d1f56"
 
 [[package]]
 name = "rend"
@@ -2955,45 +2952,45 @@ dependencies = [
  "unscanny",
  "url",
  "uv-client",
+ "uv-configuration",
  "uv-fs",
  "uv-normalize",
- "uv-types",
  "uv-warnings",
 ]
 
 [[package]]
 name = "reqwest"
-version = "0.11.26"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78bf93c4af7a8bb7d879d51cebe797356ff10ae8516ace542b5182d9dcac10b2"
+checksum = "3e6cc1e89e689536eb5aeede61520e874df5a4707df811cd5da4aa5fbb2aae19"
 dependencies = [
  "async-compression",
- "base64 0.21.7",
+ "base64 0.22.0",
  "bytes",
- "encoding_rs",
+ "futures-channel",
  "futures-core",
  "futures-util",
- "h2 0.3.24",
- "http 0.2.12",
- "http-body 0.4.6",
- "hyper 0.14.28",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
  "hyper-rustls",
+ "hyper-util",
  "ipnet",
  "js-sys",
  "log",
  "mime",
- "mime_guess",
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
  "rustls",
  "rustls-native-certs",
  "rustls-pemfile",
+ "rustls-pki-types",
  "serde",
  "serde_json",
  "serde_urlencoded",
  "sync_wrapper",
- "system-configuration",
  "tokio",
  "tokio-rustls",
  "tokio-util",
@@ -3009,37 +3006,36 @@ dependencies = [
 
 [[package]]
 name = "reqwest-middleware"
-version = "0.2.5"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a735987236a8e238bf0296c7e351b999c188ccc11477f311b82b55c93984216"
+checksum = "0209efb52486ad88136190094ee214759ef7507068b27992256ed6610eb71a01"
 dependencies = [
  "anyhow",
  "async-trait",
- "http 0.2.12",
+ "http",
  "reqwest",
  "serde",
- "task-local-extensions",
  "thiserror",
+ "tower-service",
 ]
 
 [[package]]
 name = "reqwest-retry"
-version = "0.3.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9af20b65c2ee9746cc575acb6bd28a05ffc0d15e25c992a8f4462d8686aacb4f"
+checksum = "40f342894422862af74c50e1e9601cf0931accc9c6981e5eb413c46603b616b5"
 dependencies = [
  "anyhow",
  "async-trait",
  "chrono",
  "futures",
  "getrandom",
- "http 0.2.12",
- "hyper 0.14.28",
+ "http",
+ "hyper",
  "parking_lot 0.11.2",
  "reqwest",
  "reqwest-middleware",
  "retry-policies",
- "task-local-extensions",
  "tokio",
  "tracing",
  "wasm-timer",
@@ -3066,9 +3062,9 @@ dependencies = [
 
 [[package]]
 name = "retry-policies"
-version = "0.2.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17dd00bff1d737c40dbcd47d4375281bf4c17933f9eef0a185fc7bacca23ecbd"
+checksum = "493b4243e32d6eedd29f9a398896e35c6943a123b55eec97dcaee98310d25810"
 dependencies = [
  "anyhow",
  "chrono",
@@ -3201,11 +3197,11 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
 [[package]]
 name = "rustix"
-version = "0.38.31"
+version = "0.38.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ea3e1a662af26cd7a3ba09c0297a31af215563ecf42817c98df621387f4e949"
+checksum = "65e04861e65f21776e67888bfbea442b3642beaa0138fdb1dd7a84a52dffdb89"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 2.5.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -3214,44 +3210,55 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.21.10"
+version = "0.22.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9d5a6813c0759e4609cd494e8e725babae6a2ca7b62a5536a13daaec6fcb7ba"
+checksum = "99008d7ad0bbbea527ec27bddbc0e432c5b87d8175178cee68d2eec9c4a1813c"
 dependencies = [
  "log",
  "ring",
+ "rustls-pki-types",
  "rustls-webpki",
- "sct",
+ "subtle",
+ "zeroize",
 ]
 
 [[package]]
 name = "rustls-native-certs"
-version = "0.6.3"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9aace74cb666635c918e9c12bc0d348266037aa8eb599b5cba565709a8dff00"
+checksum = "8f1fb85efa936c42c6d5fc28d2629bb51e4b2f4b8a5211e297d599cc5a093792"
 dependencies = [
  "openssl-probe",
  "rustls-pemfile",
+ "rustls-pki-types",
  "schannel",
  "security-framework",
 ]
 
 [[package]]
 name = "rustls-pemfile"
-version = "1.0.4"
+version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c74cae0a4cf6ccbbf5f359f08efdf8ee7e1dc532573bf0db71968cb56b1448c"
+checksum = "29993a25686778eb88d4189742cd713c9bce943bc54251a33509dc63cbacf73d"
 dependencies = [
- "base64 0.21.7",
+ "base64 0.22.0",
+ "rustls-pki-types",
 ]
 
 [[package]]
-name = "rustls-webpki"
-version = "0.101.7"
+name = "rustls-pki-types"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b6275d1ee7a1cd780b64aca7726599a1dbc893b1e64144529e55c3c2f745765"
+checksum = "ecd36cc4259e3e4514335c4a138c6b43171a8d61d8f5c9348f9fc7529416f247"
+
+[[package]]
+name = "rustls-webpki"
+version = "0.102.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faaa0a62740bedb9b2ef5afa303da42764c012f743917351dc9a237ea1663610"
 dependencies = [
  "ring",
+ "rustls-pki-types",
  "untrusted",
 ]
 
@@ -3301,16 +3308,6 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
-[[package]]
-name = "sct"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da046153aa2352493d6cb7da4b6e5c0c057d8a1d0a9aa8560baffdd945acd414"
-dependencies = [
- "ring",
- "untrusted",
-]
-
 [[package]]
 name = "seahash"
 version = "4.1.0"
@@ -3319,9 +3316,9 @@ checksum = "1c107b6f4780854c8b126e228ea8869f4d7b71260f962fefb57b996b8959ba6b"
 
 [[package]]
 name = "security-framework"
-version = "2.9.2"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05b64fb303737d99b81884b2c63433e9ae28abebe5eb5045dcdd175dc2ecf4de"
+checksum = "770452e37cad93e0a50d5abc3990d2bc351c36d0328f86cefec2f2fb206eaef6"
 dependencies = [
  "bitflags 1.3.2",
  "core-foundation",
@@ -3332,14 +3329,20 @@ dependencies = [
 
 [[package]]
 name = "security-framework-sys"
-version = "2.9.1"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e932934257d3b408ed8f30db49d85ea163bfe74961f017f405b025af298f0c7a"
+checksum = "41f3cc463c0ef97e11c3461a9d3787412d30e8e7eb907c79180c4a57bf7c04ef"
 dependencies = [
  "core-foundation-sys",
  "libc",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92d43fe69e652f3df9bdc2b85b2854a0825b86e4fb76bc44d945137d053639ca"
+
 [[package]]
 name = "serde"
 version = "1.0.197"
@@ -3357,14 +3360,14 @@ checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.114"
+version = "1.0.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c5f09b1bd632ef549eaa9f60a1f8de742bdbc698e6cee2095fc84dde5f549ae0"
+checksum = "12dc5c46daa8e9fdf4f5e71b6cf9a53f2487da0e86e55808e2d35539666497dd"
 dependencies = [
  "itoa",
  "ryu",
@@ -3452,9 +3455,9 @@ checksum = "f27f6278552951f1f2b8cf9da965d10969b2efdea95a6ec47987ab46edfe263a"
 
 [[package]]
 name = "similar"
-version = "2.4.0"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32fea41aca09ee824cc9724996433064c89f7777e60762749a4170a14abbfa21"
+checksum = "fa42c91313f1d05da9b26f267f931cf178d4aba455b4c4622dd7355eb80c6640"
 
 [[package]]
 name = "simplecss"
@@ -3482,9 +3485,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.13.1"
+version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6ecd384b10a64542d77071bd64bd7b231f4ed5940fba55e98c3de13824cf3d7"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "smawk"
@@ -3519,9 +3522,9 @@ dependencies = [
 
 [[package]]
 name = "strsim"
-version = "0.11.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ee073c9e4cd00e28217186dbe12796d692868f432bf2e97ee73bed0c56dfa01"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "subtle"
@@ -3599,9 +3602,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.52"
+version = "2.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b699d15b36d1f02c3e7c69f8ffef53de37aefae075d8488d4ba1a7788d574a07"
+checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3624,27 +3627,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "system-configuration"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba3a3adc5c275d719af8cb4272ea1c4a6d668a777f37e115f6d11ddbc1c8e0e7"
-dependencies = [
- "bitflags 1.3.2",
- "core-foundation",
- "system-configuration-sys",
-]
-
-[[package]]
-name = "system-configuration-sys"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75fb188eb626b924683e3b95e3a48e63551fcfb51949de2f06a9d91dbee93c9"
-dependencies = [
- "core-foundation-sys",
- "libc",
-]
-
 [[package]]
 name = "tagu"
 version = "0.1.6"
@@ -3663,20 +3645,11 @@ version = "0.12.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
 
-[[package]]
-name = "task-local-extensions"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba323866e5d033818e3240feeb9f7db2c4296674e4d9e16b97b7bf8f490434e8"
-dependencies = [
- "pin-utils",
-]
-
 [[package]]
 name = "temp-dir"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd16aa9ffe15fe021c6ee3766772132c6e98dfa395a167e16864f61a9cfb71d6"
+checksum = "1f227968ec00f0e5322f9b8173c7a0cbcff6181a0a5b28e9892491c286277231"
 
 [[package]]
 name = "tempfile"
@@ -3724,7 +3697,7 @@ dependencies = [
  "cfg-if",
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -3735,7 +3708,7 @@ checksum = "5c89e72a01ed4c579669add59014b9a524d609c0c88c6a585ce37485879f6ffb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
  "test-case-core",
 ]
 
@@ -3776,7 +3749,7 @@ checksum = "c61f3ba182994efc43764a46c018c347bc492c79f024e705f46567b418f6d4f7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -3867,9 +3840,9 @@ checksum = "b130bd8a58c163224b44e217b4239ca7b927d82bf6cc2fea1fc561d15056e3f7"
 
 [[package]]
 name = "tokio"
-version = "1.36.0"
+version = "1.37.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61285f6515fa018fb2d1e46eb21223fff441ee8db5d0f1435e8ab4f5cdb80931"
+checksum = "1adbebffeca75fcfd058afa480fb6c0b81e165a0323f9c9d39c9697e37c46787"
 dependencies = [
  "backtrace",
  "bytes",
@@ -3892,24 +3865,25 @@ checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
 name = "tokio-rustls"
-version = "0.24.1"
+version = "0.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c28327cf380ac148141087fbfb9de9d7bd4e84ab5d2c28fbc911d753de8a7081"
+checksum = "775e0c0f0adb3a2f22a00c4745d728b479985fc15ee7ca6a2608388c5569860f"
 dependencies = [
  "rustls",
+ "rustls-pki-types",
  "tokio",
 ]
 
 [[package]]
 name = "tokio-stream"
-version = "0.1.14"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "397c988d37662c7dda6d2208364a706264bf3d6138b11d436cbac0ad38832842"
+checksum = "267ac89e0bec6e691e5813911606935d77c476ff49024f98abcea3e7b15e37af"
 dependencies = [
  "futures-core",
  "pin-project-lite",
@@ -3970,9 +3944,9 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.22.8"
+version = "0.22.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c12219811e0c1ba077867254e5ad62ee2c9c190b0d957110750ac0cda1ae96cd"
+checksum = "8e40bb779c5187258fd7aad0eb68cb8706a0a81fa712fbea808ab43c4b8374c4"
 dependencies = [
  "indexmap",
  "serde",
@@ -3981,6 +3955,28 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "tower"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
+dependencies = [
+ "futures-core",
+ "futures-util",
+ "pin-project",
+ "pin-project-lite",
+ "tokio",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "tower-layer"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c20c8dbed6283a09604c3e69b4b7eeb54e298b8a600d4d5ecb5ad39de609f1d0"
+
 [[package]]
 name = "tower-service"
 version = "0.3.2"
@@ -4007,7 +4003,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -4123,13 +4119,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
 [[package]]
-name = "unicase"
-version = "2.7.0"
+name = "ucd-trie"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7d2d4dafb69621809a81864c9c1b864479e1235c0dd4e199924b9742439ed89"
-dependencies = [
- "version_check",
-]
+checksum = "ed646292ffc8188ef8ea4d1e0e0150fb15a5c2e12ad9b8fc191ae7a8a7f3c4b9"
 
 [[package]]
 name = "unicode-bidi"
@@ -4283,14 +4276,14 @@ checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
 
 [[package]]
 name = "uv"
-version = "0.1.28"
+version = "0.1.31"
 dependencies = [
  "anstream",
  "anyhow",
  "assert_cmd",
  "assert_fs",
  "axoupdater",
- "base64 0.21.7",
+ "base64 0.22.0",
  "byteorder",
  "chrono",
  "clap",
@@ -4331,6 +4324,7 @@ dependencies = [
  "uv-auth",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-dispatch",
  "uv-distribution",
  "uv-fs",
@@ -4339,6 +4333,7 @@ dependencies = [
  "uv-normalize",
  "uv-requirements",
  "uv-resolver",
+ "uv-toolchain",
  "uv-types",
  "uv-virtualenv",
  "uv-warnings",
@@ -4349,13 +4344,13 @@ name = "uv-auth"
 version = "0.0.1"
 dependencies = [
  "async-trait",
- "base64 0.21.7",
+ "base64 0.22.0",
  "clap",
+ "http",
  "once_cell",
  "reqwest",
  "reqwest-middleware",
  "rust-netrc",
- "task-local-extensions",
  "tempfile",
  "thiserror",
  "tokio",
@@ -4387,6 +4382,7 @@ dependencies = [
  "tokio",
  "toml",
  "tracing",
+ "uv-configuration",
  "uv-fs",
  "uv-interpreter",
  "uv-types",
@@ -4431,11 +4427,12 @@ dependencies = [
  "fs-err",
  "futures",
  "html-escape",
- "http 0.2.12",
- "hyper 0.14.28",
+ "http",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
  "insta",
  "install-wheel-rs",
- "os_info",
  "pep440_rs",
  "pep508_rs",
  "platform-tags",
@@ -4445,13 +4442,9 @@ dependencies = [
  "reqwest-retry",
  "rkyv",
  "rmp-serde",
- "rustc-hash",
- "rustls",
- "rustls-native-certs",
  "serde",
  "serde_json",
  "sys-info",
- "task-local-extensions",
  "tempfile",
  "thiserror",
  "tl",
@@ -4462,11 +4455,25 @@ dependencies = [
  "urlencoding",
  "uv-auth",
  "uv-cache",
+ "uv-configuration",
  "uv-fs",
  "uv-normalize",
  "uv-version",
  "uv-warnings",
- "webpki-roots",
+]
+
+[[package]]
+name = "uv-configuration"
+version = "0.0.1"
+dependencies = [
+ "anyhow",
+ "clap",
+ "itertools 0.12.1",
+ "pep508_rs",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "uv-normalize",
 ]
 
 [[package]]
@@ -4503,11 +4510,14 @@ dependencies = [
  "uv-build",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-dispatch",
+ "uv-fs",
  "uv-installer",
  "uv-interpreter",
  "uv-normalize",
  "uv-resolver",
+ "uv-toolchain",
  "uv-types",
  "walkdir",
 ]
@@ -4526,9 +4536,9 @@ dependencies = [
  "uv-build",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-installer",
  "uv-interpreter",
- "uv-requirements",
  "uv-resolver",
  "uv-types",
 ]
@@ -4544,6 +4554,7 @@ dependencies = [
  "fs-err",
  "futures",
  "install-wheel-rs",
+ "md-5",
  "nanoid",
  "once_cell",
  "pep440_rs",
@@ -4555,6 +4566,7 @@ dependencies = [
  "rmp-serde",
  "rustc-hash",
  "serde",
+ "sha2",
  "tempfile",
  "thiserror",
  "tokio",
@@ -4563,6 +4575,7 @@ dependencies = [
  "url",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-extract",
  "uv-fs",
  "uv-git",
@@ -4579,8 +4592,11 @@ dependencies = [
  "async_zip",
  "fs-err",
  "futures",
+ "md-5",
+ "pypi-types",
  "rayon",
  "rustc-hash",
+ "sha2",
  "thiserror",
  "tokio",
  "tokio-tar",
@@ -4612,7 +4628,7 @@ name = "uv-git"
 version = "0.0.1"
 dependencies = [
  "anyhow",
- "base64 0.21.7",
+ "base64 0.22.0",
  "cache-key",
  "cargo-util",
  "fs-err",
@@ -4645,6 +4661,7 @@ dependencies = [
  "pypi-types",
  "rayon",
  "requirements-txt",
+ "rmp-serde",
  "rustc-hash",
  "serde",
  "tempfile",
@@ -4655,6 +4672,7 @@ dependencies = [
  "url",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-distribution",
  "uv-extract",
  "uv-fs",
@@ -4692,6 +4710,7 @@ dependencies = [
  "tracing",
  "uv-cache",
  "uv-fs",
+ "uv-toolchain",
  "which",
  "winapi",
 ]
@@ -4728,6 +4747,7 @@ dependencies = [
  "tracing",
  "url",
  "uv-client",
+ "uv-configuration",
  "uv-distribution",
  "uv-fs",
  "uv-normalize",
@@ -4753,6 +4773,7 @@ dependencies = [
  "futures",
  "indexmap",
  "insta",
+ "install-wheel-rs",
  "itertools 0.12.1",
  "once-map",
  "once_cell",
@@ -4766,6 +4787,7 @@ dependencies = [
  "requirements-txt",
  "rkyv",
  "rustc-hash",
+ "textwrap",
  "thiserror",
  "tokio",
  "tokio-stream",
@@ -4773,6 +4795,7 @@ dependencies = [
  "url",
  "uv-cache",
  "uv-client",
+ "uv-configuration",
  "uv-distribution",
  "uv-interpreter",
  "uv-normalize",
@@ -4780,26 +4803,55 @@ dependencies = [
  "uv-warnings",
 ]
 
+[[package]]
+name = "uv-toolchain"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "fs-err",
+ "futures",
+ "once_cell",
+ "pep440_rs",
+ "pep508_rs",
+ "reqwest",
+ "reqwest-middleware",
+ "tempfile",
+ "thiserror",
+ "tokio",
+ "tokio-util",
+ "tracing",
+ "url",
+ "uv-client",
+ "uv-extract",
+ "uv-fs",
+]
+
 [[package]]
 name = "uv-types"
 version = "0.0.1"
 dependencies = [
  "anyhow",
+ "clap",
  "distribution-types",
  "itertools 0.12.1",
  "once-map",
+ "pep440_rs",
  "pep508_rs",
+ "pypi-types",
  "rustc-hash",
  "serde",
  "serde_json",
+ "thiserror",
+ "url",
  "uv-cache",
+ "uv-configuration",
  "uv-interpreter",
  "uv-normalize",
 ]
 
 [[package]]
 name = "uv-version"
-version = "0.1.28"
+version = "0.1.31"
 
 [[package]]
 name = "uv-virtualenv"
@@ -4937,7 +4989,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
  "wasm-bindgen-shared",
 ]
 
@@ -4971,7 +5023,7 @@ checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -5022,9 +5074,12 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "0.25.4"
+version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f20c57d8d7db6d3b86154206ae5d8fba62dd39573114de97c2cb0578251f8e1"
+checksum = "b3de34ae270483955a94f4b21bdaaeb83d508bb84a01435f393818edb0012009"
+dependencies = [
+ "rustls-pki-types",
+]
 
 [[package]]
 name = "weezl"
@@ -5034,22 +5089,21 @@ checksum = "53a85b86a771b1c87058196170769dd264f66c0782acf1ae6cc51bfd64b39082"
 
 [[package]]
 name = "which"
-version = "6.0.0"
+version = "6.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fa5e0c10bf77f44aac573e498d1a82d5fbd5e91f6fc0a99e7be4b38e85e101c"
+checksum = "8211e4f58a2b2805adfbefbc07bab82958fc91e3836339b1ab7ae32465dce0d7"
 dependencies = [
  "either",
  "home",
- "once_cell",
  "rustix",
- "windows-sys 0.52.0",
+ "winsafe",
 ]
 
 [[package]]
 name = "widestring"
-version = "1.0.2"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "653f141f39ec16bba3c5abe400a0c60da7468261cc2cbf36805022876bc721a8"
+checksum = "7219d36b6eac893fa81e84ebe06485e7dcbb616177469b142df14f1f4deb1311"
 
 [[package]]
 name = "winapi"
@@ -5131,7 +5185,7 @@ checksum = "12168c33176773b86799be25e2a2ba07c7aab9968b37541f1094dbd7a60c8946"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -5142,7 +5196,7 @@ checksum = "9d8dc32e0095a7eeccebd0e3f09e9509365ecb3fc6ac4d6f5f14a3f6392942d1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.52",
+ "syn 2.0.58",
 ]
 
 [[package]]
@@ -5297,14 +5351,20 @@ dependencies = [
 
 [[package]]
 name = "winreg"
-version = "0.50.0"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1"
+checksum = "a277a57398d4bfa075df44f501a17cfdf8542d224f0d36095a2adc7aee4ef0a5"
 dependencies = [
  "cfg-if",
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "winsafe"
+version = "0.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d135d17ab770252ad95e9a872d365cf3090e3be864a34ab46f48555993efc904"
+
 [[package]]
 name = "wiremock"
 version = "0.6.0"
@@ -5316,9 +5376,9 @@ dependencies = [
  "base64 0.21.7",
  "deadpool",
  "futures",
- "http 1.1.0",
+ "http",
  "http-body-util",
- "hyper 1.2.0",
+ "hyper",
  "hyper-util",
  "log",
  "once_cell",
@@ -5370,13 +5430,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "66fee0b777b0f5ac1c69bb06d361268faafa61cd4682ae064a171c16c433e9e4"
 
 [[package]]
-name = "yaml-rust"
-version = "0.4.5"
+name = "zeroize"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
-dependencies = [
- "linked-hash-map",
-]
+checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
 
 [[package]]
 name = "zip"
@@ -5389,3 +5446,31 @@ dependencies = [
  "crossbeam-utils",
  "flate2",
 ]
+
+[[package]]
+name = "zstd"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d789b1514203a1120ad2429eae43a7bd32b90976a7bb8a05f7ec02fa88cc23a"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "7.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1cd99b45c6bc03a018c8b8a86025678c87e55526064e38f9df301989dce7ec0a"
+dependencies = [
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.10+zstd.1.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c253a4914af5bafc8fa8c86ee400827e83cf6ec01195ec1f1ed8441bf00d65aa"
+dependencies = [
+ "cc",
+ "pkg-config",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 1b05003d5..b253d8a36 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,21 +44,23 @@ uv-normalize = { path = "crates/uv-normalize" }
 uv-requirements = { path = "crates/uv-requirements" }
 uv-resolver = { path = "crates/uv-resolver" }
 uv-types = { path = "crates/uv-types" }
+uv-configuration = { path = "crates/uv-configuration" }
 uv-trampoline = { path = "crates/uv-trampoline" }
 uv-version = { path = "crates/uv-version" }
 uv-virtualenv = { path = "crates/uv-virtualenv" }
 uv-warnings = { path = "crates/uv-warnings" }
+uv-toolchain = { path = "crates/uv-toolchain" }
 
 anstream = { version = "0.6.13" }
 anyhow = { version = "1.0.80" }
 async-channel = { version = "2.2.0" }
 async-compression = { version = "0.4.6" }
 async-trait = { version = "0.1.78" }
-async_http_range_reader = { version = "0.7.0" }
-async_zip = { git = "https://github.com/charliermarsh/rs-async-zip", rev = "d76801da0943de985254fc6255c0e476b57c5836", features = ["deflate"] }
-axoupdater = { version = "0.3.1", default-features = false }
+async_http_range_reader = { version = "0.7.1" }
+async_zip = { git = "https://github.com/charliermarsh/rs-async-zip", rev = "1dcb40cfe1bf5325a6fd4bfcf9894db40241f585", features = ["deflate"] }
+axoupdater = { version = "0.4.0", default-features = false }
 backoff = { version = "0.4.0" }
-base64 = { version = "0.21.7" }
+base64 = { version = "0.22.0" }
 cachedir = { version = "0.3.1" }
 cargo-util = { version = "0.2.8" }
 chrono = { version = "0.4.31" }
@@ -85,13 +87,14 @@ hex = { version = "0.4.3" }
 hmac = { version = "0.12.1" }
 home = { version = "0.5.9" }
 html-escape = { version = "0.2.13" }
-http = { version = "0.2.12" }
+http = { version = "1.1.0" }
 indexmap = { version = "2.2.5" }
 indicatif = { version = "0.17.7" }
 indoc = { version = "2.0.4" }
 itertools = { version = "0.12.1" }
 junction = { version = "1.0.0" }
 mailparse = { version = "0.14.0" }
+md-5 = { version = "0.10.6" }
 miette = { version = "7.2.0" }
 nanoid = { version = "0.4.0" }
 once_cell = { version = "1.19.0" }
@@ -106,9 +109,9 @@ rand = { version = "0.8.5" }
 rayon = { version = "1.8.0" }
 reflink-copy = { version = "0.1.15" }
 regex = { version = "1.10.2" }
-reqwest = { version = "0.11.23", default-features = false, features = ["json", "gzip", "brotli", "stream", "rustls-tls", "rustls-tls-native-roots"] }
-reqwest-middleware = { version = "0.2.4" }
-reqwest-retry = { version = "0.3.0" }
+reqwest = { version = "0.12.3", default-features = false, features = ["json", "gzip", "brotli", "stream", "rustls-tls", "rustls-tls-native-roots"] }
+reqwest-middleware = { version = "0.3.0" }
+reqwest-retry = { version = "0.5.0" }
 rkyv = { version = "0.7.43", features = ["strict", "validation"] }
 rmp-serde = { version = "1.1.2" }
 rust-netrc = { version = "0.1.1" }
@@ -120,7 +123,6 @@ serde_json = { version = "1.0.114" }
 sha1 = { version = "0.10.6" }
 sha2 = { version = "0.10.8" }
 sys-info = { version = "0.9.1" }
-task-local-extensions = { version = "0.1.4" }
 tempfile = { version = "3.9.0" }
 textwrap = { version = "0.16.1" }
 thiserror = { version = "1.0.56" }
@@ -133,7 +135,7 @@ toml = { version = "0.8.12" }
 tracing = { version = "0.1.40" }
 tracing-durations-export = { version = "0.2.0", features = ["plot"] }
 tracing-indicatif = { version = "0.3.6" }
-tracing-subscriber = { version = "0.3.18", features = ["env-filter", "json"] }
+tracing-subscriber = { version = "0.3.18", features = ["env-filter", "json", "registry"] }
 tracing-tree = { version = "0.3.0" }
 unicode-width = { version = "0.1.11" }
 unscanny = { version = "0.1.0" }
@@ -197,7 +199,7 @@ lto = "thin"
 # Config for 'cargo dist'
 [workspace.metadata.dist]
 # The preferred cargo-dist version to use in CI (Cargo.toml SemVer syntax)
-cargo-dist-version = "0.13.0-prerelease.3"
+cargo-dist-version = "0.13.0"
 # CI backends to support
 ci = ["github"]
 # The installers to generate for each app
@@ -207,8 +209,24 @@ windows-archive = ".zip"
 # The archive format to use for non-windows builds (defaults .tar.xz)
 unix-archive = ".tar.gz"
 # Target platforms to build apps for (Rust target-triple syntax)
-targets = ["aarch64-unknown-linux-gnu", "x86_64-unknown-linux-gnu", "i686-unknown-linux-gnu", "aarch64-apple-darwin", "x86_64-apple-darwin", "aarch64-unknown-linux-musl", "x86_64-unknown-linux-musl", "i686-unknown-linux-musl", "x86_64-pc-windows-msvc", "i686-pc-windows-msvc", "armv7-unknown-linux-gnueabihf", "powerpc64-unknown-linux-gnu", "powerpc64le-unknown-linux-gnu", "s390x-unknown-linux-gnu", "armv7-unknown-linux-musleabihf", "arm-unknown-linux-musleabihf"]
-# Whether to auto-include files like READMEs and CHANGELOGs (default true)
+targets = [
+  "aarch64-apple-darwin",
+  "aarch64-unknown-linux-gnu",
+  "aarch64-unknown-linux-musl",
+  "arm-unknown-linux-musleabihf",
+  "armv7-unknown-linux-gnueabihf",
+  "armv7-unknown-linux-musleabihf",
+  "i686-pc-windows-msvc",
+  "i686-unknown-linux-gnu",
+  "i686-unknown-linux-musl",
+  "powerpc64-unknown-linux-gnu",
+  "powerpc64le-unknown-linux-gnu",
+  "s390x-unknown-linux-gnu",
+  "x86_64-apple-darwin",
+  "x86_64-pc-windows-msvc",
+  "x86_64-unknown-linux-gnu",
+  "x86_64-unknown-linux-musl",
+]# Whether to auto-include files like READMEs and CHANGELOGs (default true)
 auto-includes = false
 # Whether cargo-dist should create a Github Release or use an existing draft
 create-release = true
diff --git a/PIP_COMPATIBILITY.md b/PIP_COMPATIBILITY.md
index 413f117c6..df70d3487 100644
--- a/PIP_COMPATIBILITY.md
+++ b/PIP_COMPATIBILITY.md
@@ -30,7 +30,7 @@ drawbacks:
    target tool the user is expecting to use.
 4. It prevents uv from introducing any settings or configuration that don't exist in the target
    tool, since otherwise `pip.conf` (or similar) would no longer be usable with `pip`.
-5. It can lead user confusion, since uv would be reading settings that don't actually affect its
+5. It can lead to user confusion, since uv would be reading settings that don't actually affect its
    behavior, and many users may _not_ expect uv to read configuration files intended for other
    tools.
 
@@ -107,7 +107,7 @@ the available versions of a given package. However, uv and `pip` differ in how t
 packages that exist on multiple indexes.
 
 For example, imagine that a company publishes an internal version of `requests` on a private index
-(`--extra-index-url`), but also allow installing packages from PyPI by default. In this case, the
+(`--extra-index-url`), but also allows installing packages from PyPI by default. In this case, the
 private `requests` would conflict with the public [`requests`](https://pypi.org/project/requests/)
 on PyPI.
 
@@ -117,7 +117,7 @@ finds a match. This means that if a package exists on multiple indexes, uv will
 candidate versions to those present in the first index that contains the package.
 
 `pip`, meanwhile, will combine the candidate versions from all indexes, and select the best
-version from the combined set., though it makes [no guarantees around the order](https://github.com/pypa/pip/issues/5045#issuecomment-369521345)
+version from the combined set, though it makes [no guarantees around the order](https://github.com/pypa/pip/issues/5045#issuecomment-369521345)
 in which it searches indexes, and expects that packages are unique up to name and version, even
 across indexes.
 
@@ -128,6 +128,12 @@ internal package, thus causing the malicious package to be installed instead of
 package. See, for example, [the `torchtriton` attack](https://pytorch.org/blog/compromised-nightly-dependency/)
 from December 2022.
 
+As of v0.1.29, users can opt in to `pip`-style behavior for multiple indexes via the
+`--index-strategy unsafe-any-match` command-line option, or the `UV_INDEX_STRATEGY` environment
+variable. When enabled, uv will search for each package across all indexes, and consider all
+available versions when resolving dependencies, prioritizing the `--extra-index-url` indexes over
+the default index URL. (Versions that are duplicated _across_ indexes will be ignored.)
+
 In the future, uv will support pinning packages to dedicated indexes (see: [#171](https://github.com/astral-sh/uv/issues/171)).
 Additionally, [PEP 708](https://peps.python.org/pep-0708/) is a provisional standard that aims to
 address the "dependency confusion" issue across package registries and installers.
@@ -253,14 +259,6 @@ When uv resolutions differ from `pip` in undesirable ways, it's often a sign tha
 are too loose, and that the user should consider tightening them. For example, in the case of
 `starlette` and `fastapi`, the user could require `fastapi>=0.110.0`.
 
-## Hash-checking mode
-
-While uv will include hashes via `uv pip compile --generate-hashes`, it does not support
-hash-checking mode, which is a feature of `pip` that allows users to verify the integrity of
-downloaded packages by checking their hashes against those provided in the `requirements.txt` file.
-
-In the future, uv will support hash-checking mode. For more, see [#474](https://github.com/astral-sh/uv/issues/474).
-
 ## `pip check`
 
 At present, `uv pip check` will surface the following diagnostics:
diff --git a/README.md b/README.md
index 8bba8c9fb..a41081cc4 100644
--- a/README.md
+++ b/README.md
@@ -261,8 +261,18 @@ The specifics of uv's caching semantics vary based on the nature of the dependen
 - **For Git dependencies**, uv caches based on the fully-resolved Git commit hash. As such,
   `uv pip compile` will pin Git dependencies to a specific commit hash when writing the resolved
   dependency set.
-- **For local dependencies**, uv caches based on the last-modified time of the `setup.py` or
-  `pyproject.toml` file.
+- **For local dependencies**, uv caches based on the last-modified time of the source archive (i.e.,
+  the local `.whl` or `.tar.gz` file). For directories, uv caches based on the last-modified time of
+  the `pyproject.toml`, `setup.py`, or `setup.cfg` file.
+
+It's safe to run multiple `uv` commands concurrently, even against the same virtual environment.
+uv's cache is designed to be thread-safe and append-only, and thus robust to multiple concurrent
+readers and writers. uv applies a file-based lock to the target virtual environment when installing,
+to avoid concurrent modifications across processes.
+
+Note that it's _not_ safe to modify the uv cache directly (e.g., `uv cache clean`) while other `uv`
+commands are running, and _never_ safe to modify the cache directly (e.g., by removing a file or
+directory).
 
 If you're running into caching issues, uv includes a few escape hatches:
 
@@ -443,12 +453,22 @@ uv accepts the following command-line arguments as environment variables:
   `lowest-direct`, uv will install the lowest compatible versions of all direct dependencies.
 - `UV_PRERELEASE`: Equivalent to the `--prerelease` command-line argument. For example, if set to
   `allow`, uv will allow pre-release versions for all dependencies.
-- `UV_SYSTEM_PYTHON`:  Equivalent to the `--system` command-line argument. If set to `true`, uv
+- `UV_SYSTEM_PYTHON`: Equivalent to the `--system` command-line argument. If set to `true`, uv
   will use the first Python interpreter found in the system `PATH`.
-  WARNING: `UV_SYSTEM_PYTHON=true` is intended for use in continuous integration (CI) environments and
-  should be used with caution, as it can modify the system Python installation.
+  WARNING: `UV_SYSTEM_PYTHON=true` is intended for use in continuous integration (CI) or
+  containerized environments and should be used with caution, as modifying the system Python
+  can lead to unexpected behavior.
+- `UV_BREAK_SYSTEM_PACKAGES`: Equivalent to the `--break-system-packages` command-line argument. If
+  set to `true`, uv will allow the installation of packages that conflict with system-installed
+  packages.
+  WARNING: `UV_BREAK_SYSTEM_PACKAGES=true` is intended for use in continuous integration (CI) or
+  containerized environments and should be used with caution, as modifying the system Python
+  can lead to unexpected behavior.
 - `UV_NATIVE_TLS`: Equivalent to the `--native-tls` command-line argument. If set to `true`, uv
   will use the system's trust store instead of the bundled `webpki-roots` crate.
+- `UV_INDEX_STRATEGY`: Equivalent to the `--index-strategy` command-line argument. For example, if
+  set to `unsafe-any-match`, uv will consider versions of a given package available across all
+  index URLs, rather than limiting its search to the first index URL that contains the package.
 
 In each case, the corresponding command-line argument takes precedence over an environment variable.
 
diff --git a/crates/distribution-types/src/buildable.rs b/crates/distribution-types/src/buildable.rs
index 1b105d299..42e7fe789 100644
--- a/crates/distribution-types/src/buildable.rs
+++ b/crates/distribution-types/src/buildable.rs
@@ -1,6 +1,7 @@
 use std::borrow::Cow;
 use std::path::Path;
 
+use pep440_rs::Version;
 use url::Url;
 
 use uv_normalize::PackageName;
@@ -28,6 +29,15 @@ impl BuildableSource<'_> {
         }
     }
 
+    /// Return the [`Version`] of the source, if available.
+    pub fn version(&self) -> Option<&Version> {
+        match self {
+            Self::Dist(SourceDist::Registry(dist)) => Some(&dist.filename.version),
+            Self::Dist(_) => None,
+            Self::Url(_) => None,
+        }
+    }
+
     /// Return the [`BuildableSource`] as a [`SourceDist`], if it is a distribution.
     pub fn as_dist(&self) -> Option<&SourceDist> {
         match self {
diff --git a/crates/distribution-types/src/cached.rs b/crates/distribution-types/src/cached.rs
index 2a0da761d..b7ddf5155 100644
--- a/crates/distribution-types/src/cached.rs
+++ b/crates/distribution-types/src/cached.rs
@@ -4,9 +4,11 @@ use anyhow::Result;
 
 use distribution_filename::WheelFilename;
 use pep508_rs::VerbatimUrl;
+use pypi_types::HashDigest;
 use uv_normalize::PackageName;
 
 use crate::direct_url::{DirectUrl, LocalFileUrl};
+use crate::hash::Hashed;
 use crate::{
     BuiltDist, Dist, DistributionMetadata, InstalledMetadata, InstalledVersion, Name, SourceDist,
     VersionOrUrl,
@@ -25,6 +27,7 @@ pub enum CachedDist {
 pub struct CachedRegistryDist {
     pub filename: WheelFilename,
     pub path: PathBuf,
+    pub hashes: Vec<HashDigest>,
 }
 
 #[derive(Debug, Clone)]
@@ -33,45 +36,60 @@ pub struct CachedDirectUrlDist {
     pub url: VerbatimUrl,
     pub path: PathBuf,
     pub editable: bool,
+    pub hashes: Vec<HashDigest>,
 }
 
 impl CachedDist {
     /// Initialize a [`CachedDist`] from a [`Dist`].
-    pub fn from_remote(remote: Dist, filename: WheelFilename, path: PathBuf) -> Self {
+    pub fn from_remote(
+        remote: Dist,
+        filename: WheelFilename,
+        hashes: Vec<HashDigest>,
+        path: PathBuf,
+    ) -> Self {
         match remote {
-            Dist::Built(BuiltDist::Registry(_dist)) => {
-                Self::Registry(CachedRegistryDist { filename, path })
-            }
+            Dist::Built(BuiltDist::Registry(_dist)) => Self::Registry(CachedRegistryDist {
+                filename,
+                path,
+                hashes,
+            }),
             Dist::Built(BuiltDist::DirectUrl(dist)) => Self::Url(CachedDirectUrlDist {
                 filename,
                 url: dist.url,
+                hashes,
                 path,
                 editable: false,
             }),
             Dist::Built(BuiltDist::Path(dist)) => Self::Url(CachedDirectUrlDist {
                 filename,
                 url: dist.url,
+                hashes,
                 path,
                 editable: false,
             }),
-            Dist::Source(SourceDist::Registry(_dist)) => {
-                Self::Registry(CachedRegistryDist { filename, path })
-            }
+            Dist::Source(SourceDist::Registry(_dist)) => Self::Registry(CachedRegistryDist {
+                filename,
+                path,
+                hashes,
+            }),
             Dist::Source(SourceDist::DirectUrl(dist)) => Self::Url(CachedDirectUrlDist {
                 filename,
                 url: dist.url,
+                hashes,
                 path,
                 editable: false,
             }),
             Dist::Source(SourceDist::Git(dist)) => Self::Url(CachedDirectUrlDist {
                 filename,
                 url: dist.url,
+                hashes,
                 path,
                 editable: false,
             }),
             Dist::Source(SourceDist::Path(dist)) => Self::Url(CachedDirectUrlDist {
                 filename,
                 url: dist.url,
+                hashes,
                 path,
                 editable: dist.editable,
             }),
@@ -104,6 +122,7 @@ impl CachedDist {
         }
     }
 
+    /// Returns `true` if the distribution is editable.
     pub fn editable(&self) -> bool {
         match self {
             Self::Registry(_) => false,
@@ -111,6 +130,7 @@ impl CachedDist {
         }
     }
 
+    /// Returns the [`WheelFilename`] of the distribution.
     pub fn filename(&self) -> &WheelFilename {
         match self {
             Self::Registry(dist) => &dist.filename,
@@ -119,12 +139,24 @@ impl CachedDist {
     }
 }
 
+impl Hashed for CachedRegistryDist {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
+}
+
 impl CachedDirectUrlDist {
     /// Initialize a [`CachedDirectUrlDist`] from a [`WheelFilename`], [`url::Url`], and [`Path`].
-    pub fn from_url(filename: WheelFilename, url: VerbatimUrl, path: PathBuf) -> Self {
+    pub fn from_url(
+        filename: WheelFilename,
+        url: VerbatimUrl,
+        hashes: Vec<HashDigest>,
+        path: PathBuf,
+    ) -> Self {
         Self {
             filename,
             url,
+            hashes,
             path,
             editable: false,
         }
diff --git a/crates/distribution-types/src/editable.rs b/crates/distribution-types/src/editable.rs
index 6b5c397df..5894b1151 100644
--- a/crates/distribution-types/src/editable.rs
+++ b/crates/distribution-types/src/editable.rs
@@ -1,4 +1,6 @@
 use std::borrow::Cow;
+use std::collections::btree_map::Entry;
+use std::collections::BTreeMap;
 use std::path::PathBuf;
 
 use url::Url;
@@ -41,3 +43,53 @@ impl std::fmt::Display for LocalEditable {
         std::fmt::Display::fmt(&self.url, f)
     }
 }
+
+/// A collection of [`LocalEditable`]s.
+#[derive(Debug, Clone)]
+pub struct LocalEditables(Vec<LocalEditable>);
+
+impl LocalEditables {
+    /// Merge and dedupe a list of [`LocalEditable`]s.
+    ///
+    /// This function will deduplicate any editables that point to identical paths, merging their
+    /// extras.
+    pub fn from_editables(editables: impl Iterator<Item = LocalEditable>) -> Self {
+        let mut map = BTreeMap::new();
+        for editable in editables {
+            match map.entry(editable.path.clone()) {
+                Entry::Vacant(entry) => {
+                    entry.insert(editable);
+                }
+                Entry::Occupied(mut entry) => {
+                    let existing = entry.get_mut();
+                    existing.extras.extend(editable.extras);
+                }
+            }
+        }
+        Self(map.into_values().collect())
+    }
+
+    /// Return the number of editables.
+    pub fn len(&self) -> usize {
+        self.0.len()
+    }
+
+    /// Return whether the editables are empty.
+    pub fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
+
+    /// Return the editables as a vector.
+    pub fn into_vec(self) -> Vec<LocalEditable> {
+        self.0
+    }
+}
+
+impl IntoIterator for LocalEditables {
+    type Item = LocalEditable;
+    type IntoIter = std::vec::IntoIter<LocalEditable>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
diff --git a/crates/distribution-types/src/file.rs b/crates/distribution-types/src/file.rs
index dd96e63ff..ea31738ff 100644
--- a/crates/distribution-types/src/file.rs
+++ b/crates/distribution-types/src/file.rs
@@ -6,7 +6,8 @@ use thiserror::Error;
 use url::Url;
 
 use pep440_rs::{VersionSpecifiers, VersionSpecifiersParseError};
-use pypi_types::{DistInfoMetadata, Hashes, Yanked};
+use pep508_rs::split_scheme;
+use pypi_types::{DistInfoMetadata, HashDigest, Yanked};
 
 /// Error converting [`pypi_types::File`] to [`distribution_type::File`].
 #[derive(Debug, Error)]
@@ -24,9 +25,9 @@ pub enum FileConversionError {
 #[archive(check_bytes)]
 #[archive_attr(derive(Debug))]
 pub struct File {
-    pub dist_info_metadata: Option<DistInfoMetadata>,
+    pub dist_info_metadata: bool,
     pub filename: String,
-    pub hashes: Hashes,
+    pub hashes: Vec<HashDigest>,
     pub requires_python: Option<VersionSpecifiers>,
     pub size: Option<u64>,
     // N.B. We don't use a chrono DateTime<Utc> here because it's a little
@@ -42,19 +43,24 @@ impl File {
     /// `TryFrom` instead of `From` to filter out files with invalid requires python version specifiers
     pub fn try_from(file: pypi_types::File, base: &Url) -> Result<Self, FileConversionError> {
         Ok(Self {
-            dist_info_metadata: file.dist_info_metadata,
+            dist_info_metadata: file
+                .dist_info_metadata
+                .as_ref()
+                .is_some_and(DistInfoMetadata::is_available),
             filename: file.filename,
-            hashes: file.hashes,
+            hashes: file.hashes.into_digests(),
             requires_python: file
                 .requires_python
                 .transpose()
                 .map_err(|err| FileConversionError::RequiresPython(err.line().clone(), err))?,
             size: file.size,
             upload_time_utc_ms: file.upload_time.map(|dt| dt.timestamp_millis()),
-            url: if file.url.contains("://") {
-                FileLocation::AbsoluteUrl(file.url)
-            } else {
-                FileLocation::RelativeUrl(base.to_string(), file.url)
+            url: {
+                if split_scheme(&file.url).is_some() {
+                    FileLocation::AbsoluteUrl(file.url)
+                } else {
+                    FileLocation::RelativeUrl(base.to_string(), file.url)
+                }
             },
             yanked: file.yanked,
         })
diff --git a/crates/distribution-types/src/hash.rs b/crates/distribution-types/src/hash.rs
new file mode 100644
index 000000000..553a74f55
--- /dev/null
+++ b/crates/distribution-types/src/hash.rs
@@ -0,0 +1,84 @@
+use pypi_types::{HashAlgorithm, HashDigest};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum HashPolicy<'a> {
+    /// No hash policy is specified.
+    None,
+    /// Hashes should be generated (specifically, a SHA-256 hash), but not validated.
+    Generate,
+    /// Hashes should be validated against a pre-defined list of hashes. If necessary, hashes should
+    /// be generated so as to ensure that the archive is valid.
+    Validate(&'a [HashDigest]),
+}
+
+impl<'a> HashPolicy<'a> {
+    /// Returns `true` if the hash policy is `None`.
+    pub fn is_none(&self) -> bool {
+        matches!(self, Self::None)
+    }
+
+    /// Returns `true` if the hash policy is `Generate`.
+    pub fn is_generate(&self) -> bool {
+        matches!(self, Self::Generate)
+    }
+
+    /// Returns `true` if the hash policy is `Validate`.
+    pub fn is_validate(&self) -> bool {
+        matches!(self, Self::Validate(_))
+    }
+
+    /// Return the algorithms used in the hash policy.
+    pub fn algorithms(&self) -> Vec<HashAlgorithm> {
+        match self {
+            Self::None => vec![],
+            Self::Generate => vec![HashAlgorithm::Sha256],
+            Self::Validate(hashes) => {
+                let mut algorithms = hashes.iter().map(HashDigest::algorithm).collect::<Vec<_>>();
+                algorithms.sort();
+                algorithms.dedup();
+                algorithms
+            }
+        }
+    }
+
+    /// Return the digests used in the hash policy.
+    pub fn digests(&self) -> &[HashDigest] {
+        match self {
+            Self::None => &[],
+            Self::Generate => &[],
+            Self::Validate(hashes) => hashes,
+        }
+    }
+}
+
+pub trait Hashed {
+    /// Return the [`HashDigest`]s for the archive.
+    fn hashes(&self) -> &[HashDigest];
+
+    /// Returns `true` if the archive satisfies the given hash policy.
+    fn satisfies(&self, hashes: HashPolicy) -> bool {
+        match hashes {
+            HashPolicy::None => true,
+            HashPolicy::Generate => self
+                .hashes()
+                .iter()
+                .any(|hash| hash.algorithm == HashAlgorithm::Sha256),
+            HashPolicy::Validate(hashes) => self.hashes().iter().any(|hash| hashes.contains(hash)),
+        }
+    }
+
+    /// Returns `true` if the archive includes a hash for at least one of the given algorithms.
+    fn has_digests(&self, hashes: HashPolicy) -> bool {
+        match hashes {
+            HashPolicy::None => true,
+            HashPolicy::Generate => self
+                .hashes()
+                .iter()
+                .any(|hash| hash.algorithm == HashAlgorithm::Sha256),
+            HashPolicy::Validate(hashes) => hashes
+                .iter()
+                .map(HashDigest::algorithm)
+                .any(|algorithm| self.hashes().iter().any(|hash| hash.algorithm == algorithm)),
+        }
+    }
+}
diff --git a/crates/distribution-types/src/id.rs b/crates/distribution-types/src/id.rs
index c6e2a2a8b..989e566e7 100644
--- a/crates/distribution-types/src/id.rs
+++ b/crates/distribution-types/src/id.rs
@@ -1,30 +1,66 @@
 use std::fmt::{Display, Formatter};
+use std::path::PathBuf;
 
+use cache_key::{CanonicalUrl, RepositoryUrl};
 use url::Url;
 
 use pep440_rs::Version;
+use pypi_types::HashDigest;
 use uv_normalize::PackageName;
 
-/// A unique identifier for a package (e.g., `black==23.10.0`).
+/// A unique identifier for a package. A package can either be identified by a name (e.g., `black`)
+/// or a URL (e.g., `git+https://github.com/psf/black`).
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub enum PackageId {
-    NameVersion(PackageName, Version),
-    Url(String),
+    /// The identifier consists of a package name.
+    Name(PackageName),
+    /// The identifier consists of a URL.
+    Url(CanonicalUrl),
 }
 
 impl PackageId {
     /// Create a new [`PackageId`] from a package name and version.
-    pub fn from_registry(name: PackageName, version: Version) -> Self {
-        Self::NameVersion(name, version)
+    pub fn from_registry(name: PackageName) -> Self {
+        Self::Name(name)
     }
 
     /// Create a new [`PackageId`] from a URL.
     pub fn from_url(url: &Url) -> Self {
-        Self::Url(cache_key::digest(&cache_key::CanonicalUrl::new(url)))
+        Self::Url(CanonicalUrl::new(url))
     }
 }
 
 impl Display for PackageId {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Name(name) => write!(f, "{name}"),
+            Self::Url(url) => write!(f, "{url}"),
+        }
+    }
+}
+
+/// A unique identifier for a package at a specific version (e.g., `black==23.10.0`).
+#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub enum VersionId {
+    /// The identifier consists of a package name and version.
+    NameVersion(PackageName, Version),
+    /// The identifier consists of a URL.
+    Url(CanonicalUrl),
+}
+
+impl VersionId {
+    /// Create a new [`VersionId`] from a package name and version.
+    pub fn from_registry(name: PackageName, version: Version) -> Self {
+        Self::NameVersion(name, version)
+    }
+
+    /// Create a new [`VersionId`] from a URL.
+    pub fn from_url(url: &Url) -> Self {
+        Self::Url(CanonicalUrl::new(url))
+    }
+}
+
+impl Display for VersionId {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::NameVersion(name, version) => write!(f, "{name}-{version}"),
@@ -33,33 +69,39 @@ impl Display for PackageId {
     }
 }
 
-/// A unique identifier for a distribution (e.g., `black-23.10.0-py3-none-any.whl`).
+/// A unique resource identifier for the distribution, like a SHA-256 hash of the distribution's
+/// contents.
+///
+/// A distribution is a specific archive of a package at a specific version. For a given package
+/// version, there may be multiple distributions, e.g., source distribution, along with
+/// multiple binary distributions (wheels) for different platforms. As a concrete example,
+/// `black-23.10.0-py3-none-any.whl` would represent a (binary) distribution of the `black` package
+/// at version `23.10.0`.
+///
+/// The distribution ID is used to uniquely identify a distribution. Ideally, the distribution
+/// ID should be a hash of the distribution's contents, though in practice, it's only required
+/// that the ID is unique within a single invocation of the resolver (and so, e.g., a hash of
+/// the URL would also be sufficient).
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
-pub struct DistributionId(String);
-
-impl DistributionId {
-    pub fn new(id: impl Into<String>) -> Self {
-        Self(id.into())
-    }
-}
-
-impl DistributionId {
-    pub fn as_str(&self) -> &str {
-        &self.0
-    }
+pub enum DistributionId {
+    Url(CanonicalUrl),
+    PathBuf(PathBuf),
+    Digest(HashDigest),
+    AbsoluteUrl(String),
+    RelativeUrl(String, String),
 }
 
 /// A unique identifier for a resource, like a URL or a Git repository.
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
-pub struct ResourceId(String);
-
-impl ResourceId {
-    pub fn new(id: impl Into<String>) -> Self {
-        Self(id.into())
-    }
+pub enum ResourceId {
+    Url(RepositoryUrl),
+    PathBuf(PathBuf),
+    Digest(HashDigest),
+    AbsoluteUrl(String),
+    RelativeUrl(String, String),
 }
 
-impl From<&Self> for PackageId {
+impl From<&Self> for VersionId {
     /// Required for `WaitMap::wait`.
     fn from(value: &Self) -> Self {
         value.clone()
diff --git a/crates/distribution-types/src/index_url.rs b/crates/distribution-types/src/index_url.rs
index edfdfea3d..3b0893fc2 100644
--- a/crates/distribution-types/src/index_url.rs
+++ b/crates/distribution-types/src/index_url.rs
@@ -24,6 +24,7 @@ static DEFAULT_INDEX_URL: Lazy<IndexUrl> =
 pub enum IndexUrl {
     Pypi(VerbatimUrl),
     Url(VerbatimUrl),
+    Path(VerbatimUrl),
 }
 
 impl IndexUrl {
@@ -32,6 +33,7 @@ impl IndexUrl {
         match self {
             Self::Pypi(url) => url.raw(),
             Self::Url(url) => url.raw(),
+            Self::Path(url) => url.raw(),
         }
     }
 }
@@ -41,6 +43,7 @@ impl Display for IndexUrl {
         match self {
             Self::Pypi(url) => Display::fmt(url, f),
             Self::Url(url) => Display::fmt(url, f),
+            Self::Path(url) => Display::fmt(url, f),
         }
     }
 }
@@ -50,6 +53,7 @@ impl Verbatim for IndexUrl {
         match self {
             Self::Pypi(url) => url.verbatim(),
             Self::Url(url) => url.verbatim(),
+            Self::Path(url) => url.verbatim(),
         }
     }
 }
@@ -83,6 +87,7 @@ impl From<IndexUrl> for Url {
         match index {
             IndexUrl::Pypi(url) => url.to_url(),
             IndexUrl::Url(url) => url.to_url(),
+            IndexUrl::Path(url) => url.to_url(),
         }
     }
 }
@@ -94,6 +99,7 @@ impl Deref for IndexUrl {
         match &self {
             Self::Pypi(url) => url,
             Self::Url(url) => url,
+            Self::Path(url) => url,
         }
     }
 }
@@ -165,15 +171,7 @@ impl Display for FlatIndexLocation {
     }
 }
 
-/// The index locations to use for fetching packages.
-///
-/// By default, uses the PyPI index.
-///
-/// "pip treats all package sources equally" (<https://github.com/pypa/pip/issues/8606#issuecomment-788754817>),
-/// and so do we, i.e., you can't rely that on any particular order of querying indices.
-///
-/// If the fields are none and empty, ignore the package index, instead rely on local archives and
-/// caches.
+/// The index locations to use for fetching packages. By default, uses the PyPI index.
 ///
 /// From a pip perspective, this type merges `--index-url`, `--extra-index-url`, and `--find-links`.
 #[derive(Debug, Clone)]
@@ -338,7 +336,9 @@ impl<'a> IndexUrls {
         }
     }
 
-    /// Return an iterator over all [`IndexUrl`] entries.
+    /// Return an iterator over all [`IndexUrl`] entries in order.
+    ///
+    /// Prioritizes the extra indexes over the main index.
     ///
     /// If `no_index` was enabled, then this always returns an empty
     /// iterator.
diff --git a/crates/distribution-types/src/lib.rs b/crates/distribution-types/src/lib.rs
index 95ca6c912..600745586 100644
--- a/crates/distribution-types/src/lib.rs
+++ b/crates/distribution-types/src/lib.rs
@@ -51,6 +51,7 @@ pub use crate::direct_url::*;
 pub use crate::editable::*;
 pub use crate::error::*;
 pub use crate::file::*;
+pub use crate::hash::*;
 pub use crate::id::*;
 pub use crate::index_url::*;
 pub use crate::installed::*;
@@ -66,6 +67,7 @@ mod direct_url;
 mod editable;
 mod error;
 mod file;
+mod hash;
 mod id;
 mod index_url;
 mod installed;
@@ -371,6 +373,14 @@ impl Dist {
         }
     }
 
+    /// Returns the [`IndexUrl`], if the distribution is from a registry.
+    pub fn index(&self) -> Option<&IndexUrl> {
+        match self {
+            Self::Built(dist) => dist.index(),
+            Self::Source(dist) => dist.index(),
+        }
+    }
+
     /// Returns the [`File`] instance, if this dist is from a registry with simple json api support
     pub fn file(&self) -> Option<&File> {
         match self {
@@ -388,7 +398,16 @@ impl Dist {
 }
 
 impl BuiltDist {
-    /// Returns the [`File`] instance, if this dist is from a registry with simple json api support
+    /// Returns the [`IndexUrl`], if the distribution is from a registry.
+    pub fn index(&self) -> Option<&IndexUrl> {
+        match self {
+            Self::Registry(registry) => Some(&registry.index),
+            Self::DirectUrl(_) => None,
+            Self::Path(_) => None,
+        }
+    }
+
+    /// Returns the [`File`] instance, if this distribution is from a registry.
     pub fn file(&self) -> Option<&File> {
         match self {
             Self::Registry(registry) => Some(&registry.file),
@@ -406,6 +425,14 @@ impl BuiltDist {
 }
 
 impl SourceDist {
+    /// Returns the [`IndexUrl`], if the distribution is from a registry.
+    pub fn index(&self) -> Option<&IndexUrl> {
+        match self {
+            Self::Registry(registry) => Some(&registry.index),
+            Self::DirectUrl(_) | Self::Git(_) | Self::Path(_) => None,
+        }
+    }
+
     /// Returns the [`File`] instance, if this dist is from a registry with simple json api support
     pub fn file(&self) -> Option<&File> {
         match self {
@@ -764,26 +791,26 @@ impl RemoteSource for Dist {
 
 impl Identifier for Url {
     fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&cache_key::CanonicalUrl::new(self)))
+        DistributionId::Url(cache_key::CanonicalUrl::new(self))
     }
 
     fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&cache_key::RepositoryUrl::new(self)))
+        ResourceId::Url(cache_key::RepositoryUrl::new(self))
     }
 }
 
 impl Identifier for File {
     fn distribution_id(&self) -> DistributionId {
-        if let Some(hash) = self.hashes.as_str() {
-            DistributionId::new(hash)
+        if let Some(hash) = self.hashes.first() {
+            DistributionId::Digest(hash.clone())
         } else {
             self.url.distribution_id()
         }
     }
 
     fn resource_id(&self) -> ResourceId {
-        if let Some(hash) = self.hashes.as_str() {
-            ResourceId::new(hash)
+        if let Some(hash) = self.hashes.first() {
+            ResourceId::Digest(hash.clone())
         } else {
             self.url.resource_id()
         }
@@ -792,67 +819,31 @@ impl Identifier for File {
 
 impl Identifier for Path {
     fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&self))
+        DistributionId::PathBuf(self.to_path_buf())
     }
 
     fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&self))
-    }
-}
-
-impl Identifier for String {
-    fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&self))
-    }
-
-    fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&self))
-    }
-}
-
-impl Identifier for &str {
-    fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&self))
-    }
-
-    fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&self))
-    }
-}
-
-impl Identifier for (&str, &str) {
-    fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&self))
-    }
-
-    fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&self))
-    }
-}
-
-impl Identifier for (&Url, &str) {
-    fn distribution_id(&self) -> DistributionId {
-        DistributionId::new(cache_key::digest(&self))
-    }
-
-    fn resource_id(&self) -> ResourceId {
-        ResourceId::new(cache_key::digest(&self))
+        ResourceId::PathBuf(self.to_path_buf())
     }
 }
 
 impl Identifier for FileLocation {
     fn distribution_id(&self) -> DistributionId {
         match self {
-            Self::RelativeUrl(base, url) => (base.as_str(), url.as_str()).distribution_id(),
-            Self::AbsoluteUrl(url) => url.distribution_id(),
+            Self::RelativeUrl(base, url) => {
+                DistributionId::RelativeUrl(base.to_string(), url.to_string())
+            }
+            Self::AbsoluteUrl(url) => DistributionId::AbsoluteUrl(url.to_string()),
             Self::Path(path) => path.distribution_id(),
         }
     }
 
     fn resource_id(&self) -> ResourceId {
         match self {
-            Self::RelativeUrl(base, url) => (base.as_str(), url.as_str()).resource_id(),
-            Self::AbsoluteUrl(url) => url.resource_id(),
+            Self::RelativeUrl(base, url) => {
+                ResourceId::RelativeUrl(base.to_string(), url.to_string())
+            }
+            Self::AbsoluteUrl(url) => ResourceId::AbsoluteUrl(url.to_string()),
             Self::Path(path) => path.resource_id(),
         }
     }
diff --git a/crates/distribution-types/src/prioritized_distribution.rs b/crates/distribution-types/src/prioritized_distribution.rs
index e039eb311..0a13a4b28 100644
--- a/crates/distribution-types/src/prioritized_distribution.rs
+++ b/crates/distribution-types/src/prioritized_distribution.rs
@@ -1,8 +1,8 @@
 use std::fmt::{Display, Formatter};
 
 use pep440_rs::VersionSpecifiers;
-use platform_tags::{IncompatibleTag, TagCompatibility, TagPriority};
-use pypi_types::{Hashes, Yanked};
+use platform_tags::{IncompatibleTag, TagPriority};
+use pypi_types::{HashDigest, Yanked};
 
 use crate::{Dist, InstalledDist, ResolvedDistRef};
 
@@ -18,7 +18,7 @@ struct PrioritizedDistInner {
     /// The highest-priority wheel.
     wheel: Option<(Dist, WheelCompatibility)>,
     /// The hashes for each distribution.
-    hashes: Vec<Hashes>,
+    hashes: Vec<HashDigest>,
 }
 
 /// A distribution that can be used for both resolution and installation.
@@ -113,7 +113,7 @@ impl Display for IncompatibleDist {
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum WheelCompatibility {
     Incompatible(IncompatibleWheel),
-    Compatible(TagPriority),
+    Compatible(Hash, TagPriority),
 }
 
 #[derive(Debug, PartialEq, Eq, Clone)]
@@ -128,7 +128,7 @@ pub enum IncompatibleWheel {
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum SourceDistCompatibility {
     Incompatible(IncompatibleSource),
-    Compatible,
+    Compatible(Hash),
 }
 
 #[derive(Debug, PartialEq, Eq, Clone)]
@@ -139,26 +139,40 @@ pub enum IncompatibleSource {
     NoBuild,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+pub enum Hash {
+    /// The hash is present, but does not match the expected value.
+    Mismatched,
+    /// The hash is missing.
+    Missing,
+    /// The hash matches the expected value.
+    Matched,
+}
+
 impl PrioritizedDist {
     /// Create a new [`PrioritizedDist`] from the given wheel distribution.
-    pub fn from_built(dist: Dist, hash: Option<Hashes>, compatibility: WheelCompatibility) -> Self {
+    pub fn from_built(
+        dist: Dist,
+        hashes: Vec<HashDigest>,
+        compatibility: WheelCompatibility,
+    ) -> Self {
         Self(Box::new(PrioritizedDistInner {
             wheel: Some((dist, compatibility)),
             source: None,
-            hashes: hash.map(|hash| vec![hash]).unwrap_or_default(),
+            hashes,
         }))
     }
 
     /// Create a new [`PrioritizedDist`] from the given source distribution.
     pub fn from_source(
         dist: Dist,
-        hash: Option<Hashes>,
+        hashes: Vec<HashDigest>,
         compatibility: SourceDistCompatibility,
     ) -> Self {
         Self(Box::new(PrioritizedDistInner {
             wheel: None,
             source: Some((dist, compatibility)),
-            hashes: hash.map(|hash| vec![hash]).unwrap_or_default(),
+            hashes,
         }))
     }
 
@@ -166,7 +180,7 @@ impl PrioritizedDist {
     pub fn insert_built(
         &mut self,
         dist: Dist,
-        hash: Option<Hashes>,
+        hashes: Vec<HashDigest>,
         compatibility: WheelCompatibility,
     ) {
         // Track the highest-priority wheel.
@@ -178,16 +192,14 @@ impl PrioritizedDist {
             self.0.wheel = Some((dist, compatibility));
         }
 
-        if let Some(hash) = hash {
-            self.0.hashes.push(hash);
-        }
+        self.0.hashes.extend(hashes);
     }
 
     /// Insert the given source distribution into the [`PrioritizedDist`].
     pub fn insert_source(
         &mut self,
         dist: Dist,
-        hash: Option<Hashes>,
+        hashes: Vec<HashDigest>,
         compatibility: SourceDistCompatibility,
     ) {
         // Track the highest-priority source.
@@ -199,16 +211,25 @@ impl PrioritizedDist {
             self.0.source = Some((dist, compatibility));
         }
 
-        if let Some(hash) = hash {
-            self.0.hashes.push(hash);
-        }
+        self.0.hashes.extend(hashes);
     }
 
     /// Return the highest-priority distribution for the package version, if any.
     pub fn get(&self) -> Option<CompatibleDist> {
         match (&self.0.wheel, &self.0.source) {
+            // If both are compatible, break ties based on the hash.
+            (
+                Some((wheel, WheelCompatibility::Compatible(wheel_hash, tag_priority))),
+                Some((source_dist, SourceDistCompatibility::Compatible(source_hash))),
+            ) => {
+                if source_hash > wheel_hash {
+                    Some(CompatibleDist::SourceDist(source_dist))
+                } else {
+                    Some(CompatibleDist::CompatibleWheel(wheel, *tag_priority))
+                }
+            }
             // Prefer the highest-priority, platform-compatible wheel.
-            (Some((wheel, WheelCompatibility::Compatible(tag_priority))), _) => {
+            (Some((wheel, WheelCompatibility::Compatible(_, tag_priority))), _) => {
                 Some(CompatibleDist::CompatibleWheel(wheel, *tag_priority))
             }
             // If we have a compatible source distribution and an incompatible wheel, return the
@@ -217,64 +238,42 @@ impl PrioritizedDist {
             // using the wheel is faster.
             (
                 Some((wheel, WheelCompatibility::Incompatible(_))),
-                Some((source_dist, SourceDistCompatibility::Compatible)),
+                Some((source_dist, SourceDistCompatibility::Compatible(_))),
             ) => Some(CompatibleDist::IncompatibleWheel { source_dist, wheel }),
             // Otherwise, if we have a source distribution, return it.
-            (None, Some((source_dist, SourceDistCompatibility::Compatible))) => {
+            (None, Some((source_dist, SourceDistCompatibility::Compatible(_)))) => {
                 Some(CompatibleDist::SourceDist(source_dist))
             }
             _ => None,
         }
     }
 
-    /// Return the compatible source distribution, if any.
-    pub fn compatible_source(&self) -> Option<&Dist> {
-        self.0
-            .source
-            .as_ref()
-            .and_then(|(dist, compatibility)| match compatibility {
-                SourceDistCompatibility::Compatible => Some(dist),
-                SourceDistCompatibility::Incompatible(_) => None,
-            })
-    }
-
     /// Return the incompatible source distribution, if any.
     pub fn incompatible_source(&self) -> Option<(&Dist, &IncompatibleSource)> {
         self.0
             .source
             .as_ref()
             .and_then(|(dist, compatibility)| match compatibility {
-                SourceDistCompatibility::Compatible => None,
+                SourceDistCompatibility::Compatible(_) => None,
                 SourceDistCompatibility::Incompatible(incompatibility) => {
                     Some((dist, incompatibility))
                 }
             })
     }
 
-    /// Return the compatible built distribution, if any.
-    pub fn compatible_wheel(&self) -> Option<(&Dist, TagPriority)> {
-        self.0
-            .wheel
-            .as_ref()
-            .and_then(|(dist, compatibility)| match compatibility {
-                WheelCompatibility::Compatible(priority) => Some((dist, *priority)),
-                WheelCompatibility::Incompatible(_) => None,
-            })
-    }
-
     /// Return the incompatible built distribution, if any.
     pub fn incompatible_wheel(&self) -> Option<(&Dist, &IncompatibleWheel)> {
         self.0
             .wheel
             .as_ref()
             .and_then(|(dist, compatibility)| match compatibility {
-                WheelCompatibility::Compatible(_) => None,
+                WheelCompatibility::Compatible(_, _) => None,
                 WheelCompatibility::Incompatible(incompatibility) => Some((dist, incompatibility)),
             })
     }
 
     /// Return the hashes for each distribution.
-    pub fn hashes(&self) -> &[Hashes] {
+    pub fn hashes(&self) -> &[HashDigest] {
         &self.0.hashes
     }
 
@@ -311,11 +310,23 @@ impl<'a> CompatibleDist<'a> {
             } => ResolvedDistRef::Installable(source_dist),
         }
     }
+
+    /// Returns whether the distribution is a source distribution.
+    ///
+    /// Avoid building source distributions we don't need.
+    pub fn prefetchable(&self) -> bool {
+        match *self {
+            CompatibleDist::SourceDist(_) => false,
+            CompatibleDist::InstalledDist(_)
+            | CompatibleDist::CompatibleWheel(_, _)
+            | CompatibleDist::IncompatibleWheel { .. } => true,
+        }
+    }
 }
 
 impl WheelCompatibility {
     pub fn is_compatible(&self) -> bool {
-        matches!(self, Self::Compatible(_))
+        matches!(self, Self::Compatible(_, _))
     }
 
     /// Return `true` if the current compatibility is more compatible than another.
@@ -324,11 +335,12 @@ impl WheelCompatibility {
     /// Compatible wheel ordering is determined by tag priority.
     pub fn is_more_compatible(&self, other: &Self) -> bool {
         match (self, other) {
-            (Self::Compatible(_), Self::Incompatible(_)) => true,
-            (Self::Compatible(tag_priority), Self::Compatible(other_tag_priority)) => {
-                tag_priority > other_tag_priority
-            }
-            (Self::Incompatible(_), Self::Compatible(_)) => false,
+            (Self::Compatible(_, _), Self::Incompatible(_)) => true,
+            (
+                Self::Compatible(hash, tag_priority),
+                Self::Compatible(other_hash, other_tag_priority),
+            ) => (hash, tag_priority) > (other_hash, other_tag_priority),
+            (Self::Incompatible(_), Self::Compatible(_, _)) => false,
             (Self::Incompatible(incompatibility), Self::Incompatible(other_incompatibility)) => {
                 incompatibility.is_more_compatible(other_incompatibility)
             }
@@ -344,9 +356,11 @@ impl SourceDistCompatibility {
     /// Incompatible source distribution priority selects a source distribution that was "closest" to being usable.
     pub fn is_more_compatible(&self, other: &Self) -> bool {
         match (self, other) {
-            (Self::Compatible, Self::Incompatible(_)) => true,
-            (Self::Compatible, Self::Compatible) => false, // Arbitrary
-            (Self::Incompatible(_), Self::Compatible) => false,
+            (Self::Compatible(_), Self::Incompatible(_)) => true,
+            (Self::Compatible(compatibility), Self::Compatible(other_compatibility)) => {
+                compatibility > other_compatibility
+            }
+            (Self::Incompatible(_), Self::Compatible(_)) => false,
             (Self::Incompatible(incompatibility), Self::Incompatible(other_incompatibility)) => {
                 incompatibility.is_more_compatible(other_incompatibility)
             }
@@ -354,15 +368,6 @@ impl SourceDistCompatibility {
     }
 }
 
-impl From<TagCompatibility> for WheelCompatibility {
-    fn from(value: TagCompatibility) -> Self {
-        match value {
-            TagCompatibility::Compatible(priority) => Self::Compatible(priority),
-            TagCompatibility::Incompatible(tag) => Self::Incompatible(IncompatibleWheel::Tag(tag)),
-        }
-    }
-}
-
 impl IncompatibleSource {
     fn is_more_compatible(&self, other: &Self) -> bool {
         match self {
diff --git a/crates/distribution-types/src/resolved.rs b/crates/distribution-types/src/resolved.rs
index 36a269c18..1f72ba4a0 100644
--- a/crates/distribution-types/src/resolved.rs
+++ b/crates/distribution-types/src/resolved.rs
@@ -1,10 +1,10 @@
-use std::fmt::Display;
+use std::fmt::{Display, Formatter};
 
 use pep508_rs::PackageName;
 
 use crate::{
-    Dist, DistributionId, DistributionMetadata, Identifier, InstalledDist, Name, ResourceId,
-    VersionOrUrl,
+    Dist, DistributionId, DistributionMetadata, Identifier, IndexUrl, InstalledDist, Name,
+    ResourceId, VersionOrUrl,
 };
 
 /// A distribution that can be used for resolution and installation.
@@ -31,6 +31,14 @@ impl ResolvedDist {
             Self::Installed(dist) => dist.is_editable(),
         }
     }
+
+    /// Returns the [`IndexUrl`], if the distribution is from a registry.
+    pub fn index(&self) -> Option<&IndexUrl> {
+        match self {
+            Self::Installable(dist) => dist.index(),
+            Self::Installed(_) => None,
+        }
+    }
 }
 
 impl ResolvedDistRef<'_> {
@@ -42,6 +50,15 @@ impl ResolvedDistRef<'_> {
     }
 }
 
+impl Display for ResolvedDistRef<'_> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Installable(dist) => Display::fmt(dist, f),
+            Self::Installed(dist) => Display::fmt(dist, f),
+        }
+    }
+}
+
 impl Name for ResolvedDistRef<'_> {
     fn name(&self) -> &PackageName {
         match self {
diff --git a/crates/distribution-types/src/traits.rs b/crates/distribution-types/src/traits.rs
index 4f72961bd..5d87219dc 100644
--- a/crates/distribution-types/src/traits.rs
+++ b/crates/distribution-types/src/traits.rs
@@ -10,7 +10,8 @@ use crate::{
     BuiltDist, CachedDirectUrlDist, CachedDist, CachedRegistryDist, DirectUrlBuiltDist,
     DirectUrlSourceDist, Dist, DistributionId, GitSourceDist, InstalledDirectUrlDist,
     InstalledDist, InstalledRegistryDist, InstalledVersion, LocalDist, PackageId, PathBuiltDist,
-    PathSourceDist, RegistryBuiltDist, RegistrySourceDist, ResourceId, SourceDist, VersionOrUrl,
+    PathSourceDist, RegistryBuiltDist, RegistrySourceDist, ResourceId, SourceDist, VersionId,
+    VersionOrUrl,
 };
 
 pub trait Name {
@@ -25,16 +26,29 @@ pub trait DistributionMetadata: Name {
     /// for URL-based distributions.
     fn version_or_url(&self) -> VersionOrUrl;
 
-    /// Returns a unique identifier for the package.
+    /// Returns a unique identifier for the package at the given version (e.g., `black==23.10.0`).
     ///
     /// Note that this is not equivalent to a unique identifier for the _distribution_, as multiple
     /// registry-based distributions (e.g., different wheels for the same package and version)
-    /// will return the same package ID, but different distribution IDs.
-    fn package_id(&self) -> PackageId {
+    /// will return the same version ID, but different distribution IDs.
+    fn version_id(&self) -> VersionId {
         match self.version_or_url() {
             VersionOrUrl::Version(version) => {
-                PackageId::from_registry(self.name().clone(), version.clone())
+                VersionId::from_registry(self.name().clone(), version.clone())
             }
+            VersionOrUrl::Url(url) => VersionId::from_url(url),
+        }
+    }
+
+    /// Returns a unique identifier for a package. A package can either be identified by a name
+    /// (e.g., `black`) or a URL (e.g., `git+https://github.com/psf/black`).
+    ///
+    /// Note that this is not equivalent to a unique identifier for the _distribution_, as multiple
+    /// registry-based distributions (e.g., different wheels for the same package and version)
+    /// will return the same version ID, but different distribution IDs.
+    fn package_id(&self) -> PackageId {
+        match self.version_or_url() {
+            VersionOrUrl::Version(_) => PackageId::from_registry(self.name().clone()),
             VersionOrUrl::Url(url) => PackageId::from_url(url),
         }
     }
@@ -57,6 +71,17 @@ pub trait RemoteSource {
 pub trait Identifier {
     /// Return a unique resource identifier for the distribution, like a SHA-256 hash of the
     /// distribution's contents.
+    ///
+    /// A distribution is a specific archive of a package at a specific version. For a given package
+    /// version, there may be multiple distributions, e.g., source distribution, along with
+    /// multiple binary distributions (wheels) for different platforms. As a concrete example,
+    /// `black-23.10.0-py3-none-any.whl` would represent a (binary) distribution of the `black` package
+    /// at version `23.10.0`.
+    ///
+    /// The distribution ID is used to uniquely identify a distribution. Ideally, the distribution
+    /// ID should be a hash of the distribution's contents, though in practice, it's only required
+    /// that the ID is unique within a single invocation of the resolver (and so, e.g., a hash of
+    /// the URL would also be sufficient).
     fn distribution_id(&self) -> DistributionId;
 
     /// Return a unique resource identifier for the underlying resource backing the distribution.
diff --git a/crates/pep508-rs/src/lib.rs b/crates/pep508-rs/src/lib.rs
index d37eff711..c8091af7d 100644
--- a/crates/pep508-rs/src/lib.rs
+++ b/crates/pep508-rs/src/lib.rs
@@ -72,7 +72,7 @@ pub enum Pep508ErrorSource {
     String(String),
     /// A URL parsing error.
     #[error(transparent)]
-    UrlError(#[from] verbatim_url::VerbatimUrlError),
+    UrlError(#[from] VerbatimUrlError),
     /// The version requirement is not supported.
     #[error("{0}")]
     UnsupportedRequirement(String),
diff --git a/crates/pypi-types/src/base_url.rs b/crates/pypi-types/src/base_url.rs
index d4d991cdb..428920743 100644
--- a/crates/pypi-types/src/base_url.rs
+++ b/crates/pypi-types/src/base_url.rs
@@ -1,37 +1,19 @@
 use serde::{Deserialize, Serialize};
 use url::Url;
 
-/// Join a possibly relative URL to a base URL.
-///
-/// When `maybe_relative` is not relative, then it is parsed and returned with
-/// `base` being ignored.
-///
-/// This is useful for parsing URLs that may be absolute or relative, with a
-/// known base URL, and that doesn't require having already parsed a `BaseUrl`.
-pub fn base_url_join_relative(base: &str, maybe_relative: &str) -> Result<Url, JoinRelativeError> {
-    match Url::parse(maybe_relative) {
-        Ok(absolute) => Ok(absolute),
-        Err(err) => {
-            if err == url::ParseError::RelativeUrlWithoutBase {
-                let base_url = Url::parse(base).map_err(|err| JoinRelativeError::ParseError {
-                    original: base.to_string(),
-                    source: err,
-                })?;
+/// Join a relative URL to a base URL.
+pub fn base_url_join_relative(base: &str, relative: &str) -> Result<Url, JoinRelativeError> {
+    let base_url = Url::parse(base).map_err(|err| JoinRelativeError::ParseError {
+        original: base.to_string(),
+        source: err,
+    })?;
 
-                base_url
-                    .join(maybe_relative)
-                    .map_err(|_| JoinRelativeError::ParseError {
-                        original: format!("{base}/{maybe_relative}"),
-                        source: err,
-                    })
-            } else {
-                Err(JoinRelativeError::ParseError {
-                    original: maybe_relative.to_string(),
-                    source: err,
-                })
-            }
-        }
-    }
+    base_url
+        .join(relative)
+        .map_err(|err| JoinRelativeError::ParseError {
+            original: format!("{base}/{relative}"),
+            source: err,
+        })
 }
 
 /// An error that occurs when `base_url_join_relative` fails.
diff --git a/crates/pypi-types/src/metadata.rs b/crates/pypi-types/src/metadata.rs
index f3b267a00..a5653ed91 100644
--- a/crates/pypi-types/src/metadata.rs
+++ b/crates/pypi-types/src/metadata.rs
@@ -1,9 +1,8 @@
 //! Derived from `pypi_types_crate`.
 
-use indexmap::IndexMap;
-use std::io;
 use std::str::FromStr;
 
+use indexmap::IndexMap;
 use mailparse::{MailHeaderMap, MailParseError};
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
@@ -39,38 +38,17 @@ pub struct Metadata23 {
 ///
 /// The error type
 #[derive(Error, Debug)]
-pub enum Error {
-    /// I/O error
-    #[error(transparent)]
-    Io(#[from] io::Error),
-    /// mail parse error
+pub enum MetadataError {
     #[error(transparent)]
     MailParse(#[from] MailParseError),
-    /// TOML parse error
     #[error(transparent)]
     Toml(#[from] toml::de::Error),
-    /// Metadata field not found
     #[error("metadata field {0} not found")]
     FieldNotFound(&'static str),
-    /// Unknown distribution type
-    #[error("unknown distribution type")]
-    UnknownDistributionType,
-    /// Metadata file not found
-    #[error("metadata file not found")]
-    MetadataNotFound,
-    /// Invalid project URL (no comma)
-    #[error("Invalid Project-URL field (missing comma): '{0}'")]
-    InvalidProjectUrl(String),
-    /// Multiple metadata files found
-    #[error("found multiple metadata files: {0:?}")]
-    MultipleMetadataFiles(Vec<String>),
-    /// Invalid Version
     #[error("invalid version: {0}")]
     Pep440VersionError(VersionParseError),
-    /// Invalid VersionSpecifier
     #[error(transparent)]
     Pep440Error(#[from] VersionSpecifiersParseError),
-    /// Invalid Requirement
     #[error(transparent)]
     Pep508Error(#[from] Pep508Error),
     #[error(transparent)]
@@ -86,20 +64,20 @@ pub enum Error {
 /// From <https://github.com/PyO3/python-pkginfo-rs/blob/d719988323a0cfea86d4737116d7917f30e819e2/src/metadata.rs#LL78C2-L91C26>
 impl Metadata23 {
     /// Parse the [`Metadata23`] from a `METADATA` file, as included in a built distribution (wheel).
-    pub fn parse_metadata(content: &[u8]) -> Result<Self, Error> {
+    pub fn parse_metadata(content: &[u8]) -> Result<Self, MetadataError> {
         let headers = Headers::parse(content)?;
 
         let name = PackageName::new(
             headers
                 .get_first_value("Name")
-                .ok_or(Error::FieldNotFound("Name"))?,
+                .ok_or(MetadataError::FieldNotFound("Name"))?,
         )?;
         let version = Version::from_str(
             &headers
                 .get_first_value("Version")
-                .ok_or(Error::FieldNotFound("Version"))?,
+                .ok_or(MetadataError::FieldNotFound("Version"))?,
         )
-        .map_err(Error::Pep440VersionError)?;
+        .map_err(MetadataError::Pep440VersionError)?;
         let requires_dist = headers
             .get_all_values("Requires-Dist")
             .map(|requires_dist| {
@@ -135,28 +113,28 @@ impl Metadata23 {
     /// Read the [`Metadata23`] from a source distribution's `PKG-INFO` file, if it uses Metadata 2.2
     /// or later _and_ none of the required fields (`Requires-Python`, `Requires-Dist`, and
     /// `Provides-Extra`) are marked as dynamic.
-    pub fn parse_pkg_info(content: &[u8]) -> Result<Self, Error> {
+    pub fn parse_pkg_info(content: &[u8]) -> Result<Self, MetadataError> {
         let headers = Headers::parse(content)?;
 
         // To rely on a source distribution's `PKG-INFO` file, the `Metadata-Version` field must be
         // present and set to a value of at least `2.2`.
         let metadata_version = headers
             .get_first_value("Metadata-Version")
-            .ok_or(Error::FieldNotFound("Metadata-Version"))?;
+            .ok_or(MetadataError::FieldNotFound("Metadata-Version"))?;
 
         // Parse the version into (major, minor).
         let (major, minor) = parse_version(&metadata_version)?;
         if (major, minor) < (2, 2) || (major, minor) >= (3, 0) {
-            return Err(Error::UnsupportedMetadataVersion(metadata_version));
+            return Err(MetadataError::UnsupportedMetadataVersion(metadata_version));
         }
 
         // If any of the fields we need are marked as dynamic, we can't use the `PKG-INFO` file.
         let dynamic = headers.get_all_values("Dynamic").collect::<Vec<_>>();
         for field in dynamic {
             match field.as_str() {
-                "Requires-Python" => return Err(Error::DynamicField("Requires-Python")),
-                "Requires-Dist" => return Err(Error::DynamicField("Requires-Dist")),
-                "Provides-Extra" => return Err(Error::DynamicField("Provides-Extra")),
+                "Requires-Python" => return Err(MetadataError::DynamicField("Requires-Python")),
+                "Requires-Dist" => return Err(MetadataError::DynamicField("Requires-Dist")),
+                "Provides-Extra" => return Err(MetadataError::DynamicField("Provides-Extra")),
                 _ => (),
             }
         }
@@ -165,14 +143,14 @@ impl Metadata23 {
         let name = PackageName::new(
             headers
                 .get_first_value("Name")
-                .ok_or(Error::FieldNotFound("Name"))?,
+                .ok_or(MetadataError::FieldNotFound("Name"))?,
         )?;
         let version = Version::from_str(
             &headers
                 .get_first_value("Version")
-                .ok_or(Error::FieldNotFound("Version"))?,
+                .ok_or(MetadataError::FieldNotFound("Version"))?,
         )
-        .map_err(Error::Pep440VersionError)?;
+        .map_err(MetadataError::Pep440VersionError)?;
 
         // The remaining fields are required to be present.
         let requires_dist = headers
@@ -208,29 +186,31 @@ impl Metadata23 {
     }
 
     /// Extract the metadata from a `pyproject.toml` file, as specified in PEP 621.
-    pub fn parse_pyproject_toml(contents: &str) -> Result<Self, Error> {
+    pub fn parse_pyproject_toml(contents: &str) -> Result<Self, MetadataError> {
         let pyproject_toml: PyProjectToml = toml::from_str(contents)?;
 
         let project = pyproject_toml
             .project
-            .ok_or(Error::FieldNotFound("project"))?;
+            .ok_or(MetadataError::FieldNotFound("project"))?;
 
         // If any of the fields we need were declared as dynamic, we can't use the `pyproject.toml` file.
         let dynamic = project.dynamic.unwrap_or_default();
         for field in dynamic {
             match field.as_str() {
-                "dependencies" => return Err(Error::DynamicField("dependencies")),
+                "dependencies" => return Err(MetadataError::DynamicField("dependencies")),
                 "optional-dependencies" => {
-                    return Err(Error::DynamicField("optional-dependencies"))
+                    return Err(MetadataError::DynamicField("optional-dependencies"))
                 }
-                "requires-python" => return Err(Error::DynamicField("requires-python")),
-                "version" => return Err(Error::DynamicField("version")),
+                "requires-python" => return Err(MetadataError::DynamicField("requires-python")),
+                "version" => return Err(MetadataError::DynamicField("version")),
                 _ => (),
             }
         }
 
         let name = project.name;
-        let version = project.version.ok_or(Error::FieldNotFound("version"))?;
+        let version = project
+            .version
+            .ok_or(MetadataError::FieldNotFound("version"))?;
         let requires_python = project.requires_python.map(VersionSpecifiers::from);
 
         // Extract the requirements.
@@ -309,28 +289,31 @@ pub struct Metadata10 {
 
 impl Metadata10 {
     /// Parse the [`Metadata10`] from a `PKG-INFO` file, as included in a source distribution.
-    pub fn parse_pkg_info(content: &[u8]) -> Result<Self, Error> {
+    pub fn parse_pkg_info(content: &[u8]) -> Result<Self, MetadataError> {
         let headers = Headers::parse(content)?;
         let name = PackageName::new(
             headers
                 .get_first_value("Name")
-                .ok_or(Error::FieldNotFound("Name"))?,
+                .ok_or(MetadataError::FieldNotFound("Name"))?,
         )?;
         Ok(Self { name })
     }
 }
 
 /// Parse a `Metadata-Version` field into a (major, minor) tuple.
-fn parse_version(metadata_version: &str) -> Result<(u8, u8), Error> {
-    let (major, minor) = metadata_version
-        .split_once('.')
-        .ok_or(Error::InvalidMetadataVersion(metadata_version.to_string()))?;
+fn parse_version(metadata_version: &str) -> Result<(u8, u8), MetadataError> {
+    let (major, minor) =
+        metadata_version
+            .split_once('.')
+            .ok_or(MetadataError::InvalidMetadataVersion(
+                metadata_version.to_string(),
+            ))?;
     let major = major
         .parse::<u8>()
-        .map_err(|_| Error::InvalidMetadataVersion(metadata_version.to_string()))?;
+        .map_err(|_| MetadataError::InvalidMetadataVersion(metadata_version.to_string()))?;
     let minor = minor
         .parse::<u8>()
-        .map_err(|_| Error::InvalidMetadataVersion(metadata_version.to_string()))?;
+        .map_err(|_| MetadataError::InvalidMetadataVersion(metadata_version.to_string()))?;
     Ok((major, minor))
 }
 
@@ -373,7 +356,7 @@ mod tests {
     use pep440_rs::Version;
     use uv_normalize::PackageName;
 
-    use crate::Error;
+    use crate::MetadataError;
 
     use super::Metadata23;
 
@@ -381,11 +364,11 @@ mod tests {
     fn test_parse_metadata() {
         let s = "Metadata-Version: 1.0";
         let meta = Metadata23::parse_metadata(s.as_bytes());
-        assert!(matches!(meta, Err(Error::FieldNotFound("Name"))));
+        assert!(matches!(meta, Err(MetadataError::FieldNotFound("Name"))));
 
         let s = "Metadata-Version: 1.0\nName: asdf";
         let meta = Metadata23::parse_metadata(s.as_bytes());
-        assert!(matches!(meta, Err(Error::FieldNotFound("Version"))));
+        assert!(matches!(meta, Err(MetadataError::FieldNotFound("Version"))));
 
         let s = "Metadata-Version: 1.0\nName: asdf\nVersion: 1.0";
         let meta = Metadata23::parse_metadata(s.as_bytes()).unwrap();
@@ -404,22 +387,25 @@ mod tests {
 
         let s = "Metadata-Version: 1.0\nName: =?utf-8?q?=C3=A4_space?= <x@y.org>\nVersion: 1.0";
         let meta = Metadata23::parse_metadata(s.as_bytes());
-        assert!(matches!(meta, Err(Error::InvalidName(_))));
+        assert!(matches!(meta, Err(MetadataError::InvalidName(_))));
     }
 
     #[test]
     fn test_parse_pkg_info() {
         let s = "Metadata-Version: 2.1";
         let meta = Metadata23::parse_pkg_info(s.as_bytes());
-        assert!(matches!(meta, Err(Error::UnsupportedMetadataVersion(_))));
+        assert!(matches!(
+            meta,
+            Err(MetadataError::UnsupportedMetadataVersion(_))
+        ));
 
         let s = "Metadata-Version: 2.2\nName: asdf";
         let meta = Metadata23::parse_pkg_info(s.as_bytes());
-        assert!(matches!(meta, Err(Error::FieldNotFound("Version"))));
+        assert!(matches!(meta, Err(MetadataError::FieldNotFound("Version"))));
 
         let s = "Metadata-Version: 2.3\nName: asdf";
         let meta = Metadata23::parse_pkg_info(s.as_bytes());
-        assert!(matches!(meta, Err(Error::FieldNotFound("Version"))));
+        assert!(matches!(meta, Err(MetadataError::FieldNotFound("Version"))));
 
         let s = "Metadata-Version: 2.3\nName: asdf\nVersion: 1.0";
         let meta = Metadata23::parse_pkg_info(s.as_bytes()).unwrap();
@@ -428,7 +414,7 @@ mod tests {
 
         let s = "Metadata-Version: 2.3\nName: asdf\nVersion: 1.0\nDynamic: Requires-Dist";
         let meta = Metadata23::parse_pkg_info(s.as_bytes()).unwrap_err();
-        assert!(matches!(meta, Error::DynamicField("Requires-Dist")));
+        assert!(matches!(meta, MetadataError::DynamicField("Requires-Dist")));
 
         let s = "Metadata-Version: 2.3\nName: asdf\nVersion: 1.0\nRequires-Dist: foo";
         let meta = Metadata23::parse_pkg_info(s.as_bytes()).unwrap();
@@ -444,7 +430,7 @@ mod tests {
             name = "asdf"
         "#;
         let meta = Metadata23::parse_pyproject_toml(s);
-        assert!(matches!(meta, Err(Error::FieldNotFound("version"))));
+        assert!(matches!(meta, Err(MetadataError::FieldNotFound("version"))));
 
         let s = r#"
             [project]
@@ -452,7 +438,7 @@ mod tests {
             dynamic = ["version"]
         "#;
         let meta = Metadata23::parse_pyproject_toml(s);
-        assert!(matches!(meta, Err(Error::DynamicField("version"))));
+        assert!(matches!(meta, Err(MetadataError::DynamicField("version"))));
 
         let s = r#"
             [project]
diff --git a/crates/pypi-types/src/simple_json.rs b/crates/pypi-types/src/simple_json.rs
index 342d54b2b..199b3c7c5 100644
--- a/crates/pypi-types/src/simple_json.rs
+++ b/crates/pypi-types/src/simple_json.rs
@@ -68,11 +68,7 @@ where
     ))
 }
 
-#[derive(
-    Debug, Clone, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize,
-)]
-#[archive(check_bytes)]
-#[archive_attr(derive(Debug))]
+#[derive(Debug, Clone, Deserialize)]
 #[serde(untagged)]
 pub enum DistInfoMetadata {
     Bool(bool),
@@ -125,23 +121,7 @@ impl Default for Yanked {
 /// A dictionary mapping a hash name to a hex encoded digest of the file.
 ///
 /// PEP 691 says multiple hashes can be included and the interpretation is left to the client.
-#[derive(
-    Debug,
-    Clone,
-    Ord,
-    PartialOrd,
-    Eq,
-    PartialEq,
-    Hash,
-    Default,
-    Serialize,
-    Deserialize,
-    rkyv::Archive,
-    rkyv::Deserialize,
-    rkyv::Serialize,
-)]
-#[archive(check_bytes)]
-#[archive_attr(derive(Debug))]
+#[derive(Debug, Clone, Eq, PartialEq, Default, Deserialize)]
 pub struct Hashes {
     pub md5: Option<Box<str>>,
     pub sha256: Option<Box<str>>,
@@ -150,31 +130,34 @@ pub struct Hashes {
 }
 
 impl Hashes {
-    /// Format as `<algorithm>:<hash>`.
-    pub fn to_string(&self) -> Option<String> {
-        self.sha512
-            .as_ref()
-            .map(|sha512| format!("sha512:{sha512}"))
-            .or_else(|| {
-                self.sha384
-                    .as_ref()
-                    .map(|sha384| format!("sha384:{sha384}"))
-            })
-            .or_else(|| {
-                self.sha256
-                    .as_ref()
-                    .map(|sha256| format!("sha256:{sha256}"))
-            })
-            .or_else(|| self.md5.as_ref().map(|md5| format!("md5:{md5}")))
-    }
-
-    /// Return the hash digest.
-    pub fn as_str(&self) -> Option<&str> {
-        self.sha512
-            .as_deref()
-            .or(self.sha384.as_deref())
-            .or(self.sha256.as_deref())
-            .or(self.md5.as_deref())
+    /// Convert a set of [`Hashes`] into a list of [`HashDigest`]s.
+    pub fn into_digests(self) -> Vec<HashDigest> {
+        let mut digests = Vec::new();
+        if let Some(sha512) = self.sha512 {
+            digests.push(HashDigest {
+                algorithm: HashAlgorithm::Sha512,
+                digest: sha512,
+            });
+        }
+        if let Some(sha384) = self.sha384 {
+            digests.push(HashDigest {
+                algorithm: HashAlgorithm::Sha384,
+                digest: sha384,
+            });
+        }
+        if let Some(sha256) = self.sha256 {
+            digests.push(HashDigest {
+                algorithm: HashAlgorithm::Sha256,
+                digest: sha256,
+            });
+        }
+        if let Some(md5) = self.md5 {
+            digests.push(HashDigest {
+                algorithm: HashAlgorithm::Md5,
+                digest: md5,
+            });
+        }
+        digests
     }
 }
 
@@ -239,6 +222,118 @@ impl FromStr for Hashes {
     }
 }
 
+#[derive(
+    Debug,
+    Clone,
+    Copy,
+    Ord,
+    PartialOrd,
+    Eq,
+    PartialEq,
+    Hash,
+    Serialize,
+    Deserialize,
+    rkyv::Archive,
+    rkyv::Deserialize,
+    rkyv::Serialize,
+)]
+#[archive(check_bytes)]
+#[archive_attr(derive(Debug))]
+pub enum HashAlgorithm {
+    Md5,
+    Sha256,
+    Sha384,
+    Sha512,
+}
+
+impl FromStr for HashAlgorithm {
+    type Err = HashError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "md5" => Ok(Self::Md5),
+            "sha256" => Ok(Self::Sha256),
+            "sha384" => Ok(Self::Sha384),
+            "sha512" => Ok(Self::Sha512),
+            _ => Err(HashError::UnsupportedHashAlgorithm(s.to_string())),
+        }
+    }
+}
+
+impl std::fmt::Display for HashAlgorithm {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Md5 => write!(f, "md5"),
+            Self::Sha256 => write!(f, "sha256"),
+            Self::Sha384 => write!(f, "sha384"),
+            Self::Sha512 => write!(f, "sha512"),
+        }
+    }
+}
+
+/// A hash name and hex encoded digest of the file.
+#[derive(
+    Debug,
+    Clone,
+    Ord,
+    PartialOrd,
+    Eq,
+    PartialEq,
+    Hash,
+    Serialize,
+    Deserialize,
+    rkyv::Archive,
+    rkyv::Deserialize,
+    rkyv::Serialize,
+)]
+#[archive(check_bytes)]
+#[archive_attr(derive(Debug))]
+pub struct HashDigest {
+    pub algorithm: HashAlgorithm,
+    pub digest: Box<str>,
+}
+
+impl HashDigest {
+    /// Return the [`HashAlgorithm`] of the digest.
+    pub fn algorithm(&self) -> HashAlgorithm {
+        self.algorithm
+    }
+}
+
+impl std::fmt::Display for HashDigest {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}:{}", self.algorithm, self.digest)
+    }
+}
+
+impl FromStr for HashDigest {
+    type Err = HashError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut parts = s.split(':');
+
+        // Extract the key and value.
+        let name = parts
+            .next()
+            .ok_or_else(|| HashError::InvalidStructure(s.to_string()))?;
+        let value = parts
+            .next()
+            .ok_or_else(|| HashError::InvalidStructure(s.to_string()))?;
+
+        // Ensure there are no more parts.
+        if parts.next().is_some() {
+            return Err(HashError::InvalidStructure(s.to_string()));
+        }
+
+        let algorithm = HashAlgorithm::from_str(name)?;
+
+        Ok(HashDigest {
+            algorithm,
+            digest: value.to_owned().into_boxed_str(),
+        })
+    }
+}
+
 #[derive(thiserror::Error, Debug)]
 pub enum HashError {
     #[error("Unexpected hash (expected `<algorithm>:<hash>`): {0}")]
diff --git a/crates/requirements-txt/Cargo.toml b/crates/requirements-txt/Cargo.toml
index 17c7525b6..0d91710db 100644
--- a/crates/requirements-txt/Cargo.toml
+++ b/crates/requirements-txt/Cargo.toml
@@ -17,7 +17,7 @@ pep508_rs = { workspace = true, features = ["rkyv", "serde", "non-pep508-extensi
 uv-client = { workspace = true }
 uv-fs = { workspace = true }
 uv-normalize = { workspace = true }
-uv-types = { workspace = true }
+uv-configuration = { workspace = true }
 uv-warnings = { workspace = true }
 
 fs-err = { workspace = true }
diff --git a/crates/requirements-txt/src/lib.rs b/crates/requirements-txt/src/lib.rs
index 47968a3e3..8c897289f 100644
--- a/crates/requirements-txt/src/lib.rs
+++ b/crates/requirements-txt/src/lib.rs
@@ -52,9 +52,9 @@ use pep508_rs::{
 #[cfg(feature = "http")]
 use uv_client::BaseClient;
 use uv_client::BaseClientBuilder;
+use uv_configuration::{NoBinary, NoBuild, PackageNameSpecifier};
 use uv_fs::{normalize_url_path, Simplified};
 use uv_normalize::ExtraName;
-use uv_types::{NoBinary, NoBuild, PackageNameSpecifier};
 use uv_warnings::warn_user;
 
 /// We emit one of those for each requirements.txt entry
@@ -293,21 +293,16 @@ impl Display for EditableRequirement {
 
 /// A [Requirement] with additional metadata from the requirements.txt, currently only hashes but in
 /// the future also editable an similar information
-#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Serialize)]
+#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Hash, Serialize)]
 pub struct RequirementEntry {
     /// The actual PEP 508 requirement
     pub requirement: RequirementsTxtRequirement,
     /// Hashes of the downloadable packages
     pub hashes: Vec<String>,
-    /// Editable installation, see e.g. <https://stackoverflow.com/q/35064426/3549270>
-    pub editable: bool,
 }
 
 impl Display for RequirementEntry {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        if self.editable {
-            write!(f, "-e ")?;
-        }
         write!(f, "{}", self.requirement)?;
         for hash in &self.hashes {
             write!(f, " --hash {hash}")?;
@@ -670,7 +665,6 @@ fn parse_entry(
         RequirementsTxtStatement::RequirementEntry(RequirementEntry {
             requirement,
             hashes,
-            editable: false,
         })
     } else if let Some(char) = s.peek() {
         let (line, column) = calculate_row_column(content, s.cursor());
@@ -1743,7 +1737,6 @@ mod test {
                         },
                     ),
                     hashes: [],
-                    editable: false,
                 },
             ],
             constraints: [],
@@ -1798,7 +1791,6 @@ mod test {
                         },
                     ),
                     hashes: [],
-                    editable: false,
                 },
             ],
             constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-basic.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-basic.txt.snap
index aeefa208a..1ea308583 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-basic.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-basic.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -77,7 +75,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -102,7 +99,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -127,7 +123,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -152,7 +147,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-a.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-a.txt.snap
index 3bae2fc6f..eed853303 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-a.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-a.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-b.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-b.txt.snap
index 8c311f4b9..2ac70d195 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-b.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-constraints-b.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-editable.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-editable.txt.snap
index e8a8a5090..ede00ad21 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-editable.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-editable.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -57,7 +56,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-for-poetry.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-for-poetry.txt.snap
index 513d09259..ff6db6eab 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-for-poetry.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-for-poetry.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -66,7 +64,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -99,7 +96,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-a.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-a.txt.snap
index f14751af9..82edeab41 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-a.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-a.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -41,7 +40,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-b.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-b.txt.snap
index 07f69a01f..745bacabc 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-b.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-include-b.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-poetry-with-hashes.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-poetry-with-hashes.txt.snap
index 318f3047d..25e816bb5 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-poetry-with-hashes.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-poetry-with-hashes.txt.snap
@@ -56,7 +56,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:2e1ccc9417d4da358b9de6f174e3ac094391ea1d4fbef2d667865d819dfd0afe",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -110,7 +109,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:8a388717b9476f934a21484e8c8e61875ab60644d29b9b39e11e4b9dc1c6b305",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -175,7 +173,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:e4d039def5768a47e4afec8e89e83ec3ae5a26bf00ad851f914d1240b444d2b1",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -230,7 +227,6 @@ RequirementsTxt {
                 "sha256:2577c501a2fb8d05a304c09d090d6e47c306fef15809d102b327cf8364bddab5",
                 "sha256:75beac4a47881eeb94d5ea5d6ad31ef88856affe2332b9aafb52c6452ccf0d7a",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -287,7 +283,6 @@ RequirementsTxt {
                 "sha256:1a5c7d7d577e0eabfcf15eb87d1e19314c8c4f0e722a301f98e0e3a65e238b4e",
                 "sha256:1e5a38aa85bd660c53947bd28aeaafb6a97d70423606f1ccb044a03a1203fe4a",
             ],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-small.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-small.txt.snap
index 717c063d4..bc4cb551f 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-small.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-small.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-whitespace.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-whitespace.txt.snap
index e8a8a5090..ede00ad21 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-whitespace.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__line-endings-whitespace.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -57,7 +56,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-basic.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-basic.txt.snap
index aeefa208a..1ea308583 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-basic.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-basic.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -77,7 +75,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -102,7 +99,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -127,7 +123,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -152,7 +147,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-a.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-a.txt.snap
index 3bae2fc6f..eed853303 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-a.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-a.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-b.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-b.txt.snap
index 8c311f4b9..2ac70d195 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-b.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-constraints-b.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-for-poetry.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-for-poetry.txt.snap
index 513d09259..ff6db6eab 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-for-poetry.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-for-poetry.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -66,7 +64,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -99,7 +96,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-a.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-a.txt.snap
index f14751af9..82edeab41 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-a.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-a.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -41,7 +40,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-b.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-b.txt.snap
index 07f69a01f..745bacabc 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-b.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-include-b.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-poetry-with-hashes.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-poetry-with-hashes.txt.snap
index 318f3047d..25e816bb5 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-poetry-with-hashes.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-poetry-with-hashes.txt.snap
@@ -56,7 +56,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:2e1ccc9417d4da358b9de6f174e3ac094391ea1d4fbef2d667865d819dfd0afe",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -110,7 +109,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:8a388717b9476f934a21484e8c8e61875ab60644d29b9b39e11e4b9dc1c6b305",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -175,7 +173,6 @@ RequirementsTxt {
             hashes: [
                 "sha256:e4d039def5768a47e4afec8e89e83ec3ae5a26bf00ad851f914d1240b444d2b1",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -230,7 +227,6 @@ RequirementsTxt {
                 "sha256:2577c501a2fb8d05a304c09d090d6e47c306fef15809d102b327cf8364bddab5",
                 "sha256:75beac4a47881eeb94d5ea5d6ad31ef88856affe2332b9aafb52c6452ccf0d7a",
             ],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -287,7 +283,6 @@ RequirementsTxt {
                 "sha256:1a5c7d7d577e0eabfcf15eb87d1e19314c8c4f0e722a301f98e0e3a65e238b4e",
                 "sha256:1e5a38aa85bd660c53947bd28aeaafb6a97d70423606f1ccb044a03a1203fe4a",
             ],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-small.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-small.txt.snap
index 717c063d4..bc4cb551f 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-small.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-small.txt.snap
@@ -27,7 +27,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -52,7 +51,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-unix-bare-url.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-unix-bare-url.txt.snap
index 1e71a4be4..6ebf240d1 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-unix-bare-url.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-unix-bare-url.txt.snap
@@ -28,7 +28,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Unnamed(
@@ -58,7 +57,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Unnamed(
@@ -84,7 +82,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-whitespace.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-whitespace.txt.snap
index e8a8a5090..ede00ad21 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-whitespace.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-whitespace.txt.snap
@@ -16,7 +16,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Pep508(
@@ -57,7 +56,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-windows-bare-url.txt.snap b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-windows-bare-url.txt.snap
index d78405047..0f05ef8ea 100644
--- a/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-windows-bare-url.txt.snap
+++ b/crates/requirements-txt/src/snapshots/requirements_txt__test__parse-windows-bare-url.txt.snap
@@ -28,7 +28,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Unnamed(
@@ -58,7 +57,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
         RequirementEntry {
             requirement: Unnamed(
@@ -84,7 +82,6 @@ RequirementsTxt {
                 },
             ),
             hashes: [],
-            editable: false,
         },
     ],
     constraints: [],
diff --git a/crates/uv-auth/Cargo.toml b/crates/uv-auth/Cargo.toml
index 0e4851fe1..87677f03d 100644
--- a/crates/uv-auth/Cargo.toml
+++ b/crates/uv-auth/Cargo.toml
@@ -7,15 +7,15 @@ edition = "2021"
 async-trait = { workspace = true }
 base64 = { workspace = true }
 clap = { workspace = true, features = ["derive", "env"], optional = true }
+http = { workspace = true }
+once_cell = { workspace = true }
 reqwest = { workspace = true }
 reqwest-middleware = { workspace = true }
 rust-netrc = { workspace = true }
-task-local-extensions = { workspace = true }
 thiserror = { workspace = true }
 tracing = { workspace = true }
 url = { workspace = true }
 urlencoding = { workspace = true }
-once_cell = { workspace = true }
 
 [dev-dependencies]
 tempfile = { workspace = true }
diff --git a/crates/uv-auth/src/middleware.rs b/crates/uv-auth/src/middleware.rs
index d21ca7847..5d5e14c4a 100644
--- a/crates/uv-auth/src/middleware.rs
+++ b/crates/uv-auth/src/middleware.rs
@@ -1,9 +1,9 @@
+use http::Extensions;
 use std::path::Path;
 
 use netrc::Netrc;
 use reqwest::{header::HeaderValue, Request, Response};
 use reqwest_middleware::{Middleware, Next};
-use task_local_extensions::Extensions;
 use tracing::{debug, warn};
 
 use crate::{
diff --git a/crates/uv-build/Cargo.toml b/crates/uv-build/Cargo.toml
index 1bfb137d7..2d8f70278 100644
--- a/crates/uv-build/Cargo.toml
+++ b/crates/uv-build/Cargo.toml
@@ -20,6 +20,7 @@ pep508_rs = { workspace = true }
 uv-fs = { workspace = true }
 uv-interpreter = { workspace = true }
 uv-types = { workspace = true, features = ["serde"] }
+uv-configuration = { workspace = true, features = ["serde"] }
 uv-virtualenv = { workspace = true }
 
 anyhow = { workspace = true }
diff --git a/crates/uv-build/src/lib.rs b/crates/uv-build/src/lib.rs
index 0606c371f..7d8ff3795 100644
--- a/crates/uv-build/src/lib.rs
+++ b/crates/uv-build/src/lib.rs
@@ -28,11 +28,10 @@ use tracing::{debug, info_span, instrument, Instrument};
 use distribution_types::Resolution;
 use pep440_rs::Version;
 use pep508_rs::{PackageName, Requirement};
+use uv_configuration::{BuildKind, ConfigSettings, SetupPyStrategy};
 use uv_fs::{PythonExt, Simplified};
 use uv_interpreter::{Interpreter, PythonEnvironment};
-use uv_types::{
-    BuildContext, BuildIsolation, BuildKind, ConfigSettings, SetupPyStrategy, SourceBuildTrait,
-};
+use uv_types::{BuildContext, BuildIsolation, SourceBuildTrait};
 
 /// e.g. `pygraphviz/graphviz_wrap.c:3020:10: fatal error: graphviz/cgraph.h: No such file or directory`
 static MISSING_HEADER_RE: Lazy<Regex> = Lazy::new(|| {
@@ -113,7 +112,7 @@ pub enum MissingLibrary {
 #[derive(Debug, Error)]
 pub struct MissingHeaderCause {
     missing_library: MissingLibrary,
-    package_id: String,
+    version_id: String,
 }
 
 impl Display for MissingHeaderCause {
@@ -123,22 +122,22 @@ impl Display for MissingHeaderCause {
                 write!(
                     f,
                     "This error likely indicates that you need to install a library that provides \"{}\" for {}",
-                    header, self.package_id
+                    header, self.version_id
                 )
             }
             MissingLibrary::Linker(library) => {
                 write!(
                     f,
                     "This error likely indicates that you need to install the library that provides a shared library \
-                    for {library} for {package_id} (e.g. lib{library}-dev)",
-                    library = library, package_id = self.package_id
+                    for {library} for {version_id} (e.g. lib{library}-dev)",
+                    library = library, version_id = self.version_id
                 )
             }
             MissingLibrary::PythonPackage(package) => {
                 write!(
                     f,
-                    "This error likely indicates that you need to `uv pip install {package}` into the build environment for {package_id}",
-                    package = package, package_id = self.package_id
+                    "This error likely indicates that you need to `uv pip install {package}` into the build environment for {version_id}",
+                    package = package, version_id = self.version_id
                 )
             }
         }
@@ -149,7 +148,7 @@ impl Error {
     fn from_command_output(
         message: String,
         output: &Output,
-        package_id: impl Into<String>,
+        version_id: impl Into<String>,
     ) -> Self {
         let stdout = String::from_utf8_lossy(&output.stdout).trim().to_string();
         let stderr = String::from_utf8_lossy(&output.stderr).trim().to_string();
@@ -179,7 +178,7 @@ impl Error {
                 stderr,
                 missing_header_cause: MissingHeaderCause {
                     missing_library,
-                    package_id: package_id.into(),
+                    version_id: version_id.into(),
                 },
             };
         }
@@ -365,7 +364,7 @@ pub struct SourceBuild {
     /// > it created.
     metadata_directory: Option<PathBuf>,
     /// Package id such as `foo-1.2.3`, for error reporting
-    package_id: String,
+    version_id: String,
     /// Whether we do a regular PEP 517 build or an PEP 660 editable build
     build_kind: BuildKind,
     /// Modified PATH that contains the `venv_bin`, `user_path` and `system_path` variables in that order
@@ -386,7 +385,7 @@ impl SourceBuild {
         interpreter: &Interpreter,
         build_context: &impl BuildContext,
         source_build_context: SourceBuildContext,
-        package_id: String,
+        version_id: String,
         setup_py: SetupPyStrategy,
         config_settings: ConfigSettings,
         build_isolation: BuildIsolation<'_>,
@@ -478,7 +477,7 @@ impl SourceBuild {
                     &venv,
                     pep517_backend,
                     build_context,
-                    &package_id,
+                    &version_id,
                     build_kind,
                     &config_settings,
                     &environment_variables,
@@ -498,7 +497,7 @@ impl SourceBuild {
             build_kind,
             config_settings,
             metadata_directory: None,
-            package_id,
+            version_id,
             environment_variables,
             modified_path,
         })
@@ -696,7 +695,7 @@ impl SourceBuild {
             return Err(Error::from_command_output(
                 "Build backend failed to determine metadata through `prepare_metadata_for_build_wheel`".to_string(),
                 &output,
-                &self.package_id,
+                &self.version_id,
             ));
         }
 
@@ -715,8 +714,8 @@ impl SourceBuild {
     /// dir.
     ///
     /// <https://packaging.python.org/en/latest/specifications/source-distribution-format/>
-    #[instrument(skip_all, fields(package_id = self.package_id))]
-    pub async fn build(&self, wheel_dir: &Path) -> Result<String, Error> {
+    #[instrument(skip_all, fields(version_id = self.version_id))]
+    pub async fn build_wheel(&self, wheel_dir: &Path) -> Result<String, Error> {
         // The build scripts run with the extracted root as cwd, so they need the absolute path.
         let wheel_dir = fs::canonicalize(wheel_dir)?;
 
@@ -751,7 +750,7 @@ impl SourceBuild {
                 return Err(Error::from_command_output(
                     "Failed building wheel through setup.py".to_string(),
                     &output,
-                    &self.package_id,
+                    &self.version_id,
                 ));
             }
             let dist = fs::read_dir(self.source_tree.join("dist"))?;
@@ -762,7 +761,7 @@ impl SourceBuild {
                         "Expected exactly wheel in `dist/` after invoking setup.py, found {dist_dir:?}"
                     ),
                     &output,
-                    &self.package_id)
+                    &self.version_id)
                 );
             };
 
@@ -832,7 +831,7 @@ impl SourceBuild {
                     self.build_kind
                 ),
                 &output,
-                &self.package_id,
+                &self.version_id,
             ));
         }
 
@@ -844,7 +843,7 @@ impl SourceBuild {
                     self.build_kind
                 ),
                 &output,
-                &self.package_id,
+                &self.version_id,
             ));
         }
         Ok(distribution_filename)
@@ -857,7 +856,7 @@ impl SourceBuildTrait for SourceBuild {
     }
 
     async fn wheel<'a>(&'a self, wheel_dir: &'a Path) -> anyhow::Result<String> {
-        Ok(self.build(wheel_dir).await?)
+        Ok(self.build_wheel(wheel_dir).await?)
     }
 }
 
@@ -874,7 +873,7 @@ async fn create_pep517_build_environment(
     venv: &PythonEnvironment,
     pep517_backend: &Pep517Backend,
     build_context: &impl BuildContext,
-    package_id: &str,
+    version_id: &str,
     build_kind: BuildKind,
     config_settings: &ConfigSettings,
     environment_variables: &FxHashMap<OsString, OsString>,
@@ -928,7 +927,7 @@ async fn create_pep517_build_environment(
         return Err(Error::from_command_output(
             format!("Build backend failed to determine extra requires with `build_{build_kind}()`"),
             &output,
-            package_id,
+            version_id,
         ));
     }
 
@@ -939,7 +938,7 @@ async fn create_pep517_build_environment(
                 "Build backend failed to read extra requires from `get_requires_for_build_{build_kind}`: {err}"
             ),
             &output,
-            package_id,
+            version_id,
         )
     })?;
 
@@ -950,7 +949,7 @@ async fn create_pep517_build_environment(
                 "Build backend failed to return extra requires with `get_requires_for_build_{build_kind}`: {err}"
             ),
             &output,
-            package_id,
+            version_id,
         )
     })?;
 
diff --git a/crates/uv-cache/src/archive.rs b/crates/uv-cache/src/archive.rs
new file mode 100644
index 000000000..31243f25c
--- /dev/null
+++ b/crates/uv-cache/src/archive.rs
@@ -0,0 +1,24 @@
+use std::path::Path;
+
+/// A unique identifier for an archive (unzipped wheel) in the cache.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct ArchiveId(String);
+
+impl Default for ArchiveId {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl ArchiveId {
+    /// Generate a new unique identifier for an archive.
+    pub fn new() -> Self {
+        Self(nanoid::nanoid!())
+    }
+}
+
+impl AsRef<Path> for ArchiveId {
+    fn as_ref(&self) -> &Path {
+        self.0.as_ref()
+    }
+}
diff --git a/crates/uv-cache/src/lib.rs b/crates/uv-cache/src/lib.rs
index 6aaea35a1..5c07c3902 100644
--- a/crates/uv-cache/src/lib.rs
+++ b/crates/uv-cache/src/lib.rs
@@ -23,7 +23,9 @@ use crate::removal::{rm_rf, Removal};
 pub use crate::timestamp::Timestamp;
 pub use crate::wheel::WheelCache;
 use crate::wheel::WheelCacheKind;
+pub use archive::ArchiveId;
 
+mod archive;
 mod by_timestamp;
 #[cfg(feature = "clap")]
 mod cli;
@@ -71,6 +73,12 @@ impl CacheEntry {
     }
 }
 
+impl AsRef<Path> for CacheEntry {
+    fn as_ref(&self) -> &Path {
+        &self.0
+    }
+}
+
 /// A subdirectory within the cache.
 #[derive(Debug, Clone)]
 pub struct CacheShard(PathBuf);
@@ -167,6 +175,11 @@ impl Cache {
         CacheEntry::new(self.bucket(cache_bucket).join(dir), file)
     }
 
+    /// Return the path to an archive in the cache.
+    pub fn archive(&self, id: &ArchiveId) -> PathBuf {
+        self.bucket(CacheBucket::Archive).join(id)
+    }
+
     /// Returns `true` if a cache entry must be revalidated given the [`Refresh`] policy.
     pub fn must_revalidate(&self, package: &PackageName) -> bool {
         match &self.refresh {
@@ -208,18 +221,18 @@ impl Cache {
         }
     }
 
-    /// Persist a temporary directory to the artifact store.
+    /// Persist a temporary directory to the artifact store, returning its unique ID.
     pub async fn persist(
         &self,
         temp_dir: impl AsRef<Path>,
         path: impl AsRef<Path>,
-    ) -> io::Result<PathBuf> {
+    ) -> io::Result<ArchiveId> {
         // Create a unique ID for the artifact.
         // TODO(charlie): Support content-addressed persistence via SHAs.
-        let id = nanoid::nanoid!();
+        let id = ArchiveId::new();
 
         // Move the temporary directory into the directory store.
-        let archive_entry = self.entry(CacheBucket::Archive, "", id);
+        let archive_entry = self.entry(CacheBucket::Archive, "", &id);
         fs_err::create_dir_all(archive_entry.dir())?;
         uv_fs::rename_with_retry(temp_dir.as_ref(), archive_entry.path()).await?;
 
@@ -227,7 +240,7 @@ impl Cache {
         fs_err::create_dir_all(path.as_ref().parent().expect("Cache entry to have parent"))?;
         uv_fs::replace_symlink(archive_entry.path(), path.as_ref())?;
 
-        Ok(archive_entry.into_path_buf())
+        Ok(id)
     }
 
     /// Initialize a directory for use as a cache.
@@ -594,12 +607,12 @@ pub enum CacheBucket {
 impl CacheBucket {
     fn to_str(self) -> &'static str {
         match self {
-            Self::BuiltWheels => "built-wheels-v2",
+            Self::BuiltWheels => "built-wheels-v3",
             Self::FlatIndex => "flat-index-v0",
             Self::Git => "git-v0",
             Self::Interpreter => "interpreter-v0",
-            Self::Simple => "simple-v6",
-            Self::Wheels => "wheels-v0",
+            Self::Simple => "simple-v7",
+            Self::Wheels => "wheels-v1",
             Self::Archive => "archive-v0",
         }
     }
@@ -795,6 +808,12 @@ impl ArchiveTimestamp {
         }
     }
 
+    /// Return the modification timestamp for a file.
+    pub fn from_file(path: impl AsRef<Path>) -> Result<Self, io::Error> {
+        let metadata = fs_err::metadata(path.as_ref())?;
+        Ok(Self::Exact(Timestamp::from_metadata(&metadata)))
+    }
+
     /// Return the modification timestamp for an archive.
     pub fn timestamp(&self) -> Timestamp {
         match self {
diff --git a/crates/uv-client/Cargo.toml b/crates/uv-client/Cargo.toml
index 0d89d290b..bd8b7521d 100644
--- a/crates/uv-client/Cargo.toml
+++ b/crates/uv-client/Cargo.toml
@@ -11,13 +11,14 @@ install-wheel-rs = { workspace = true }
 pep440_rs = { workspace = true }
 pep508_rs = { workspace = true }
 platform-tags = { workspace = true }
+pypi-types = { workspace = true }
 uv-auth = { workspace = true }
 uv-cache = { workspace = true }
+uv-configuration = { workspace = true }
 uv-fs = { workspace = true, features = ["tokio"] }
 uv-normalize = { workspace = true }
 uv-version = { workspace = true }
 uv-warnings = { workspace = true }
-pypi-types = { workspace = true }
 
 anyhow = { workspace = true }
 async-trait = { workspace = true }
@@ -33,11 +34,9 @@ reqwest-middleware = { workspace = true }
 reqwest-retry = { workspace = true }
 rkyv = { workspace = true }
 rmp-serde = { workspace = true }
-rustc-hash = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 sys-info = { workspace = true }
-task-local-extensions = { workspace = true }
 tempfile = { workspace = true }
 thiserror = { workspace = true }
 tl = { workspace = true }
@@ -47,14 +46,10 @@ tracing = { workspace = true }
 url = { workspace = true }
 urlencoding = { workspace = true }
 
-# These must be kept in-sync with those used by `reqwest`.
-rustls = { version = "0.21.10" }
-rustls-native-certs = { version = "0.6.3" }
-webpki-roots = { version = "0.25.4" }
-
 [dev-dependencies]
 anyhow = { workspace = true }
-hyper = { version = "0.14.28", features = ["server", "http1"] }
-insta = { version = "1.36.1" }
-os_info = { version = "3.7.0", default-features = false }
+http-body-util = { version = "0.1.0" }
+hyper = { version = "1.2.0", features = ["server", "http1"] }
+hyper-util = { version = "0.1.3", features = ["tokio"] }
+insta = { version = "1.36.1" , features = ["filters", "json", "redactions"] }
 tokio = { workspace = true, features = ["fs", "macros"] }
diff --git a/crates/uv-client/src/base_client.rs b/crates/uv-client/src/base_client.rs
index c8a9f424d..fffcf0848 100644
--- a/crates/uv-client/src/base_client.rs
+++ b/crates/uv-client/src/base_client.rs
@@ -16,10 +16,9 @@ use uv_warnings::warn_user_once;
 
 use crate::linehaul::LineHaul;
 use crate::middleware::OfflineMiddleware;
-use crate::tls::Roots;
-use crate::{tls, Connectivity};
+use crate::Connectivity;
 
-/// A builder for an [`RegistryClient`].
+/// A builder for an [`BaseClient`].
 #[derive(Debug, Clone)]
 pub struct BaseClientBuilder<'a> {
     keyring_provider: KeyringProvider,
@@ -140,19 +139,20 @@ impl<'a> BaseClientBuilder<'a> {
                 }
                 path_exists
             });
-            // Load the TLS configuration.
-            let tls = tls::load(if self.native_tls || ssl_cert_file_exists {
-                Roots::Native
-            } else {
-                Roots::Webpki
-            })
-            .expect("Failed to load TLS configuration.");
 
+            // Configure the builder.
             let client_core = ClientBuilder::new()
                 .user_agent(user_agent_string)
                 .pool_max_idle_per_host(20)
                 .timeout(std::time::Duration::from_secs(timeout))
-                .use_preconfigured_tls(tls);
+                .tls_built_in_root_certs(false);
+
+            // Configure TLS.
+            let client_core = if self.native_tls || ssl_cert_file_exists {
+                client_core.tls_built_in_native_certs(true)
+            } else {
+                client_core.tls_built_in_webpki_certs(true)
+            };
 
             client_core.build().expect("Failed to build HTTP client.")
         });
diff --git a/crates/uv-client/src/cached_client.rs b/crates/uv-client/src/cached_client.rs
index a80726e8b..672785328 100644
--- a/crates/uv-client/src/cached_client.rs
+++ b/crates/uv-client/src/cached_client.rs
@@ -299,6 +299,34 @@ impl CachedClient {
         }
     }
 
+    /// Make a request without checking whether the cache is fresh.
+    pub async fn skip_cache<
+        Payload: Serialize + DeserializeOwned + Send + 'static,
+        CallBackError,
+        Callback,
+        CallbackReturn,
+    >(
+        &self,
+        req: Request,
+        cache_entry: &CacheEntry,
+        response_callback: Callback,
+    ) -> Result<Payload, CachedClientError<CallBackError>>
+    where
+        Callback: FnOnce(Response) -> CallbackReturn + Send,
+        CallbackReturn: Future<Output = Result<Payload, CallBackError>> + Send,
+    {
+        let (response, cache_policy) = self.fresh_request(req).await?;
+
+        let payload = self
+            .run_response_callback(cache_entry, cache_policy, response, move |resp| async {
+                let payload = response_callback(resp).await?;
+                Ok(SerdeCacheable { inner: payload })
+            })
+            .await?;
+
+        Ok(payload)
+    }
+
     async fn resend_and_heal_cache<Payload: Cacheable, CallBackError, Callback, CallbackReturn>(
         &self,
         req: Request,
diff --git a/crates/uv-client/src/error.rs b/crates/uv-client/src/error.rs
index 38bc66bad..af69e27a0 100644
--- a/crates/uv-client/src/error.rs
+++ b/crates/uv-client/src/error.rs
@@ -132,7 +132,7 @@ pub enum ErrorKind {
 
     /// Dist-info error
     #[error(transparent)]
-    InstallWheel(#[from] install_wheel_rs::Error),
+    DistInfo(#[from] install_wheel_rs::Error),
 
     #[error("{0} isn't available locally, but making network requests to registries was banned.")]
     NoIndex(String),
@@ -146,7 +146,11 @@ pub enum ErrorKind {
 
     /// The metadata file could not be parsed.
     #[error("Couldn't parse metadata of {0} from {1}")]
-    MetadataParseError(WheelFilename, String, #[source] Box<pypi_types::Error>),
+    MetadataParseError(
+        WheelFilename,
+        String,
+        #[source] Box<pypi_types::MetadataError>,
+    ),
 
     /// The metadata file was not found in the wheel.
     #[error("Metadata file `{0}` was not found in {1}")]
diff --git a/crates/uv-client/src/flat_index.rs b/crates/uv-client/src/flat_index.rs
index a042f4f10..a468cc640 100644
--- a/crates/uv-client/src/flat_index.rs
+++ b/crates/uv-client/src/flat_index.rs
@@ -1,24 +1,14 @@
-use std::collections::btree_map::Entry;
-use std::collections::BTreeMap;
 use std::path::PathBuf;
 
 use futures::{FutureExt, StreamExt};
 use reqwest::Response;
-use rustc_hash::FxHashMap;
-use tracing::{debug, info_span, instrument, warn, Instrument};
+use tracing::{debug, info_span, warn, Instrument};
 use url::Url;
 
 use distribution_filename::DistFilename;
-use distribution_types::{
-    BuiltDist, Dist, File, FileLocation, FlatIndexLocation, IndexUrl, PrioritizedDist,
-    RegistryBuiltDist, RegistrySourceDist, SourceDist, SourceDistCompatibility,
-};
-use pep440_rs::Version;
+use distribution_types::{File, FileLocation, FlatIndexLocation, IndexUrl};
 use pep508_rs::VerbatimUrl;
-use platform_tags::Tags;
-use pypi_types::Hashes;
 use uv_cache::{Cache, CacheBucket};
-use uv_normalize::PackageName;
 
 use crate::cached_client::{CacheControl, CachedClientError};
 use crate::html::SimpleHtml;
@@ -36,10 +26,10 @@ pub enum FlatIndexError {
 #[derive(Debug, Default, Clone)]
 pub struct FlatIndexEntries {
     /// The list of `--find-links` entries.
-    entries: Vec<(DistFilename, File, IndexUrl)>,
+    pub entries: Vec<(DistFilename, File, IndexUrl)>,
     /// Whether any `--find-links` entries could not be resolved due to a lack of network
     /// connectivity.
-    offline: bool,
+    pub offline: bool,
 }
 
 impl FlatIndexEntries {
@@ -215,7 +205,7 @@ impl<'a> FlatIndexClient<'a> {
     fn read_from_directory(path: &PathBuf) -> Result<FlatIndexEntries, std::io::Error> {
         // Absolute paths are required for the URL conversion.
         let path = fs_err::canonicalize(path)?;
-        let index_url = IndexUrl::Url(VerbatimUrl::from_path(&path));
+        let index_url = IndexUrl::Path(VerbatimUrl::from_path(&path));
 
         let mut dists = Vec::new();
         for entry in fs_err::read_dir(path)? {
@@ -234,9 +224,9 @@ impl<'a> FlatIndexClient<'a> {
             };
 
             let file = File {
-                dist_info_metadata: None,
+                dist_info_metadata: false,
                 filename: filename.to_string(),
-                hashes: Hashes::default(),
+                hashes: Vec::new(),
                 requires_python: None,
                 size: None,
                 upload_time_utc_ms: None,
@@ -256,132 +246,3 @@ impl<'a> FlatIndexClient<'a> {
         Ok(FlatIndexEntries::from_entries(dists))
     }
 }
-
-/// A set of [`PrioritizedDist`] from a `--find-links` entry, indexed by [`PackageName`]
-/// and [`Version`].
-#[derive(Debug, Clone, Default)]
-pub struct FlatIndex {
-    /// The list of [`FlatDistributions`] from the `--find-links` entries, indexed by package name.
-    index: FxHashMap<PackageName, FlatDistributions>,
-    /// Whether any `--find-links` entries could not be resolved due to a lack of network
-    /// connectivity.
-    offline: bool,
-}
-
-impl FlatIndex {
-    /// Collect all files from a `--find-links` target into a [`FlatIndex`].
-    #[instrument(skip_all)]
-    pub fn from_entries(entries: FlatIndexEntries, tags: &Tags) -> Self {
-        // Collect compatible distributions.
-        let mut index = FxHashMap::default();
-        for (filename, file, url) in entries.entries {
-            let distributions = index.entry(filename.name().clone()).or_default();
-            Self::add_file(distributions, file, filename, tags, url);
-        }
-
-        // Collect offline entries.
-        let offline = entries.offline;
-
-        Self { index, offline }
-    }
-
-    fn add_file(
-        distributions: &mut FlatDistributions,
-        file: File,
-        filename: DistFilename,
-        tags: &Tags,
-        index: IndexUrl,
-    ) {
-        // No `requires-python` here: for source distributions, we don't have that information;
-        // for wheels, we read it lazily only when selected.
-        match filename {
-            DistFilename::WheelFilename(filename) => {
-                let compatibility = filename.compatibility(tags);
-                let version = filename.version.clone();
-
-                let dist = Dist::Built(BuiltDist::Registry(RegistryBuiltDist {
-                    filename,
-                    file: Box::new(file),
-                    index,
-                }));
-                match distributions.0.entry(version) {
-                    Entry::Occupied(mut entry) => {
-                        entry
-                            .get_mut()
-                            .insert_built(dist, None, compatibility.into());
-                    }
-                    Entry::Vacant(entry) => {
-                        entry.insert(PrioritizedDist::from_built(
-                            dist,
-                            None,
-                            compatibility.into(),
-                        ));
-                    }
-                }
-            }
-            DistFilename::SourceDistFilename(filename) => {
-                let dist = Dist::Source(SourceDist::Registry(RegistrySourceDist {
-                    filename: filename.clone(),
-                    file: Box::new(file),
-                    index,
-                }));
-                match distributions.0.entry(filename.version) {
-                    Entry::Occupied(mut entry) => {
-                        entry.get_mut().insert_source(
-                            dist,
-                            None,
-                            SourceDistCompatibility::Compatible,
-                        );
-                    }
-                    Entry::Vacant(entry) => {
-                        entry.insert(PrioritizedDist::from_source(
-                            dist,
-                            None,
-                            SourceDistCompatibility::Compatible,
-                        ));
-                    }
-                }
-            }
-        }
-    }
-
-    /// Get the [`FlatDistributions`] for the given package name.
-    pub fn get(&self, package_name: &PackageName) -> Option<&FlatDistributions> {
-        self.index.get(package_name)
-    }
-
-    /// Returns `true` if there are any offline `--find-links` entries.
-    pub fn offline(&self) -> bool {
-        self.offline
-    }
-}
-
-/// A set of [`PrioritizedDist`] from a `--find-links` entry for a single package, indexed
-/// by [`Version`].
-#[derive(Debug, Clone, Default)]
-pub struct FlatDistributions(BTreeMap<Version, PrioritizedDist>);
-
-impl FlatDistributions {
-    pub fn iter(&self) -> impl Iterator<Item = (&Version, &PrioritizedDist)> {
-        self.0.iter()
-    }
-
-    pub fn remove(&mut self, version: &Version) -> Option<PrioritizedDist> {
-        self.0.remove(version)
-    }
-}
-
-impl IntoIterator for FlatDistributions {
-    type Item = (Version, PrioritizedDist);
-    type IntoIter = std::collections::btree_map::IntoIter<Version, PrioritizedDist>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.0.into_iter()
-    }
-}
-
-impl From<FlatDistributions> for BTreeMap<Version, PrioritizedDist> {
-    fn from(distributions: FlatDistributions) -> Self {
-        distributions.0
-    }
-}
diff --git a/crates/uv-client/src/html.rs b/crates/uv-client/src/html.rs
index 2bffce9b6..5d315c6d4 100644
--- a/crates/uv-client/src/html.rs
+++ b/crates/uv-client/src/html.rs
@@ -164,6 +164,9 @@ impl SimpleHtml {
             .last()
             .ok_or_else(|| Error::MissingFilename(href.to_string()))?;
 
+        // Strip any query string from the filename.
+        let filename = filename.split('?').next().unwrap_or(filename);
+
         // Unquote the filename.
         let filename = urlencoding::decode(filename)
             .map_err(|_| Error::UnsupportedFilename(filename.to_string()))?;
@@ -681,6 +684,60 @@ mod tests {
         "###);
     }
 
+    #[test]
+    fn parse_query_string() {
+        let text = r#"
+<!DOCTYPE html>
+<html>
+  <body>
+    <h1>Links for jinja2</h1>
+    <a href="/whl/Jinja2-3.1.2-py3-none-any.whl?project=legacy">Jinja2-3.1.2-py3-none-any.whl</a><br/>
+  </body>
+</html>
+<!--TIMESTAMP 1703347410-->
+        "#;
+        let base = Url::parse("https://download.pytorch.org/whl/jinja2/").unwrap();
+        let result = SimpleHtml::parse(text, &base).unwrap();
+        insta::assert_debug_snapshot!(result, @r###"
+        SimpleHtml {
+            base: BaseUrl(
+                Url {
+                    scheme: "https",
+                    cannot_be_a_base: false,
+                    username: "",
+                    password: None,
+                    host: Some(
+                        Domain(
+                            "download.pytorch.org",
+                        ),
+                    ),
+                    port: None,
+                    path: "/whl/jinja2/",
+                    query: None,
+                    fragment: None,
+                },
+            ),
+            files: [
+                File {
+                    dist_info_metadata: None,
+                    filename: "Jinja2-3.1.2-py3-none-any.whl",
+                    hashes: Hashes {
+                        md5: None,
+                        sha256: None,
+                        sha384: None,
+                        sha512: None,
+                    },
+                    requires_python: None,
+                    size: None,
+                    upload_time: None,
+                    url: "/whl/Jinja2-3.1.2-py3-none-any.whl?project=legacy",
+                    yanked: None,
+                },
+            ],
+        }
+        "###);
+    }
+
     #[test]
     fn parse_missing_hash_value() {
         let text = r#"
diff --git a/crates/uv-client/src/lib.rs b/crates/uv-client/src/lib.rs
index 62fef2313..24f842d8e 100644
--- a/crates/uv-client/src/lib.rs
+++ b/crates/uv-client/src/lib.rs
@@ -1,7 +1,7 @@
 pub use base_client::{BaseClient, BaseClientBuilder};
 pub use cached_client::{CacheControl, CachedClient, CachedClientError, DataWithCachePolicy};
 pub use error::{BetterReqwestError, Error, ErrorKind};
-pub use flat_index::{FlatDistributions, FlatIndex, FlatIndexClient, FlatIndexError};
+pub use flat_index::{FlatIndexClient, FlatIndexEntries, FlatIndexError};
 pub use linehaul::LineHaul;
 pub use registry_client::{
     Connectivity, RegistryClient, RegistryClientBuilder, SimpleMetadata, SimpleMetadatum,
@@ -20,4 +20,3 @@ mod middleware;
 mod registry_client;
 mod remote_metadata;
 mod rkyvutil;
-mod tls;
diff --git a/crates/uv-client/src/middleware.rs b/crates/uv-client/src/middleware.rs
index e83d45547..37b991b3b 100644
--- a/crates/uv-client/src/middleware.rs
+++ b/crates/uv-client/src/middleware.rs
@@ -1,8 +1,8 @@
+use http::Extensions;
 use std::fmt::Debug;
 
 use reqwest::{Request, Response};
 use reqwest_middleware::{Middleware, Next};
-use task_local_extensions::Extensions;
 use url::Url;
 
 /// A custom error type for the offline middleware.
diff --git a/crates/uv-client/src/registry_client.rs b/crates/uv-client/src/registry_client.rs
index 8ae51f6b2..5873058e0 100644
--- a/crates/uv-client/src/registry_client.rs
+++ b/crates/uv-client/src/registry_client.rs
@@ -9,7 +9,7 @@ use http::HeaderMap;
 use reqwest::{Client, Response, StatusCode};
 use serde::{Deserialize, Serialize};
 use tokio::io::AsyncReadExt;
-use tokio_util::compat::FuturesAsyncReadCompatExt;
+use tokio_util::compat::{FuturesAsyncReadCompatExt, TokioAsyncReadCompatExt};
 use tracing::{info_span, instrument, trace, warn, Instrument};
 use url::Url;
 
@@ -22,6 +22,7 @@ use platform_tags::Platform;
 use pypi_types::{Metadata23, SimpleJson};
 use uv_auth::KeyringProvider;
 use uv_cache::{Cache, CacheBucket, WheelCache};
+use uv_configuration::IndexStrategy;
 use uv_normalize::PackageName;
 
 use crate::base_client::{BaseClient, BaseClientBuilder};
@@ -35,6 +36,7 @@ use crate::{CachedClient, CachedClientError, Error, ErrorKind};
 #[derive(Debug, Clone)]
 pub struct RegistryClientBuilder<'a> {
     index_urls: IndexUrls,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     native_tls: bool,
     retries: u32,
@@ -49,6 +51,7 @@ impl RegistryClientBuilder<'_> {
     pub fn new(cache: Cache) -> Self {
         Self {
             index_urls: IndexUrls::default(),
+            index_strategy: IndexStrategy::default(),
             keyring_provider: KeyringProvider::default(),
             native_tls: false,
             cache,
@@ -68,6 +71,12 @@ impl<'a> RegistryClientBuilder<'a> {
         self
     }
 
+    #[must_use]
+    pub fn index_strategy(mut self, index_strategy: IndexStrategy) -> Self {
+        self.index_strategy = index_strategy;
+        self
+    }
+
     #[must_use]
     pub fn keyring_provider(mut self, keyring_provider: KeyringProvider) -> Self {
         self.keyring_provider = keyring_provider;
@@ -147,6 +156,7 @@ impl<'a> RegistryClientBuilder<'a> {
 
         RegistryClient {
             index_urls: self.index_urls,
+            index_strategy: self.index_strategy,
             cache: self.cache,
             connectivity,
             client,
@@ -160,6 +170,8 @@ impl<'a> RegistryClientBuilder<'a> {
 pub struct RegistryClient {
     /// The index URLs to use for fetching packages.
     index_urls: IndexUrls,
+    /// The strategy to use when fetching across multiple indexes.
+    index_strategy: IndexStrategy,
     /// The underlying HTTP client.
     client: CachedClient,
     /// Used for the remote wheel METADATA cache.
@@ -206,17 +218,23 @@ impl RegistryClient {
     pub async fn simple(
         &self,
         package_name: &PackageName,
-    ) -> Result<(IndexUrl, OwnedArchive<SimpleMetadata>), Error> {
+    ) -> Result<Vec<(IndexUrl, OwnedArchive<SimpleMetadata>)>, Error> {
         let mut it = self.index_urls.indexes().peekable();
         if it.peek().is_none() {
             return Err(ErrorKind::NoIndex(package_name.as_ref().to_string()).into());
         }
 
+        let mut results = Vec::new();
         for index in it {
-            let result = self.simple_single_index(package_name, index).await?;
+            match self.simple_single_index(package_name, index).await? {
+                Ok(metadata) => {
+                    results.push((index.clone(), metadata));
 
-            return match result {
-                Ok(metadata) => Ok((index.clone(), metadata)),
+                    // If we're only using the first match, we can stop here.
+                    if self.index_strategy == IndexStrategy::FirstMatch {
+                        break;
+                    }
+                }
                 Err(CachedClientError::Client(err)) => match err.into_kind() {
                     ErrorKind::Offline(_) => continue,
                     ErrorKind::ReqwestError(err) => {
@@ -225,20 +243,24 @@ impl RegistryClient {
                         {
                             continue;
                         }
-                        Err(ErrorKind::from(err).into())
+                        return Err(ErrorKind::from(err).into());
                     }
-                    other => Err(other.into()),
+                    other => return Err(other.into()),
                 },
-                Err(CachedClientError::Callback(err)) => Err(err),
+                Err(CachedClientError::Callback(err)) => return Err(err),
             };
         }
 
-        match self.connectivity {
-            Connectivity::Online => {
-                Err(ErrorKind::PackageNotFound(package_name.to_string()).into())
-            }
-            Connectivity::Offline => Err(ErrorKind::Offline(package_name.to_string()).into()),
+        if results.is_empty() {
+            return match self.connectivity {
+                Connectivity::Online => {
+                    Err(ErrorKind::PackageNotFound(package_name.to_string()).into())
+                }
+                Connectivity::Offline => Err(ErrorKind::Offline(package_name.to_string()).into()),
+            };
         }
+
+        Ok(results)
     }
 
     async fn simple_single_index(
@@ -263,6 +285,7 @@ impl RegistryClient {
             Path::new(&match index {
                 IndexUrl::Pypi(_) => "pypi".to_string(),
                 IndexUrl::Url(url) => cache_key::digest(&cache_key::CanonicalUrl::new(url)),
+                IndexUrl::Path(url) => cache_key::digest(&cache_key::CanonicalUrl::new(url)),
             }),
             format!("{package_name}.rkyv"),
         );
@@ -402,11 +425,7 @@ impl RegistryClient {
     ) -> Result<Metadata23, Error> {
         // If the metadata file is available at its own url (PEP 658), download it from there.
         let filename = WheelFilename::from_str(&file.filename).map_err(ErrorKind::WheelFilename)?;
-        if file
-            .dist_info_metadata
-            .as_ref()
-            .is_some_and(pypi_types::DistInfoMetadata::is_available)
-        {
+        if file.dist_info_metadata {
             let mut url = url.clone();
             url.set_path(&format!("{}.metadata", url.path()));
 
@@ -596,7 +615,8 @@ async fn read_metadata_async_seek(
     debug_source: String,
     reader: impl tokio::io::AsyncRead + tokio::io::AsyncSeek + Unpin,
 ) -> Result<Metadata23, Error> {
-    let mut zip_reader = async_zip::tokio::read::seek::ZipFileReader::with_tokio(reader)
+    let reader = futures::io::BufReader::new(reader.compat());
+    let mut zip_reader = async_zip::base::read::seek::ZipFileReader::new(reader)
         .await
         .map_err(|err| ErrorKind::Zip(filename.clone(), err))?;
 
@@ -609,7 +629,7 @@ async fn read_metadata_async_seek(
             .enumerate()
             .filter_map(|(index, entry)| Some((index, entry.filename().as_str().ok()?))),
     )
-    .map_err(ErrorKind::InstallWheel)?;
+    .map_err(ErrorKind::DistInfo)?;
 
     // Read the contents of the `METADATA` file.
     let mut contents = Vec::new();
@@ -633,6 +653,7 @@ async fn read_metadata_async_stream<R: futures::AsyncRead + Unpin>(
     debug_source: String,
     reader: R,
 ) -> Result<Metadata23, Error> {
+    let reader = futures::io::BufReader::with_capacity(128 * 1024, reader);
     let mut zip = async_zip::base::read::stream::ZipFileReader::new(reader);
 
     while let Some(mut entry) = zip
diff --git a/crates/uv-client/src/remote_metadata.rs b/crates/uv-client/src/remote_metadata.rs
index 548968e2f..954212588 100644
--- a/crates/uv-client/src/remote_metadata.rs
+++ b/crates/uv-client/src/remote_metadata.rs
@@ -1,5 +1,5 @@
 use async_http_range_reader::AsyncHttpRangeReader;
-use async_zip::tokio::read::seek::ZipFileReader;
+use futures::io::BufReader;
 use tokio_util::compat::TokioAsyncReadCompatExt;
 
 use distribution_filename::WheelFilename;
@@ -61,7 +61,8 @@ pub(crate) async fn wheel_metadata_from_remote_zip(
         .await;
 
     // Construct a zip reader to uses the stream.
-    let mut reader = ZipFileReader::new(reader.compat())
+    let buf = BufReader::new(reader.compat());
+    let mut reader = async_zip::base::read::seek::ZipFileReader::new(buf)
         .await
         .map_err(|err| ErrorKind::Zip(filename.clone(), err))?;
 
@@ -74,7 +75,7 @@ pub(crate) async fn wheel_metadata_from_remote_zip(
             .enumerate()
             .filter_map(|(idx, e)| Some(((idx, e), e.filename().as_str().ok()?))),
     )
-    .map_err(ErrorKind::InstallWheel)?;
+    .map_err(ErrorKind::DistInfo)?;
 
     let offset = metadata_entry.header_offset();
     let size = metadata_entry.compressed_size()
@@ -90,6 +91,7 @@ pub(crate) async fn wheel_metadata_from_remote_zip(
     reader
         .inner_mut()
         .get_mut()
+        .get_mut()
         .prefetch(offset..offset + size)
         .await;
 
diff --git a/crates/uv-client/src/tls.rs b/crates/uv-client/src/tls.rs
deleted file mode 100644
index 7118a4c05..000000000
--- a/crates/uv-client/src/tls.rs
+++ /dev/null
@@ -1,102 +0,0 @@
-use rustls::ClientConfig;
-use tracing::warn;
-
-#[derive(thiserror::Error, Debug)]
-pub(crate) enum TlsError {
-    #[error(transparent)]
-    Rustls(#[from] rustls::Error),
-    #[error("zero valid certificates found in native root store")]
-    ZeroCertificates,
-    #[error("failed to load native root certificates")]
-    NativeCertificates(#[source] std::io::Error),
-}
-
-#[derive(Debug, Clone, Copy)]
-pub(crate) enum Roots {
-    /// Use reqwest's `rustls-tls-webpki-roots` behavior for loading root certificates.
-    Webpki,
-    /// Use reqwest's `rustls-tls-native-roots` behavior for loading root certificates.
-    Native,
-}
-
-/// Initialize a TLS configuration for the client.
-///
-/// This is equivalent to the TLS initialization `reqwest` when `rustls-tls` is enabled,
-/// with two notable changes:
-///
-/// 1. It enables _either_ the `webpki-roots` or the `native-certs` feature, but not both.
-/// 2. It assumes the following builder settings (which match the defaults):
-///    - `root_certs: vec![]`
-///    - `min_tls_version: None`
-///    - `max_tls_version: None`
-///    - `identity: None`
-///    - `certs_verification: false`
-///    - `tls_sni: true`
-///    - `http_version_pref: HttpVersionPref::All`
-///
-/// See: <https://github.com/seanmonstar/reqwest/blob/e3192638518d577759dd89da489175b8f992b12f/src/async_impl/client.rs#L498>
-pub(crate) fn load(roots: Roots) -> Result<ClientConfig, TlsError> {
-    // Set root certificates.
-    let mut root_cert_store = rustls::RootCertStore::empty();
-
-    match roots {
-        Roots::Webpki => {
-            // Use `rustls-tls-webpki-roots`
-            use rustls::OwnedTrustAnchor;
-
-            let trust_anchors = webpki_roots::TLS_SERVER_ROOTS.iter().map(|trust_anchor| {
-                OwnedTrustAnchor::from_subject_spki_name_constraints(
-                    trust_anchor.subject,
-                    trust_anchor.spki,
-                    trust_anchor.name_constraints,
-                )
-            });
-
-            root_cert_store.add_trust_anchors(trust_anchors);
-        }
-        Roots::Native => {
-            // Use: `rustls-tls-native-roots`
-            let mut valid_count = 0;
-            let mut invalid_count = 0;
-            for cert in
-                rustls_native_certs::load_native_certs().map_err(TlsError::NativeCertificates)?
-            {
-                let cert = rustls::Certificate(cert.0);
-                // Continue on parsing errors, as native stores often include ancient or syntactically
-                // invalid certificates, like root certificates without any X509 extensions.
-                // Inspiration: https://github.com/rustls/rustls/blob/633bf4ba9d9521a95f68766d04c22e2b01e68318/rustls/src/anchors.rs#L105-L112
-                match root_cert_store.add(&cert) {
-                    Ok(_) => valid_count += 1,
-                    Err(err) => {
-                        invalid_count += 1;
-                        warn!(
-                            "rustls failed to parse DER certificate {:?} {:?}",
-                            &err, &cert
-                        );
-                    }
-                }
-            }
-            if valid_count == 0 && invalid_count > 0 {
-                return Err(TlsError::ZeroCertificates);
-            }
-        }
-    }
-
-    // Build TLS config
-    let config_builder = ClientConfig::builder()
-        .with_safe_default_cipher_suites()
-        .with_safe_default_kx_groups()
-        .with_protocol_versions(rustls::ALL_VERSIONS)?
-        .with_root_certificates(root_cert_store);
-
-    // Finalize TLS config
-    let mut tls = config_builder.with_no_client_auth();
-
-    // Enable SNI
-    tls.enable_sni = true;
-
-    // ALPN protocol
-    tls.alpn_protocols = vec!["h2".into(), "http/1.1".into()];
-
-    Ok(tls)
-}
diff --git a/crates/uv-client/tests/netrc_auth.rs b/crates/uv-client/tests/netrc_auth.rs
index 4678f176b..8d657169f 100644
--- a/crates/uv-client/tests/netrc_auth.rs
+++ b/crates/uv-client/tests/netrc_auth.rs
@@ -3,10 +3,13 @@ use std::io::Write;
 
 use anyhow::Result;
 use futures::future;
-use hyper::header::AUTHORIZATION;
-use hyper::server::conn::Http;
+use http::header::AUTHORIZATION;
+use http_body_util::Full;
+use hyper::body::Bytes;
+use hyper::server::conn::http1;
 use hyper::service::service_fn;
-use hyper::{Body, Request, Response};
+use hyper::{Request, Response};
+use hyper_util::rt::TokioIo;
 use tempfile::NamedTempFile;
 use tokio::net::TcpListener;
 
@@ -21,7 +24,7 @@ async fn test_client_with_netrc_credentials() -> Result<()> {
 
     // Spawn the server loop in a background task
     tokio::spawn(async move {
-        let svc = service_fn(move |req: Request<Body>| {
+        let svc = service_fn(move |req: Request<hyper::body::Incoming>| {
             // Get User Agent Header and send it back in the response
             let auth = req
                 .headers()
@@ -29,16 +32,19 @@ async fn test_client_with_netrc_credentials() -> Result<()> {
                 .and_then(|v| v.to_str().ok())
                 .map(|s| s.to_string())
                 .unwrap_or_default(); // Empty Default
-            future::ok::<_, hyper::Error>(Response::new(Body::from(auth)))
+            future::ok::<_, hyper::Error>(Response::new(Full::new(Bytes::from(auth))))
         });
-        // Start Hyper Server
+        // Start Server (not wrapped in loop {} since we want a single response server)
+        // If you want server to accept multiple connections, wrap it in loop {}
         let (socket, _) = listener.accept().await.unwrap();
-        Http::new()
-            .http1_keep_alive(false)
-            .serve_connection(socket, svc)
-            .with_upgrades()
-            .await
-            .expect("Server Started");
+        let socket = TokioIo::new(socket);
+        tokio::task::spawn(async move {
+            http1::Builder::new()
+                .serve_connection(socket, svc)
+                .with_upgrades()
+                .await
+                .expect("Server Started");
+        });
     });
 
     // Create a netrc file
diff --git a/crates/uv-client/tests/user_agent_version.rs b/crates/uv-client/tests/user_agent_version.rs
index 6058ec929..2dd67f5f9 100644
--- a/crates/uv-client/tests/user_agent_version.rs
+++ b/crates/uv-client/tests/user_agent_version.rs
@@ -1,9 +1,13 @@
 use anyhow::Result;
 use futures::future;
+use http_body_util::Full;
+use hyper::body::Bytes;
 use hyper::header::USER_AGENT;
-use hyper::server::conn::Http;
+use hyper::server::conn::http1;
 use hyper::service::service_fn;
-use hyper::{Body, Request, Response};
+use hyper::{Request, Response};
+use hyper_util::rt::TokioIo;
+use insta::{assert_json_snapshot, assert_snapshot, with_settings};
 use pep508_rs::{MarkerEnvironment, StringVersion};
 use platform_tags::{Arch, Os, Platform};
 use tokio::net::TcpListener;
@@ -19,8 +23,8 @@ async fn test_user_agent_has_version() -> Result<()> {
     let addr = listener.local_addr()?;
 
     // Spawn the server loop in a background task
-    tokio::spawn(async move {
-        let svc = service_fn(move |req: Request<Body>| {
+    let server_task = tokio::spawn(async move {
+        let svc = service_fn(move |req: Request<hyper::body::Incoming>| {
             // Get User Agent Header and send it back in the response
             let user_agent = req
                 .headers()
@@ -28,16 +32,19 @@ async fn test_user_agent_has_version() -> Result<()> {
                 .and_then(|v| v.to_str().ok())
                 .map(|s| s.to_string())
                 .unwrap_or_default(); // Empty Default
-            future::ok::<_, hyper::Error>(Response::new(Body::from(user_agent)))
+            future::ok::<_, hyper::Error>(Response::new(Full::new(Bytes::from(user_agent))))
         });
-        // Start Hyper Server
+        // Start Server (not wrapped in loop {} since we want a single response server)
+        // If you want server to accept multiple connections, wrap it in loop {}
         let (socket, _) = listener.accept().await.unwrap();
-        Http::new()
-            .http1_keep_alive(false)
-            .serve_connection(socket, svc)
-            .with_upgrades()
-            .await
-            .expect("Server Started");
+        let socket = TokioIo::new(socket);
+        tokio::task::spawn(async move {
+            http1::Builder::new()
+                .serve_connection(socket, svc)
+                .with_upgrades()
+                .await
+                .expect("Server Started");
+        });
     });
 
     // Initialize uv-client
@@ -46,7 +53,8 @@ async fn test_user_agent_has_version() -> Result<()> {
 
     // Send request to our dummy server
     let res = client
-        .uncached_client()
+        .cached_client()
+        .uncached()
         .get(format!("http://{addr}"))
         .send()
         .await?;
@@ -60,6 +68,9 @@ async fn test_user_agent_has_version() -> Result<()> {
     // Verify body matches regex
     assert_eq!(body, format!("uv/{}", version()));
 
+    // Wait for the server task to complete, to be a good citizen.
+    server_task.await?;
+
     Ok(())
 }
 
@@ -70,8 +81,8 @@ async fn test_user_agent_has_linehaul() -> Result<()> {
     let addr = listener.local_addr()?;
 
     // Spawn the server loop in a background task
-    tokio::spawn(async move {
-        let svc = service_fn(move |req: Request<Body>| {
+    let server_task = tokio::spawn(async move {
+        let svc = service_fn(move |req: Request<hyper::body::Incoming>| {
             // Get User Agent Header and send it back in the response
             let user_agent = req
                 .headers()
@@ -79,16 +90,19 @@ async fn test_user_agent_has_linehaul() -> Result<()> {
                 .and_then(|v| v.to_str().ok())
                 .map(|s| s.to_string())
                 .unwrap_or_default(); // Empty Default
-            future::ok::<_, hyper::Error>(Response::new(Body::from(user_agent)))
+            future::ok::<_, hyper::Error>(Response::new(Full::new(Bytes::from(user_agent))))
         });
-        // Start Hyper Server
+        // Start Server (not wrapped in loop {} since we want a single response server)
+        // If you want server to accept multiple connections, wrap it in loop {}
         let (socket, _) = listener.accept().await.unwrap();
-        Http::new()
-            .http1_keep_alive(false)
-            .serve_connection(socket, svc)
-            .with_upgrades()
-            .await
-            .expect("Server Started");
+        let socket = TokioIo::new(socket);
+        tokio::task::spawn(async move {
+            http1::Builder::new()
+                .serve_connection(socket, svc)
+                .with_upgrades()
+                .await
+                .expect("Server Started");
+        });
     });
 
     // Add some representative markers for an Ubuntu CI runner
@@ -142,7 +156,8 @@ async fn test_user_agent_has_linehaul() -> Result<()> {
 
     // Send request to our dummy server
     let res = client
-        .uncached_client()
+        .cached_client()
+        .uncached()
         .get(format!("http://{addr}"))
         .send()
         .await?;
@@ -153,6 +168,9 @@ async fn test_user_agent_has_linehaul() -> Result<()> {
     // Check User Agent
     let body = res.text().await?;
 
+    // Wait for the server task to complete, to be a good citizen.
+    server_task.await?;
+
     // Unpack User-Agent with linehaul
     let (uv_version, uv_linehaul) = body
         .split_once(' ')
@@ -161,62 +179,82 @@ async fn test_user_agent_has_linehaul() -> Result<()> {
     // Deserializing Linehaul
     let linehaul: LineHaul = serde_json::from_str(uv_linehaul)?;
 
-    // Assert uv version
-    assert_eq!(uv_version, format!("uv/{}", version()));
-
-    // Assert linehaul
-    let installer_info = linehaul.installer.unwrap();
-    let system_info = linehaul.system.unwrap();
-    let impl_info = linehaul.implementation.unwrap();
-
-    assert_eq!(installer_info.name.unwrap(), "uv".to_string());
-    assert_eq!(installer_info.version.unwrap(), version());
-
-    assert_eq!(system_info.name.unwrap(), markers.platform_system);
-    assert_eq!(system_info.release.unwrap(), markers.platform_release);
-
-    assert_eq!(
-        impl_info.name.unwrap(),
-        markers.platform_python_implementation
-    );
-    assert_eq!(
-        impl_info.version.unwrap(),
-        markers.python_full_version.version.to_string()
-    );
-
-    assert_eq!(
-        linehaul.python.unwrap(),
-        markers.python_full_version.version.to_string()
-    );
-    assert_eq!(linehaul.cpu.unwrap(), markers.platform_machine);
-
-    assert_eq!(linehaul.openssl_version, None);
-    assert_eq!(linehaul.setuptools_version, None);
-    assert_eq!(linehaul.rustc_version, None);
+    // Assert linehaul user agent
+    let filters = vec![(version(), "[VERSION]")];
+    with_settings!({
+        filters => filters
+    }, {
+        // Assert uv version
+        assert_snapshot!(uv_version, @"uv/[VERSION]");
+        // Assert linehaul json
+        assert_json_snapshot!(&linehaul, {
+            ".distro" => "[distro]",
+            ".ci" => "[ci]"
+        }, @r###"
+        {
+          "installer": {
+            "name": "uv",
+            "version": "[VERSION]"
+          },
+          "python": "3.12.2",
+          "implementation": {
+            "name": "CPython",
+            "version": "3.12.2"
+          },
+          "distro": "[distro]",
+          "system": {
+            "name": "Linux",
+            "release": "6.5.0-1016-azure"
+          },
+          "cpu": "x86_64",
+          "openssl_version": null,
+          "setuptools_version": null,
+          "rustc_version": null,
+          "ci": "[ci]"
+        }
+        "###);
+    });
 
+    // Assert distro
     if cfg!(windows) {
-        assert_eq!(linehaul.distro, None);
+        assert_json_snapshot!(&linehaul.distro, @"null");
     } else if cfg!(target_os = "linux") {
-        // Using `os_info` to confirm our values are as expected in Linux
-        let info = os_info::get();
-        let Some(distro_info) = linehaul.distro else {
-            panic!("got no distro, but expected one in linehaul")
-        };
-        assert_eq!(distro_info.id.as_deref(), info.codename());
-        if let Some(ref name) = distro_info.name {
-            assert_eq!(name, &info.os_type().to_string());
-        }
-        if let Some(ref version) = distro_info.version {
-            assert_eq!(version, &info.version().to_string());
-        }
-        assert!(distro_info.libc.is_some());
+        assert_json_snapshot!(&linehaul.distro, {
+            ".id" => "[distro.id]",
+            ".name" => "[distro.name]",
+            ".version" => "[distro.version]"
+            // We mock the libc version already
+        }, @r###"
+            {
+              "name": "[distro.name]",
+              "version": "[distro.version]",
+              "id": "[distro.id]",
+              "libc": {
+                "lib": "glibc",
+                "version": "2.38"
+              }
+            }"###
+        );
+        // Check dynamic values
+        let distro_info = linehaul
+            .distro
+            .expect("got no distro, but expected one in linehaul");
+        // Gather distribution info from /etc/os-release.
+        let release_info = sys_info::linux_os_release()
+            .expect("got no os release info, but expected one in linux");
+        assert_eq!(distro_info.id, release_info.version_codename);
+        assert_eq!(distro_info.name, release_info.name);
+        assert_eq!(distro_info.version, release_info.version_id);
     } else if cfg!(target_os = "macos") {
-        // We mock the macOS version
-        let distro_info = linehaul.distro.unwrap();
-        assert_eq!(distro_info.id, None);
-        assert_eq!(distro_info.name.unwrap(), "macOS");
-        assert_eq!(distro_info.version, Some("14.4".to_string()));
-        assert_eq!(distro_info.libc, None);
+        // We mock the macOS distro
+        assert_json_snapshot!(&linehaul.distro, @r###"
+            {
+              "name": "macOS",
+              "version": "14.4",
+              "id": null,
+              "libc": null
+            }"###
+        );
     }
 
     Ok(())
diff --git a/crates/uv-configuration/Cargo.toml b/crates/uv-configuration/Cargo.toml
new file mode 100644
index 000000000..8a176161e
--- /dev/null
+++ b/crates/uv-configuration/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "uv-configuration"
+version = "0.0.1"
+edition = { workspace = true }
+rust-version = { workspace = true }
+homepage = { workspace = true }
+documentation = { workspace = true }
+repository = { workspace = true }
+authors = { workspace = true }
+license = { workspace = true }
+
+[lints]
+workspace = true
+
+[dependencies]
+pep508_rs = { workspace = true }
+uv-normalize = { workspace = true }
+
+anyhow = { workspace = true }
+clap = { workspace = true, features = ["derive"], optional = true }
+itertools = { workspace = true }
+rustc-hash = { workspace = true }
+serde = { workspace = true, optional = true }
+serde_json = { workspace = true, optional = true }
+
+[features]
+default = []
+serde = ["dep:serde", "dep:serde_json"]
diff --git a/crates/uv-types/src/build_options.rs b/crates/uv-configuration/src/build_options.rs
similarity index 87%
rename from crates/uv-types/src/build_options.rs
rename to crates/uv-configuration/src/build_options.rs
index 81b646576..14c8677a7 100644
--- a/crates/uv-types/src/build_options.rs
+++ b/crates/uv-configuration/src/build_options.rs
@@ -1,24 +1,9 @@
 use std::fmt::{Display, Formatter};
 
 use pep508_rs::PackageName;
-use uv_interpreter::PythonEnvironment;
 
 use crate::{PackageNameSpecifier, PackageNameSpecifiers};
 
-/// Whether to enforce build isolation when building source distributions.
-#[derive(Debug, Copy, Clone)]
-pub enum BuildIsolation<'a> {
-    Isolated,
-    Shared(&'a PythonEnvironment),
-}
-
-impl<'a> BuildIsolation<'a> {
-    /// Returns `true` if build isolation is enforced.
-    pub fn is_isolated(&self) -> bool {
-        matches!(self, Self::Isolated)
-    }
-}
-
 /// The strategy to use when building source distributions that lack a `pyproject.toml`.
 #[derive(Copy, Clone, Debug, Default, PartialEq, Eq)]
 pub enum SetupPyStrategy {
@@ -211,6 +196,29 @@ impl NoBuild {
     }
 }
 
+#[derive(Debug, Default, Clone, Hash, Eq, PartialEq)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
+pub enum IndexStrategy {
+    /// Only use results from the first index that returns a match for a given package name.
+    ///
+    /// While this differs from pip's behavior, it's the default index strategy as it's the most
+    /// secure.
+    #[default]
+    FirstMatch,
+    /// Search for every package name across all indexes, exhausting the versions from the first
+    /// index before moving on to the next.
+    ///
+    /// In this strategy, we look for every package across all indexes. When resolving, we attempt
+    /// to use versions from the indexes in order, such that we exhaust all available versions from
+    /// the first index before moving on to the next. Further, if a version is found to be
+    /// incompatible in the first index, we do not reconsider that version in subsequent indexes,
+    /// even if the secondary index might contain compatible versions (e.g., variants of the same
+    /// versions with different ABI tags or Python version constraints).
+    ///
+    /// See: https://peps.python.org/pep-0708/
+    UnsafeAnyMatch,
+}
+
 #[cfg(test)]
 mod tests {
     use std::str::FromStr;
diff --git a/crates/uv-types/src/config_settings.rs b/crates/uv-configuration/src/config_settings.rs
similarity index 99%
rename from crates/uv-types/src/config_settings.rs
rename to crates/uv-configuration/src/config_settings.rs
index 7b0729aeb..c7cefc64a 100644
--- a/crates/uv-types/src/config_settings.rs
+++ b/crates/uv-configuration/src/config_settings.rs
@@ -40,6 +40,7 @@ enum ConfigSettingValue {
 ///
 /// See: <https://peps.python.org/pep-0517/#config-settings>
 #[derive(Debug, Default, Clone)]
+#[cfg_attr(not(feature = "serde"), allow(dead_code))]
 pub struct ConfigSettings(BTreeMap<String, ConfigSettingValue>);
 
 impl FromIterator<ConfigSettingEntry> for ConfigSettings {
diff --git a/crates/uv-types/src/constraints.rs b/crates/uv-configuration/src/constraints.rs
similarity index 100%
rename from crates/uv-types/src/constraints.rs
rename to crates/uv-configuration/src/constraints.rs
diff --git a/crates/uv-configuration/src/lib.rs b/crates/uv-configuration/src/lib.rs
new file mode 100644
index 000000000..665568f2b
--- /dev/null
+++ b/crates/uv-configuration/src/lib.rs
@@ -0,0 +1,13 @@
+pub use build_options::*;
+pub use config_settings::*;
+pub use constraints::*;
+pub use name_specifiers::*;
+pub use overrides::*;
+pub use package_options::*;
+
+mod build_options;
+mod config_settings;
+mod constraints;
+mod name_specifiers;
+mod overrides;
+mod package_options;
diff --git a/crates/uv-types/src/name_specifiers.rs b/crates/uv-configuration/src/name_specifiers.rs
similarity index 100%
rename from crates/uv-types/src/name_specifiers.rs
rename to crates/uv-configuration/src/name_specifiers.rs
diff --git a/crates/uv-types/src/overrides.rs b/crates/uv-configuration/src/overrides.rs
similarity index 100%
rename from crates/uv-types/src/overrides.rs
rename to crates/uv-configuration/src/overrides.rs
diff --git a/crates/uv-types/src/package_options.rs b/crates/uv-configuration/src/package_options.rs
similarity index 100%
rename from crates/uv-types/src/package_options.rs
rename to crates/uv-configuration/src/package_options.rs
diff --git a/crates/uv-dev/Cargo.toml b/crates/uv-dev/Cargo.toml
index 7ad14c089..7f9d323c7 100644
--- a/crates/uv-dev/Cargo.toml
+++ b/crates/uv-dev/Cargo.toml
@@ -23,11 +23,14 @@ pep508_rs = { workspace = true }
 uv-build = { workspace = true }
 uv-cache = { workspace = true, features = ["clap"] }
 uv-client = { workspace = true }
+uv-configuration = { workspace = true }
 uv-dispatch = { workspace = true }
+uv-fs = { workspace = true }
 uv-installer = { workspace = true }
 uv-interpreter = { workspace = true }
 uv-normalize = { workspace = true }
 uv-resolver = { workspace = true }
+uv-toolchain = { workspace = true }
 uv-types = { workspace = true }
 
 # Any dependencies that are exclusively used in `uv-dev` should be listed as non-workspace
diff --git a/crates/uv-dev/src/build.rs b/crates/uv-dev/src/build.rs
index 0a49a0883..ae6095086 100644
--- a/crates/uv-dev/src/build.rs
+++ b/crates/uv-dev/src/build.rs
@@ -9,14 +9,12 @@ use distribution_types::IndexLocations;
 use rustc_hash::FxHashMap;
 use uv_build::{SourceBuild, SourceBuildContext};
 use uv_cache::{Cache, CacheArgs};
-use uv_client::{FlatIndex, RegistryClientBuilder};
+use uv_client::RegistryClientBuilder;
+use uv_configuration::{BuildKind, ConfigSettings, NoBinary, NoBuild, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_interpreter::PythonEnvironment;
-use uv_resolver::InMemoryIndex;
-use uv_types::NoBinary;
-use uv_types::{
-    BuildContext, BuildIsolation, BuildKind, ConfigSettings, InFlight, NoBuild, SetupPyStrategy,
-};
+use uv_resolver::{FlatIndex, InMemoryIndex};
+use uv_types::{BuildContext, BuildIsolation, InFlight};
 
 #[derive(Parser)]
 pub(crate) struct BuildArgs {
@@ -93,5 +91,5 @@ pub(crate) async fn build(args: BuildArgs) -> Result<PathBuf> {
         FxHashMap::default(),
     )
     .await?;
-    Ok(wheel_dir.join(builder.build(&wheel_dir).await?))
+    Ok(wheel_dir.join(builder.build_wheel(&wheel_dir).await?))
 }
diff --git a/crates/uv-dev/src/fetch_python.rs b/crates/uv-dev/src/fetch_python.rs
new file mode 100644
index 000000000..cdbdfcea0
--- /dev/null
+++ b/crates/uv-dev/src/fetch_python.rs
@@ -0,0 +1,142 @@
+use anyhow::Result;
+use clap::Parser;
+use fs_err as fs;
+#[cfg(unix)]
+use fs_err::tokio::symlink;
+use futures::StreamExt;
+#[cfg(unix)]
+use itertools::Itertools;
+use std::str::FromStr;
+#[cfg(unix)]
+use std::{collections::HashMap, path::PathBuf};
+use tokio::time::Instant;
+use tracing::{info, info_span, Instrument};
+
+use uv_fs::Simplified;
+use uv_toolchain::{
+    DownloadResult, Error, PythonDownload, PythonDownloadRequest, TOOLCHAIN_DIRECTORY,
+};
+
+#[derive(Parser, Debug)]
+pub(crate) struct FetchPythonArgs {
+    versions: Vec<String>,
+}
+
+pub(crate) async fn fetch_python(args: FetchPythonArgs) -> Result<()> {
+    let start = Instant::now();
+
+    let bootstrap_dir = &*TOOLCHAIN_DIRECTORY;
+
+    fs_err::create_dir_all(bootstrap_dir)?;
+
+    let versions = if args.versions.is_empty() {
+        info!("Reading versions from file...");
+        read_versions_file().await?
+    } else {
+        args.versions
+    };
+
+    let requests = versions
+        .iter()
+        .map(|version| {
+            PythonDownloadRequest::from_str(version).and_then(PythonDownloadRequest::fill)
+        })
+        .collect::<Result<Vec<_>, Error>>()?;
+
+    let downloads = requests
+        .iter()
+        .map(|request| match PythonDownload::from_request(request) {
+            Some(download) => download,
+            None => panic!("No download found for request {request:?}"),
+        })
+        .collect::<Vec<_>>();
+
+    let client = uv_client::BaseClientBuilder::new().build();
+
+    info!("Fetching requested versions...");
+    let mut tasks = futures::stream::iter(downloads.iter())
+        .map(|download| {
+            async {
+                let result = download.fetch(&client, bootstrap_dir).await;
+                (download.python_version(), result)
+            }
+            .instrument(info_span!("download", key = %download))
+        })
+        .buffered(4);
+
+    let mut results = Vec::new();
+    let mut downloaded = 0;
+    while let Some(task) = tasks.next().await {
+        let (version, result) = task;
+        let path = match result? {
+            DownloadResult::AlreadyAvailable(path) => {
+                info!("Found existing download for v{}", version);
+                path
+            }
+            DownloadResult::Fetched(path) => {
+                info!("Downloaded v{} to {}", version, path.user_display());
+                downloaded += 1;
+                path
+            }
+        };
+        results.push((version, path));
+    }
+
+    if downloaded > 0 {
+        let s = if downloaded == 1 { "" } else { "s" };
+        info!(
+            "Fetched {} in {}s",
+            format!("{} version{}", downloaded, s),
+            start.elapsed().as_secs()
+        );
+    } else {
+        info!("All versions downloaded already.");
+    };
+
+    // Order matters here, as we overwrite previous links
+    info!("Installing to `{}`...", bootstrap_dir.user_display());
+
+    // On Windows, linking the executable generally results in broken installations
+    // and each toolchain path will need to be added to the PATH separately in the
+    // desired order
+    #[cfg(unix)]
+    {
+        let mut links: HashMap<PathBuf, PathBuf> = HashMap::new();
+        for (version, path) in results {
+            // TODO(zanieb): This path should be a part of the download metadata
+            let executable = path.join("install").join("bin").join("python3");
+            for target in [
+                bootstrap_dir.join(format!("python{}", version.python_full_version())),
+                bootstrap_dir.join(format!("python{}.{}", version.major(), version.minor())),
+                bootstrap_dir.join(format!("python{}", version.major())),
+                bootstrap_dir.join("python"),
+            ] {
+                // Attempt to remove it, we'll fail on link if we couldn't remove it for some reason
+                // but if it's missing we don't want to error
+                let _ = fs::remove_file(&target);
+                symlink(&executable, &target).await?;
+                links.insert(target, executable.clone());
+            }
+        }
+        for (target, executable) in links.iter().sorted() {
+            info!(
+                "Linked `{}` to `{}`",
+                target.user_display(),
+                executable.user_display()
+            );
+        }
+    };
+
+    info!("Installed {} versions", requests.len());
+
+    Ok(())
+}
+
+async fn read_versions_file() -> Result<Vec<String>> {
+    let lines: Vec<String> = fs::tokio::read_to_string(".python-versions")
+        .await?
+        .lines()
+        .map(ToString::to_string)
+        .collect();
+    Ok(lines)
+}
diff --git a/crates/uv-dev/src/main.rs b/crates/uv-dev/src/main.rs
index dc5865c9f..ce83a8167 100644
--- a/crates/uv-dev/src/main.rs
+++ b/crates/uv-dev/src/main.rs
@@ -21,6 +21,7 @@ use resolve_many::ResolveManyArgs;
 use crate::build::{build, BuildArgs};
 use crate::clear_compile::ClearCompileArgs;
 use crate::compile::CompileArgs;
+use crate::fetch_python::FetchPythonArgs;
 use crate::render_benchmarks::RenderBenchmarksArgs;
 use crate::resolve_cli::ResolveCliArgs;
 use crate::wheel_metadata::WheelMetadataArgs;
@@ -44,6 +45,7 @@ static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
 mod build;
 mod clear_compile;
 mod compile;
+mod fetch_python;
 mod render_benchmarks;
 mod resolve_cli;
 mod resolve_many;
@@ -72,6 +74,8 @@ enum Cli {
     Compile(CompileArgs),
     /// Remove all `.pyc` in the tree.
     ClearCompile(ClearCompileArgs),
+    /// Fetch Python versions for testing
+    FetchPython(FetchPythonArgs),
 }
 
 #[instrument] // Anchor span to check for overhead
@@ -92,6 +96,7 @@ async fn run() -> Result<()> {
         Cli::RenderBenchmarks(args) => render_benchmarks::render_benchmarks(&args)?,
         Cli::Compile(args) => compile::compile(args).await?,
         Cli::ClearCompile(args) => clear_compile::clear_compile(&args)?,
+        Cli::FetchPython(args) => fetch_python::fetch_python(args).await?,
     }
     Ok(())
 }
diff --git a/crates/uv-dev/src/resolve_cli.rs b/crates/uv-dev/src/resolve_cli.rs
index bb320628c..b4aa0d992 100644
--- a/crates/uv-dev/src/resolve_cli.rs
+++ b/crates/uv-dev/src/resolve_cli.rs
@@ -12,12 +12,13 @@ use petgraph::dot::{Config as DotConfig, Dot};
 use distribution_types::{FlatIndexLocation, IndexLocations, IndexUrl, Resolution};
 use pep508_rs::Requirement;
 use uv_cache::{Cache, CacheArgs};
-use uv_client::{FlatIndex, FlatIndexClient, RegistryClientBuilder};
+use uv_client::{FlatIndexClient, RegistryClientBuilder};
+use uv_configuration::{ConfigSettings, NoBinary, NoBuild, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_installer::SitePackages;
 use uv_interpreter::PythonEnvironment;
-use uv_resolver::{InMemoryIndex, Manifest, Options, Resolver};
-use uv_types::{BuildIsolation, ConfigSettings, InFlight, NoBinary, NoBuild, SetupPyStrategy};
+use uv_resolver::{FlatIndex, InMemoryIndex, Manifest, Options, Resolver};
+use uv_types::{BuildIsolation, HashStrategy, InFlight};
 
 #[derive(ValueEnum, Default, Clone)]
 pub(crate) enum ResolveCliFormat {
@@ -56,14 +57,6 @@ pub(crate) async fn resolve_cli(args: ResolveCliArgs) -> Result<()> {
     let venv = PythonEnvironment::from_virtualenv(&cache)?;
     let index_locations =
         IndexLocations::new(args.index_url, args.extra_index_url, args.find_links, false);
-    let client = RegistryClientBuilder::new(cache.clone())
-        .index_urls(index_locations.index_urls())
-        .build();
-    let flat_index = {
-        let client = FlatIndexClient::new(&client, &cache);
-        let entries = client.fetch(index_locations.flat_index()).await?;
-        FlatIndex::from_entries(entries, venv.interpreter().tags()?)
-    };
     let index = InMemoryIndex::default();
     let in_flight = InFlight::default();
     let no_build = if args.no_build {
@@ -71,6 +64,20 @@ pub(crate) async fn resolve_cli(args: ResolveCliArgs) -> Result<()> {
     } else {
         NoBuild::None
     };
+    let client = RegistryClientBuilder::new(cache.clone())
+        .index_urls(index_locations.index_urls())
+        .build();
+    let flat_index = {
+        let client = FlatIndexClient::new(&client, &cache);
+        let entries = client.fetch(index_locations.flat_index()).await?;
+        FlatIndex::from_entries(
+            entries,
+            venv.interpreter().tags()?,
+            &HashStrategy::None,
+            &no_build,
+            &NoBinary::None,
+        )
+    };
     let config_settings = ConfigSettings::default();
 
     let build_dispatch = BuildDispatch::new(
@@ -101,6 +108,7 @@ pub(crate) async fn resolve_cli(args: ResolveCliArgs) -> Result<()> {
         &client,
         &flat_index,
         &index,
+        &HashStrategy::None,
         &build_dispatch,
         &site_packages,
     )?;
diff --git a/crates/uv-dev/src/resolve_many.rs b/crates/uv-dev/src/resolve_many.rs
index f5608b46a..761fcbed6 100644
--- a/crates/uv-dev/src/resolve_many.rs
+++ b/crates/uv-dev/src/resolve_many.rs
@@ -14,13 +14,13 @@ use distribution_types::IndexLocations;
 use pep440_rs::{Version, VersionSpecifier, VersionSpecifiers};
 use pep508_rs::{Requirement, VersionOrUrl};
 use uv_cache::{Cache, CacheArgs};
-use uv_client::{FlatIndex, OwnedArchive, RegistryClient, RegistryClientBuilder};
+use uv_client::{OwnedArchive, RegistryClient, RegistryClientBuilder};
+use uv_configuration::{ConfigSettings, NoBinary, NoBuild, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_interpreter::PythonEnvironment;
 use uv_normalize::PackageName;
-use uv_resolver::InMemoryIndex;
-use uv_types::NoBinary;
-use uv_types::{BuildContext, BuildIsolation, ConfigSettings, InFlight, NoBuild, SetupPyStrategy};
+use uv_resolver::{FlatIndex, InMemoryIndex};
+use uv_types::{BuildContext, BuildIsolation, InFlight};
 
 #[derive(Parser)]
 pub(crate) struct ResolveManyArgs {
@@ -47,10 +47,17 @@ async fn find_latest_version(
     client: &RegistryClient,
     package_name: &PackageName,
 ) -> Option<Version> {
-    let (_, raw_simple_metadata) = client.simple(package_name).await.ok()?;
-    let simple_metadata = OwnedArchive::deserialize(&raw_simple_metadata);
-    let version = simple_metadata.into_iter().next()?.version;
-    Some(version)
+    client
+        .simple(package_name)
+        .await
+        .ok()
+        .into_iter()
+        .flatten()
+        .filter_map(|(_index, raw_simple_metadata)| {
+            let simple_metadata = OwnedArchive::deserialize(&raw_simple_metadata);
+            Some(simple_metadata.into_iter().next()?.version)
+        })
+        .max()
 }
 
 pub(crate) async fn resolve_many(args: ResolveManyArgs) -> Result<()> {
diff --git a/crates/uv-dispatch/Cargo.toml b/crates/uv-dispatch/Cargo.toml
index 727e11668..7cd8476d4 100644
--- a/crates/uv-dispatch/Cargo.toml
+++ b/crates/uv-dispatch/Cargo.toml
@@ -21,9 +21,9 @@ uv-cache = { workspace = true }
 uv-client = { workspace = true }
 uv-installer = { workspace = true }
 uv-interpreter = { workspace = true }
-uv-requirements = { workspace = true }
 uv-resolver = { workspace = true }
 uv-types = { workspace = true }
+uv-configuration = { workspace = true }
 
 anyhow = { workspace = true }
 futures = { workspace = true }
diff --git a/crates/uv-dispatch/src/lib.rs b/crates/uv-dispatch/src/lib.rs
index 7a73c81d4..b204b9a1f 100644
--- a/crates/uv-dispatch/src/lib.rs
+++ b/crates/uv-dispatch/src/lib.rs
@@ -3,8 +3,8 @@
 //! implementing [`BuildContext`].
 
 use std::ffi::OsStr;
+use std::ffi::OsString;
 use std::path::Path;
-use std::{ffi::OsString, future::Future};
 
 use anyhow::{bail, Context, Result};
 use futures::FutureExt;
@@ -16,14 +16,12 @@ use distribution_types::{IndexLocations, Name, Resolution, SourceDist};
 use pep508_rs::Requirement;
 use uv_build::{SourceBuild, SourceBuildContext};
 use uv_cache::Cache;
-use uv_client::{FlatIndex, RegistryClient};
+use uv_client::RegistryClient;
+use uv_configuration::{BuildKind, ConfigSettings, NoBinary, NoBuild, Reinstall, SetupPyStrategy};
 use uv_installer::{Downloader, Installer, Plan, Planner, SitePackages};
 use uv_interpreter::{Interpreter, PythonEnvironment};
-use uv_resolver::{InMemoryIndex, Manifest, Options, Resolver};
-use uv_types::{
-    BuildContext, BuildIsolation, BuildKind, ConfigSettings, EmptyInstalledPackages, InFlight,
-    NoBinary, NoBuild, Reinstall, SetupPyStrategy,
-};
+use uv_resolver::{FlatIndex, InMemoryIndex, Manifest, Options, Resolver};
+use uv_types::{BuildContext, BuildIsolation, EmptyInstalledPackages, HashStrategy, InFlight};
 
 /// The main implementation of [`BuildContext`], used by the CLI, see [`BuildContext`]
 /// documentation.
@@ -145,6 +143,7 @@ impl<'a> BuildContext for BuildDispatch<'a> {
             self.client,
             self.flat_index,
             self.index,
+            &HashStrategy::None,
             self,
             &EmptyInstalledPackages,
         )?;
@@ -157,7 +156,6 @@ impl<'a> BuildContext for BuildDispatch<'a> {
         Ok(Resolution::from(graph))
     }
 
-    #[allow(clippy::manual_async_fn)] // TODO(konstin): rustc 1.75 gets into a type inference cycle with async fn
     #[instrument(
         skip(self, resolution, venv),
         fields(
@@ -165,119 +163,118 @@ impl<'a> BuildContext for BuildDispatch<'a> {
             venv = ?venv.root()
         )
     )]
-    fn install<'data>(
+    async fn install<'data>(
         &'data self,
         resolution: &'data Resolution,
         venv: &'data PythonEnvironment,
-    ) -> impl Future<Output = Result<()>> + Send + 'data {
-        async move {
-            debug!(
-                "Installing in {} in {}",
+    ) -> Result<()> {
+        debug!(
+            "Installing in {} in {}",
+            resolution
+                .distributions()
+                .map(ToString::to_string)
+                .join(", "),
+            venv.root().display(),
+        );
+
+        // Determine the current environment markers.
+        let tags = self.interpreter.tags()?;
+
+        // Determine the set of installed packages.
+        let site_packages = SitePackages::from_executable(venv)?;
+
+        let Plan {
+            cached,
+            remote,
+            installed: _,
+            reinstalls,
+            extraneous: _,
+        } = Planner::with_requirements(&resolution.requirements()).build(
+            site_packages,
+            &Reinstall::None,
+            &NoBinary::None,
+            &HashStrategy::None,
+            self.index_locations,
+            self.cache(),
+            venv,
+            tags,
+        )?;
+
+        // Nothing to do.
+        if remote.is_empty() && cached.is_empty() && reinstalls.is_empty() {
+            debug!("No build requirements to install for build");
+            return Ok(());
+        }
+
+        // Resolve any registry-based requirements.
+        let remote = remote
+            .iter()
+            .map(|dist| {
                 resolution
-                    .distributions()
-                    .map(ToString::to_string)
-                    .join(", "),
-                venv.root().display(),
+                    .get_remote(&dist.name)
+                    .cloned()
+                    .expect("Resolution should contain all packages")
+            })
+            .collect::<Vec<_>>();
+
+        // Download any missing distributions.
+        let wheels = if remote.is_empty() {
+            vec![]
+        } else {
+            // TODO(konstin): Check that there is no endless recursion.
+            let downloader =
+                Downloader::new(self.cache, tags, &HashStrategy::None, self.client, self);
+            debug!(
+                "Downloading and building requirement{} for build: {}",
+                if remote.len() == 1 { "" } else { "s" },
+                remote.iter().map(ToString::to_string).join(", ")
             );
 
-            // Determine the current environment markers.
-            let tags = self.interpreter.tags()?;
+            downloader
+                .download(remote, self.in_flight)
+                .await
+                .context("Failed to download and build distributions")?
+        };
 
-            // Determine the set of installed packages.
-            let site_packages = SitePackages::from_executable(venv)?;
-
-            let Plan {
-                cached,
-                remote,
-                installed: _,
-                reinstalls,
-                extraneous: _,
-            } = Planner::with_requirements(&resolution.requirements()).build(
-                site_packages,
-                &Reinstall::None,
-                &NoBinary::None,
-                self.index_locations,
-                self.cache(),
-                venv,
-                tags,
-            )?;
-
-            // Nothing to do.
-            if remote.is_empty() && cached.is_empty() && reinstalls.is_empty() {
-                debug!("No build requirements to install for build");
-                return Ok(());
-            }
-
-            // Resolve any registry-based requirements.
-            let remote = remote
-                .iter()
-                .map(|dist| {
-                    resolution
-                        .get_remote(&dist.name)
-                        .cloned()
-                        .expect("Resolution should contain all packages")
-                })
-                .collect::<Vec<_>>();
-
-            // Download any missing distributions.
-            let wheels = if remote.is_empty() {
-                vec![]
-            } else {
-                // TODO(konstin): Check that there is no endless recursion.
-                let downloader = Downloader::new(self.cache, tags, self.client, self);
-                debug!(
-                    "Downloading and building requirement{} for build: {}",
-                    if remote.len() == 1 { "" } else { "s" },
-                    remote.iter().map(ToString::to_string).join(", ")
-                );
-
-                downloader
-                    .download(remote, self.in_flight)
+        // Remove any unnecessary packages.
+        if !reinstalls.is_empty() {
+            for dist_info in &reinstalls {
+                let summary = uv_installer::uninstall(dist_info)
                     .await
-                    .context("Failed to download and build distributions")?
-            };
-
-            // Remove any unnecessary packages.
-            if !reinstalls.is_empty() {
-                for dist_info in &reinstalls {
-                    let summary = uv_installer::uninstall(dist_info)
-                        .await
-                        .context("Failed to uninstall build dependencies")?;
-                    debug!(
-                        "Uninstalled {} ({} file{}, {} director{})",
-                        dist_info.name(),
-                        summary.file_count,
-                        if summary.file_count == 1 { "" } else { "s" },
-                        summary.dir_count,
-                        if summary.dir_count == 1 { "y" } else { "ies" },
-                    );
-                }
-            }
-
-            // Install the resolved distributions.
-            let wheels = wheels.into_iter().chain(cached).collect::<Vec<_>>();
-            if !wheels.is_empty() {
+                    .context("Failed to uninstall build dependencies")?;
                 debug!(
-                    "Installing build requirement{}: {}",
-                    if wheels.len() == 1 { "" } else { "s" },
-                    wheels.iter().map(ToString::to_string).join(", ")
+                    "Uninstalled {} ({} file{}, {} director{})",
+                    dist_info.name(),
+                    summary.file_count,
+                    if summary.file_count == 1 { "" } else { "s" },
+                    summary.dir_count,
+                    if summary.dir_count == 1 { "y" } else { "ies" },
                 );
-                Installer::new(venv)
-                    .install(&wheels)
-                    .context("Failed to install build dependencies")?;
             }
-
-            Ok(())
         }
+
+        // Install the resolved distributions.
+        let wheels = wheels.into_iter().chain(cached).collect::<Vec<_>>();
+        if !wheels.is_empty() {
+            debug!(
+                "Installing build requirement{}: {}",
+                if wheels.len() == 1 { "" } else { "s" },
+                wheels.iter().map(ToString::to_string).join(", ")
+            );
+            Installer::new(venv)
+                .install(&wheels)
+                .context("Failed to install build dependencies")?;
+        }
+
+        Ok(())
     }
 
-    #[allow(clippy::manual_async_fn)] // TODO(konstin): rustc 1.75 gets into a type inference cycle with async fn
-    #[instrument(skip_all, fields(package_id = package_id, subdirectory = ?subdirectory))]
+    #[instrument(skip_all, fields(version_id = version_id, subdirectory = ?subdirectory))]
     async fn setup_build<'data>(
         &'data self,
         source: &'data Path,
         subdirectory: Option<&'data Path>,
-        package_id: &'data str,
+        version_id: &'data str,
         dist: Option<&'data SourceDist>,
         build_kind: BuildKind,
     ) -> Result<SourceBuild> {
@@ -307,7 +304,7 @@ impl<'a> BuildContext for BuildDispatch<'a> {
             self.interpreter,
             self,
             self.source_build_context.clone(),
-            package_id.to_string(),
+            version_id.to_string(),
             self.setup_py,
             self.config_settings.clone(),
             self.build_isolation,
diff --git a/crates/uv-distribution/Cargo.toml b/crates/uv-distribution/Cargo.toml
index 42b8c9e12..a4814ff6d 100644
--- a/crates/uv-distribution/Cargo.toml
+++ b/crates/uv-distribution/Cargo.toml
@@ -28,10 +28,12 @@ uv-fs = { workspace = true, features = ["tokio"] }
 uv-git = { workspace = true, features = ["vendored-openssl"] }
 uv-normalize = { workspace = true }
 uv-types = { workspace = true }
+uv-configuration = { workspace = true }
 
 anyhow = { workspace = true }
 fs-err = { workspace = true }
 futures = { workspace = true }
+md-5 = { workspace = true }
 nanoid = { workspace = true }
 once_cell = { workspace = true }
 reqwest = { workspace = true }
@@ -39,6 +41,7 @@ reqwest-middleware = { workspace = true }
 rmp-serde = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
+sha2 = { workspace = true }
 tempfile = { workspace = true }
 thiserror = { workspace = true }
 tokio = { workspace = true }
@@ -46,4 +49,3 @@ tokio-util = { workspace = true, features = ["compat"] }
 tracing = { workspace = true }
 url = { workspace = true }
 zip = { workspace = true }
-
diff --git a/crates/uv-distribution/src/archive.rs b/crates/uv-distribution/src/archive.rs
new file mode 100644
index 000000000..3d02d9e85
--- /dev/null
+++ b/crates/uv-distribution/src/archive.rs
@@ -0,0 +1,25 @@
+use distribution_types::Hashed;
+use pypi_types::HashDigest;
+use uv_cache::ArchiveId;
+
+/// An archive (unzipped wheel) that exists in the local cache.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct Archive {
+    /// The unique ID of the entry in the wheel's archive bucket.
+    pub id: ArchiveId,
+    /// The computed hashes of the archive.
+    pub hashes: Vec<HashDigest>,
+}
+
+impl Archive {
+    /// Create a new [`Archive`] with the given ID and hashes.
+    pub(crate) fn new(id: ArchiveId, hashes: Vec<HashDigest>) -> Self {
+        Self { id, hashes }
+    }
+}
+
+impl Hashed for Archive {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
+}
diff --git a/crates/uv-distribution/src/distribution_database.rs b/crates/uv-distribution/src/distribution_database.rs
index e4b1cec23..67bc80cb5 100644
--- a/crates/uv-distribution/src/distribution_database.rs
+++ b/crates/uv-distribution/src/distribution_database.rs
@@ -1,8 +1,9 @@
 use std::io;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::sync::Arc;
 
 use futures::{FutureExt, TryStreamExt};
+use tempfile::TempDir;
 use tokio::io::AsyncSeekExt;
 use tokio_util::compat::FuturesAsyncReadCompatExt;
 use tracing::{info_span, instrument, warn, Instrument};
@@ -10,17 +11,23 @@ use url::Url;
 
 use distribution_filename::WheelFilename;
 use distribution_types::{
-    BuildableSource, BuiltDist, Dist, FileLocation, IndexLocations, LocalEditable, Name, SourceDist,
+    BuildableSource, BuiltDist, Dist, FileLocation, HashPolicy, Hashed, IndexLocations,
+    LocalEditable, Name, SourceDist,
 };
 use platform_tags::Tags;
-use pypi_types::Metadata23;
-use uv_cache::{ArchiveTarget, ArchiveTimestamp, CacheBucket, CacheEntry, WheelCache};
-use uv_client::{CacheControl, CachedClientError, Connectivity, RegistryClient};
-use uv_types::{BuildContext, NoBinary, NoBuild};
+use pypi_types::{HashDigest, Metadata23};
+use uv_cache::{ArchiveId, ArchiveTimestamp, CacheBucket, CacheEntry, Timestamp, WheelCache};
+use uv_client::{
+    CacheControl, CachedClientError, Connectivity, DataWithCachePolicy, RegistryClient,
+};
+use uv_configuration::{NoBinary, NoBuild};
+use uv_extract::hash::Hasher;
+use uv_fs::write_atomic;
+use uv_types::BuildContext;
 
-use crate::download::{BuiltWheel, UnzippedWheel};
+use crate::archive::Archive;
 use crate::locks::Locks;
-use crate::{DiskWheel, Error, LocalWheel, Reporter, SourceDistributionBuilder};
+use crate::{ArchiveMetadata, Error, LocalWheel, Reporter, SourceDistributionBuilder};
 
 /// A cached high-level interface to convert distributions (a requirement resolved to a location)
 /// to a wheel or wheel metadata.
@@ -77,28 +84,38 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
 
     /// Either fetch the wheel or fetch and build the source distribution
     ///
-    /// If `no_remote_wheel` is set, the wheel will be built from a source distribution
-    /// even if compatible pre-built wheels are available.
+    /// Returns a wheel that's compliant with the given platform tags.
+    ///
+    /// While hashes will be generated in some cases, hash-checking is only enforced for source
+    /// distributions, and should be enforced by the caller for wheels.
     #[instrument(skip_all, fields(%dist))]
-    pub async fn get_or_build_wheel(&self, dist: &Dist, tags: &Tags) -> Result<LocalWheel, Error> {
+    pub async fn get_or_build_wheel(
+        &self,
+        dist: &Dist,
+        tags: &Tags,
+        hashes: HashPolicy<'_>,
+    ) -> Result<LocalWheel, Error> {
         match dist {
-            Dist::Built(built) => self.get_wheel(built).await,
-            Dist::Source(source) => self.build_wheel(source, tags).await,
+            Dist::Built(built) => self.get_wheel(built, hashes).await,
+            Dist::Source(source) => self.build_wheel(source, tags, hashes).await,
         }
     }
 
     /// Either fetch the only wheel metadata (directly from the index or with range requests) or
     /// fetch and build the source distribution.
     ///
-    /// Returns the [`Metadata23`], along with a "precise" URL for the source distribution, if
-    /// possible. For example, given a Git dependency with a reference to a branch or tag, return a
-    /// URL with a precise reference to the current commit of that branch or tag.
+    /// While hashes will be generated in some cases, hash-checking is only enforced for source
+    /// distributions, and should be enforced by the caller for wheels.
     #[instrument(skip_all, fields(%dist))]
-    pub async fn get_or_build_wheel_metadata(&self, dist: &Dist) -> Result<Metadata23, Error> {
+    pub async fn get_or_build_wheel_metadata(
+        &self,
+        dist: &Dist,
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
         match dist {
-            Dist::Built(built) => self.get_wheel_metadata(built).await,
+            Dist::Built(built) => self.get_wheel_metadata(built, hashes).await,
             Dist::Source(source) => {
-                self.build_wheel_metadata(&BuildableSource::Dist(source))
+                self.build_wheel_metadata(&BuildableSource::Dist(source), hashes)
                     .await
             }
         }
@@ -110,22 +127,35 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
         editable: &LocalEditable,
         editable_wheel_dir: &Path,
     ) -> Result<(LocalWheel, Metadata23), Error> {
+        // Build the wheel.
         let (dist, disk_filename, filename, metadata) = self
             .builder
             .build_editable(editable, editable_wheel_dir)
             .await?;
 
-        let built_wheel = BuiltWheel {
+        // Unzip into the editable wheel directory.
+        let path = editable_wheel_dir.join(&disk_filename);
+        let target = editable_wheel_dir.join(cache_key::digest(&editable.path));
+        let id = self.unzip_wheel(&path, &target).await?;
+        let wheel = LocalWheel {
             dist,
             filename,
-            path: editable_wheel_dir.join(disk_filename),
-            target: editable_wheel_dir.join(cache_key::digest(&editable.path)),
+            archive: self.build_context.cache().archive(&id),
+            hashes: vec![],
         };
-        Ok((LocalWheel::Built(built_wheel), metadata))
+
+        Ok((wheel, metadata))
     }
 
     /// Fetch a wheel from the cache or download it from the index.
-    async fn get_wheel(&self, dist: &BuiltDist) -> Result<LocalWheel, Error> {
+    ///
+    /// While hashes will be generated in all cases, hash-checking is _not_ enforced and should
+    /// instead be enforced by the caller.
+    async fn get_wheel(
+        &self,
+        dist: &BuiltDist,
+        hashes: HashPolicy<'_>,
+    ) -> Result<LocalWheel, Error> {
         let no_binary = match self.build_context.no_binary() {
             NoBinary::None => false,
             NoBinary::All => true,
@@ -145,41 +175,14 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                         Url::parse(url).map_err(|err| Error::Url(url.clone(), err))?
                     }
                     FileLocation::Path(path) => {
-                        let url = Url::from_file_path(path).expect("path is absolute");
                         let cache_entry = self.build_context.cache().entry(
                             CacheBucket::Wheels,
-                            WheelCache::Url(&url).wheel_dir(wheel.name().as_ref()),
+                            WheelCache::Index(&wheel.index).wheel_dir(wheel.name().as_ref()),
                             wheel.filename.stem(),
                         );
-
-                        // If the file is already unzipped, and the unzipped directory is fresh,
-                        // return it.
-                        match cache_entry.path().canonicalize() {
-                            Ok(archive) => {
-                                if ArchiveTimestamp::up_to_date_with(
-                                    path,
-                                    ArchiveTarget::Cache(&archive),
-                                )
-                                .map_err(Error::CacheRead)?
-                                {
-                                    return Ok(LocalWheel::Unzipped(UnzippedWheel {
-                                        dist: Dist::Built(dist.clone()),
-                                        archive,
-                                        filename: wheel.filename.clone(),
-                                    }));
-                                }
-                            }
-                            Err(err) if err.kind() == io::ErrorKind::NotFound => {}
-                            Err(err) => return Err(Error::CacheRead(err)),
-                        }
-
-                        // Otherwise, unzip the file.
-                        return Ok(LocalWheel::Disk(DiskWheel {
-                            dist: Dist::Built(dist.clone()),
-                            path: path.clone(),
-                            target: cache_entry.into_path_buf(),
-                            filename: wheel.filename.clone(),
-                        }));
+                        return self
+                            .load_wheel(path, &wheel.filename, cache_entry, dist, hashes)
+                            .await;
                     }
                 };
 
@@ -192,14 +195,15 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
 
                 // Download and unzip.
                 match self
-                    .stream_wheel(url.clone(), &wheel.filename, &wheel_entry, dist)
+                    .stream_wheel(url.clone(), &wheel.filename, &wheel_entry, dist, hashes)
                     .await
                 {
-                    Ok(archive) => Ok(LocalWheel::Unzipped(UnzippedWheel {
+                    Ok(archive) => Ok(LocalWheel {
                         dist: Dist::Built(dist.clone()),
-                        archive,
+                        archive: self.build_context.cache().archive(&archive.id),
+                        hashes: archive.hashes,
                         filename: wheel.filename.clone(),
-                    })),
+                    }),
                     Err(Error::Extract(err)) if err.is_http_streaming_unsupported() => {
                         warn!(
                             "Streaming unsupported for {dist}; downloading wheel to disk ({err})"
@@ -208,13 +212,14 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                         // If the request failed because streaming is unsupported, download the
                         // wheel directly.
                         let archive = self
-                            .download_wheel(url, &wheel.filename, &wheel_entry, dist)
+                            .download_wheel(url, &wheel.filename, &wheel_entry, dist, hashes)
                             .await?;
-                        Ok(LocalWheel::Unzipped(UnzippedWheel {
+                        Ok(LocalWheel {
                             dist: Dist::Built(dist.clone()),
-                            archive,
+                            archive: self.build_context.cache().archive(&archive.id),
+                            hashes: archive.hashes,
                             filename: wheel.filename.clone(),
-                        }))
+                        })
                     }
                     Err(err) => Err(err),
                 }
@@ -230,14 +235,21 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
 
                 // Download and unzip.
                 match self
-                    .stream_wheel(wheel.url.raw().clone(), &wheel.filename, &wheel_entry, dist)
+                    .stream_wheel(
+                        wheel.url.raw().clone(),
+                        &wheel.filename,
+                        &wheel_entry,
+                        dist,
+                        hashes,
+                    )
                     .await
                 {
-                    Ok(archive) => Ok(LocalWheel::Unzipped(UnzippedWheel {
+                    Ok(archive) => Ok(LocalWheel {
                         dist: Dist::Built(dist.clone()),
-                        archive,
+                        archive: self.build_context.cache().archive(&archive.id),
+                        hashes: archive.hashes,
                         filename: wheel.filename.clone(),
-                    })),
+                    }),
                     Err(Error::Client(err)) if err.is_http_streaming_unsupported() => {
                         warn!(
                             "Streaming unsupported for {dist}; downloading wheel to disk ({err})"
@@ -251,13 +263,15 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                                 &wheel.filename,
                                 &wheel_entry,
                                 dist,
+                                hashes,
                             )
                             .await?;
-                        Ok(LocalWheel::Unzipped(UnzippedWheel {
+                        Ok(LocalWheel {
                             dist: Dist::Built(dist.clone()),
-                            archive,
+                            archive: self.build_context.cache().archive(&archive.id),
+                            hashes: archive.hashes,
                             filename: wheel.filename.clone(),
-                        }))
+                        })
                     }
                     Err(err) => Err(err),
                 }
@@ -270,90 +284,107 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                     wheel.filename.stem(),
                 );
 
-                // If the file is already unzipped, and the unzipped directory is fresh,
-                // return it.
-                match cache_entry.path().canonicalize() {
-                    Ok(archive) => {
-                        if ArchiveTimestamp::up_to_date_with(
-                            &wheel.path,
-                            ArchiveTarget::Cache(&archive),
-                        )
-                        .map_err(Error::CacheRead)?
-                        {
-                            return Ok(LocalWheel::Unzipped(UnzippedWheel {
-                                dist: Dist::Built(dist.clone()),
-                                archive,
-                                filename: wheel.filename.clone(),
-                            }));
-                        }
-                    }
-                    Err(err) if err.kind() == io::ErrorKind::NotFound => {}
-                    Err(err) => return Err(Error::CacheRead(err)),
-                }
-
-                Ok(LocalWheel::Disk(DiskWheel {
-                    dist: Dist::Built(dist.clone()),
-                    path: wheel.path.clone(),
-                    target: cache_entry.into_path_buf(),
-                    filename: wheel.filename.clone(),
-                }))
+                self.load_wheel(&wheel.path, &wheel.filename, cache_entry, dist, hashes)
+                    .await
             }
         }
     }
 
     /// Convert a source distribution into a wheel, fetching it from the cache or building it if
     /// necessary.
-    async fn build_wheel(&self, dist: &SourceDist, tags: &Tags) -> Result<LocalWheel, Error> {
+    ///
+    /// The returned wheel is guaranteed to come from a distribution with a matching hash, and
+    /// no build processes will be executed for distributions with mismatched hashes.
+    async fn build_wheel(
+        &self,
+        dist: &SourceDist,
+        tags: &Tags,
+        hashes: HashPolicy<'_>,
+    ) -> Result<LocalWheel, Error> {
         let lock = self.locks.acquire(&Dist::Source(dist.clone())).await;
         let _guard = lock.lock().await;
 
         let built_wheel = self
             .builder
-            .download_and_build(&BuildableSource::Dist(dist), tags)
+            .download_and_build(&BuildableSource::Dist(dist), tags, hashes)
             .boxed()
             .await?;
 
         // If the wheel was unzipped previously, respect it. Source distributions are
-        // cached under a unique build ID, so unzipped directories are never stale.
+        // cached under a unique revision ID, so unzipped directories are never stale.
         match built_wheel.target.canonicalize() {
-            Ok(archive) => Ok(LocalWheel::Unzipped(UnzippedWheel {
-                dist: Dist::Source(dist.clone()),
-                archive,
-                filename: built_wheel.filename,
-            })),
-            Err(err) if err.kind() == io::ErrorKind::NotFound => {
-                Ok(LocalWheel::Built(BuiltWheel {
+            Ok(archive) => {
+                return Ok(LocalWheel {
                     dist: Dist::Source(dist.clone()),
-                    path: built_wheel.path,
-                    target: built_wheel.target,
+                    archive,
                     filename: built_wheel.filename,
-                }))
+                    hashes: built_wheel.hashes,
+                });
             }
-            Err(err) => Err(Error::CacheRead(err)),
+            Err(err) if err.kind() == io::ErrorKind::NotFound => {}
+            Err(err) => return Err(Error::CacheRead(err)),
         }
+
+        // Otherwise, unzip the wheel.
+        let id = self
+            .unzip_wheel(&built_wheel.path, &built_wheel.target)
+            .await?;
+
+        Ok(LocalWheel {
+            dist: Dist::Source(dist.clone()),
+            archive: self.build_context.cache().archive(&id),
+            hashes: built_wheel.hashes,
+            filename: built_wheel.filename,
+        })
     }
 
     /// Fetch the wheel metadata from the index, or from the cache if possible.
-    pub async fn get_wheel_metadata(&self, dist: &BuiltDist) -> Result<Metadata23, Error> {
+    ///
+    /// While hashes will be generated in some cases, hash-checking is _not_ enforced and should
+    /// instead be enforced by the caller.
+    pub async fn get_wheel_metadata(
+        &self,
+        dist: &BuiltDist,
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        // If hash generation is enabled, and the distribution isn't hosted on an index, get the
+        // entire wheel to ensure that the hashes are included in the response. If the distribution
+        // is hosted on an index, the hashes will be included in the simple metadata response.
+        // For hash _validation_, callers are expected to enforce the policy when retrieving the
+        // wheel.
+        // TODO(charlie): Request the hashes via a separate method, to reduce the coupling in this API.
+        if hashes.is_generate() && matches!(dist, BuiltDist::DirectUrl(_) | BuiltDist::Path(_)) {
+            let wheel = self.get_wheel(dist, hashes).await?;
+            let metadata = wheel.metadata()?;
+            let hashes = wheel.hashes;
+            return Ok(ArchiveMetadata { metadata, hashes });
+        }
+
         match self.client.wheel_metadata(dist).boxed().await {
-            Ok(metadata) => Ok(metadata),
+            Ok(metadata) => Ok(ArchiveMetadata::from(metadata)),
             Err(err) if err.is_http_streaming_unsupported() => {
                 warn!("Streaming unsupported when fetching metadata for {dist}; downloading wheel directly ({err})");
 
                 // If the request failed due to an error that could be resolved by
                 // downloading the wheel directly, try that.
-                let wheel = self.get_wheel(dist).await?;
-                Ok(wheel.metadata()?)
+                let wheel = self.get_wheel(dist, hashes).await?;
+                let metadata = wheel.metadata()?;
+                let hashes = wheel.hashes;
+                Ok(ArchiveMetadata { metadata, hashes })
             }
             Err(err) => Err(err.into()),
         }
     }
 
     /// Build the wheel metadata for a source distribution, or fetch it from the cache if possible.
+    ///
+    /// The returned metadata is guaranteed to come from a distribution with a matching hash, and
+    /// no build processes will be executed for distributions with mismatched hashes.
     pub async fn build_wheel_metadata(
         &self,
         source: &BuildableSource<'_>,
-    ) -> Result<Metadata23, Error> {
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
         let no_build = match self.build_context.no_build() {
             NoBuild::All => true,
             NoBuild::None => false,
@@ -372,7 +403,7 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
 
         let metadata = self
             .builder
-            .download_and_build_metadata(source)
+            .download_and_build_metadata(source, hashes)
             .boxed()
             .await?;
         Ok(metadata)
@@ -385,7 +416,8 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
         filename: &WheelFilename,
         wheel_entry: &CacheEntry,
         dist: &BuiltDist,
-    ) -> Result<PathBuf, Error> {
+        hashes: HashPolicy<'_>,
+    ) -> Result<Archive, Error> {
         // Create an entry for the HTTP cache.
         let http_entry = wheel_entry.with_file(format!("{}.http", filename.stem()));
 
@@ -396,35 +428,39 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                     .map_err(|err| self.handle_response_errors(err))
                     .into_async_read();
 
+                // Create a hasher for each hash algorithm.
+                let algorithms = hashes.algorithms();
+                let mut hashers = algorithms.into_iter().map(Hasher::from).collect::<Vec<_>>();
+                let mut hasher = uv_extract::hash::HashReader::new(reader.compat(), &mut hashers);
+
                 // Download and unzip the wheel to a temporary directory.
                 let temp_dir = tempfile::tempdir_in(self.build_context.cache().root())
                     .map_err(Error::CacheWrite)?;
-                uv_extract::stream::unzip(reader.compat(), temp_dir.path()).await?;
+                uv_extract::stream::unzip(&mut hasher, temp_dir.path()).await?;
+
+                // If necessary, exhaust the reader to compute the hash.
+                if !hashes.is_none() {
+                    hasher.finish().await.map_err(Error::HashExhaustion)?;
+                }
 
                 // Persist the temporary directory to the directory store.
-                let archive = self
+                let id = self
                     .build_context
                     .cache()
                     .persist(temp_dir.into_path(), wheel_entry.path())
                     .await
                     .map_err(Error::CacheRead)?;
-                Ok(archive)
+
+                Ok(Archive::new(
+                    id,
+                    hashers.into_iter().map(HashDigest::from).collect(),
+                ))
             }
             .instrument(info_span!("wheel", wheel = %dist))
         };
 
-        let req = self
-            .client
-            .uncached_client()
-            .get(url)
-            .header(
-                // `reqwest` defaults to accepting compressed responses.
-                // Specify identity encoding to get consistent .whl downloading
-                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
-                "accept-encoding",
-                reqwest::header::HeaderValue::from_static("identity"),
-            )
-            .build()?;
+        // Fetch the archive from the cache, or download it if necessary.
+        let req = self.request(url.clone())?;
         let cache_control = match self.client.connectivity() {
             Connectivity::Online => CacheControl::from(
                 self.build_context
@@ -434,7 +470,6 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
             ),
             Connectivity::Offline => CacheControl::AllowStale,
         };
-
         let archive = self
             .client
             .cached_client()
@@ -445,6 +480,20 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                 CachedClientError::Client(err) => Error::Client(err),
             })?;
 
+        // If the archive is missing the required hashes, force a refresh.
+        let archive = if archive.has_digests(hashes) {
+            archive
+        } else {
+            self.client
+                .cached_client()
+                .skip_cache(self.request(url)?, &http_entry, download)
+                .await
+                .map_err(|err| match err {
+                    CachedClientError::Callback(err) => err,
+                    CachedClientError::Client(err) => Error::Client(err),
+                })?
+        };
+
         Ok(archive)
     }
 
@@ -455,7 +504,8 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
         filename: &WheelFilename,
         wheel_entry: &CacheEntry,
         dist: &BuiltDist,
-    ) -> Result<PathBuf, Error> {
+        hashes: HashPolicy<'_>,
+    ) -> Result<Archive, Error> {
         // Create an entry for the HTTP cache.
         let http_entry = wheel_entry.with_file(format!("{}.http", filename.stem()));
 
@@ -481,33 +531,48 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                 file.seek(io::SeekFrom::Start(0))
                     .await
                     .map_err(Error::CacheWrite)?;
-                let reader = tokio::io::BufReader::new(file);
-                uv_extract::seek::unzip(reader, temp_dir.path()).await?;
+
+                // If no hashes are required, parallelize the unzip operation.
+                let hashes = if hashes.is_none() {
+                    let file = file.into_std().await;
+                    tokio::task::spawn_blocking({
+                        let target = temp_dir.path().to_owned();
+                        move || -> Result<(), uv_extract::Error> {
+                            // Unzip the wheel into a temporary directory.
+                            uv_extract::unzip(file, &target)?;
+                            Ok(())
+                        }
+                    })
+                    .await??;
+
+                    vec![]
+                } else {
+                    // Create a hasher for each hash algorithm.
+                    let algorithms = hashes.algorithms();
+                    let mut hashers = algorithms.into_iter().map(Hasher::from).collect::<Vec<_>>();
+                    let mut hasher = uv_extract::hash::HashReader::new(file, &mut hashers);
+                    uv_extract::stream::unzip(&mut hasher, temp_dir.path()).await?;
+
+                    // If necessary, exhaust the reader to compute the hash.
+                    hasher.finish().await.map_err(Error::HashExhaustion)?;
+
+                    hashers.into_iter().map(HashDigest::from).collect()
+                };
 
                 // Persist the temporary directory to the directory store.
-                let archive = self
+                let id = self
                     .build_context
                     .cache()
                     .persist(temp_dir.into_path(), wheel_entry.path())
                     .await
                     .map_err(Error::CacheRead)?;
-                Ok(archive)
+
+                Ok(Archive::new(id, hashes))
             }
             .instrument(info_span!("wheel", wheel = %dist))
         };
 
-        let req = self
-            .client
-            .uncached_client()
-            .get(url)
-            .header(
-                // `reqwest` defaults to accepting compressed responses.
-                // Specify identity encoding to get consistent .whl downloading
-                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
-                "accept-encoding",
-                reqwest::header::HeaderValue::from_static("identity"),
-            )
-            .build()?;
+        let req = self.request(url.clone())?;
         let cache_control = match self.client.connectivity() {
             Connectivity::Online => CacheControl::from(
                 self.build_context
@@ -517,7 +582,6 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
             ),
             Connectivity::Offline => CacheControl::AllowStale,
         };
-
         let archive = self
             .client
             .cached_client()
@@ -528,11 +592,225 @@ impl<'a, Context: BuildContext + Send + Sync> DistributionDatabase<'a, Context>
                 CachedClientError::Client(err) => Error::Client(err),
             })?;
 
+        // If the archive is missing the required hashes, force a refresh.
+        let archive = if archive.has_digests(hashes) {
+            archive
+        } else {
+            self.client
+                .cached_client()
+                .skip_cache(self.request(url)?, &http_entry, download)
+                .await
+                .map_err(|err| match err {
+                    CachedClientError::Callback(err) => err,
+                    CachedClientError::Client(err) => Error::Client(err),
+                })?
+        };
+
         Ok(archive)
     }
 
+    /// Load a wheel from a local path.
+    async fn load_wheel(
+        &self,
+        path: &Path,
+        filename: &WheelFilename,
+        wheel_entry: CacheEntry,
+        dist: &BuiltDist,
+        hashes: HashPolicy<'_>,
+    ) -> Result<LocalWheel, Error> {
+        // Determine the last-modified time of the wheel.
+        let modified = ArchiveTimestamp::from_file(path).map_err(Error::CacheRead)?;
+
+        // Attempt to read the archive pointer from the cache.
+        let pointer_entry = wheel_entry.with_file(format!("{}.rev", filename.stem()));
+        let pointer = LocalArchivePointer::read_from(&pointer_entry)?;
+
+        // Extract the archive from the pointer.
+        let archive = pointer
+            .filter(|pointer| pointer.is_up_to_date(modified))
+            .map(LocalArchivePointer::into_archive)
+            .filter(|archive| archive.has_digests(hashes));
+
+        // If the file is already unzipped, and the cache is up-to-date, return it.
+        if let Some(archive) = archive {
+            Ok(LocalWheel {
+                dist: Dist::Built(dist.clone()),
+                archive: self.build_context.cache().archive(&archive.id),
+                hashes: archive.hashes,
+                filename: filename.clone(),
+            })
+        } else if hashes.is_none() {
+            // Otherwise, unzip the wheel.
+            let archive = Archive::new(self.unzip_wheel(path, wheel_entry.path()).await?, vec![]);
+
+            // Write the archive pointer to the cache.
+            let pointer = LocalArchivePointer {
+                timestamp: modified.timestamp(),
+                archive: archive.clone(),
+            };
+            pointer.write_to(&pointer_entry).await?;
+
+            Ok(LocalWheel {
+                dist: Dist::Built(dist.clone()),
+                archive: self.build_context.cache().archive(&archive.id),
+                hashes: archive.hashes,
+                filename: filename.clone(),
+            })
+        } else {
+            // If necessary, compute the hashes of the wheel.
+            let file = fs_err::tokio::File::open(path)
+                .await
+                .map_err(Error::CacheRead)?;
+            let temp_dir = tempfile::tempdir_in(self.build_context.cache().root())
+                .map_err(Error::CacheWrite)?;
+
+            // Create a hasher for each hash algorithm.
+            let algorithms = hashes.algorithms();
+            let mut hashers = algorithms.into_iter().map(Hasher::from).collect::<Vec<_>>();
+            let mut hasher = uv_extract::hash::HashReader::new(file, &mut hashers);
+
+            // Unzip the wheel to a temporary directory.
+            uv_extract::stream::unzip(&mut hasher, temp_dir.path()).await?;
+
+            // Exhaust the reader to compute the hash.
+            hasher.finish().await.map_err(Error::HashExhaustion)?;
+
+            let hashes = hashers.into_iter().map(HashDigest::from).collect();
+
+            // Persist the temporary directory to the directory store.
+            let id = self
+                .build_context
+                .cache()
+                .persist(temp_dir.into_path(), wheel_entry.path())
+                .await
+                .map_err(Error::CacheWrite)?;
+
+            // Create an archive.
+            let archive = Archive::new(id, hashes);
+
+            // Write the archive pointer to the cache.
+            let pointer = LocalArchivePointer {
+                timestamp: modified.timestamp(),
+                archive: archive.clone(),
+            };
+            pointer.write_to(&pointer_entry).await?;
+
+            Ok(LocalWheel {
+                dist: Dist::Built(dist.clone()),
+                archive: self.build_context.cache().archive(&archive.id),
+                hashes: archive.hashes,
+                filename: filename.clone(),
+            })
+        }
+    }
+
+    /// Unzip a wheel into the cache, returning the path to the unzipped directory.
+    async fn unzip_wheel(&self, path: &Path, target: &Path) -> Result<ArchiveId, Error> {
+        let temp_dir = tokio::task::spawn_blocking({
+            let path = path.to_owned();
+            let root = self.build_context.cache().root().to_path_buf();
+            move || -> Result<TempDir, uv_extract::Error> {
+                // Unzip the wheel into a temporary directory.
+                let temp_dir = tempfile::tempdir_in(root)?;
+                uv_extract::unzip(fs_err::File::open(path)?, temp_dir.path())?;
+                Ok(temp_dir)
+            }
+        })
+        .await??;
+
+        // Persist the temporary directory to the directory store.
+        let id = self
+            .build_context
+            .cache()
+            .persist(temp_dir.into_path(), target)
+            .await
+            .map_err(Error::CacheWrite)?;
+
+        Ok(id)
+    }
+
+    /// Returns a GET [`reqwest::Request`] for the given URL.
+    fn request(&self, url: Url) -> Result<reqwest::Request, reqwest::Error> {
+        self.client
+            .uncached_client()
+            .get(url)
+            .header(
+                // `reqwest` defaults to accepting compressed responses.
+                // Specify identity encoding to get consistent .whl downloading
+                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
+                "accept-encoding",
+                reqwest::header::HeaderValue::from_static("identity"),
+            )
+            .build()
+    }
+
     /// Return the [`IndexLocations`] used by this resolver.
     pub fn index_locations(&self) -> &IndexLocations {
         self.build_context.index_locations()
     }
 }
+
+/// A pointer to an archive in the cache, fetched from an HTTP archive.
+///
+/// Encoded with `MsgPack`, and represented on disk by a `.http` file.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct HttpArchivePointer {
+    archive: Archive,
+}
+
+impl HttpArchivePointer {
+    /// Read an [`HttpArchivePointer`] from the cache.
+    pub fn read_from(path: impl AsRef<Path>) -> Result<Option<Self>, Error> {
+        match fs_err::File::open(path.as_ref()) {
+            Ok(file) => {
+                let data = DataWithCachePolicy::from_reader(file)?.data;
+                let archive = rmp_serde::from_slice::<Archive>(&data)?;
+                Ok(Some(Self { archive }))
+            }
+            Err(err) if err.kind() == io::ErrorKind::NotFound => Ok(None),
+            Err(err) => Err(Error::CacheRead(err)),
+        }
+    }
+
+    /// Return the [`Archive`] from the pointer.
+    pub fn into_archive(self) -> Archive {
+        self.archive
+    }
+}
+
+/// A pointer to an archive in the cache, fetched from a local path.
+///
+/// Encoded with `MsgPack`, and represented on disk by a `.rev` file.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct LocalArchivePointer {
+    timestamp: Timestamp,
+    archive: Archive,
+}
+
+impl LocalArchivePointer {
+    /// Read an [`LocalArchivePointer`] from the cache.
+    pub fn read_from(path: impl AsRef<Path>) -> Result<Option<Self>, Error> {
+        match fs_err::read(path) {
+            Ok(cached) => Ok(Some(rmp_serde::from_slice::<LocalArchivePointer>(&cached)?)),
+            Err(err) if err.kind() == io::ErrorKind::NotFound => Ok(None),
+            Err(err) => Err(Error::CacheRead(err)),
+        }
+    }
+
+    /// Write an [`LocalArchivePointer`] to the cache.
+    pub async fn write_to(&self, entry: &CacheEntry) -> Result<(), Error> {
+        write_atomic(entry.path(), rmp_serde::to_vec(&self)?)
+            .await
+            .map_err(Error::CacheWrite)
+    }
+
+    /// Returns `true` if the archive is up-to-date with the given modified timestamp.
+    pub fn is_up_to_date(&self, modified: ArchiveTimestamp) -> bool {
+        self.timestamp == modified.timestamp()
+    }
+
+    /// Return the [`Archive`] from the pointer.
+    pub fn into_archive(self) -> Archive {
+        self.archive
+    }
+}
diff --git a/crates/uv-distribution/src/download.rs b/crates/uv-distribution/src/download.rs
index 7ee3726b5..68db0b722 100644
--- a/crates/uv-distribution/src/download.rs
+++ b/crates/uv-distribution/src/download.rs
@@ -1,14 +1,14 @@
 use std::path::{Path, PathBuf};
 
 use distribution_filename::WheelFilename;
-use distribution_types::{CachedDist, Dist};
-use pypi_types::Metadata23;
+use distribution_types::{CachedDist, Dist, Hashed};
+use pypi_types::{HashDigest, Metadata23};
 
 use crate::Error;
 
-/// A wheel that's been unzipped while downloading
+/// A locally available wheel.
 #[derive(Debug, Clone)]
-pub struct UnzippedWheel {
+pub struct LocalWheel {
     /// The remote distribution from which this wheel was downloaded.
     pub(crate) dist: Dist,
     /// The parsed filename.
@@ -16,115 +16,42 @@ pub struct UnzippedWheel {
     /// The canonicalized path in the cache directory to which the wheel was downloaded.
     /// Typically, a directory within the archive bucket.
     pub(crate) archive: PathBuf,
-}
-
-/// A downloaded wheel that's stored on-disk.
-#[derive(Debug, Clone)]
-pub struct DiskWheel {
-    /// The remote distribution from which this wheel was downloaded.
-    pub(crate) dist: Dist,
-    /// The parsed filename.
-    pub(crate) filename: WheelFilename,
-    /// The path to the downloaded wheel.
-    pub(crate) path: PathBuf,
-    /// The expected path to the downloaded wheel's entry in the cache.
-    /// Typically, a symlink within the wheels or built wheels bucket.
-    pub(crate) target: PathBuf,
-}
-
-/// A wheel built from a source distribution that's stored on-disk.
-#[derive(Debug, Clone)]
-pub struct BuiltWheel {
-    /// The remote source distribution from which this wheel was built.
-    pub(crate) dist: Dist,
-    /// The parsed filename.
-    pub(crate) filename: WheelFilename,
-    /// The path to the built wheel.
-    pub(crate) path: PathBuf,
-    /// The expected path to the downloaded wheel's entry in the cache.
-    /// Typically, a symlink within the wheels or built wheels bucket.
-    pub(crate) target: PathBuf,
-}
-
-/// A downloaded or built wheel.
-#[derive(Debug, Clone)]
-pub enum LocalWheel {
-    Unzipped(UnzippedWheel),
-    Disk(DiskWheel),
-    Built(BuiltWheel),
+    /// The computed hashes of the wheel.
+    pub(crate) hashes: Vec<HashDigest>,
 }
 
 impl LocalWheel {
     /// Return the path to the downloaded wheel's entry in the cache.
     pub fn target(&self) -> &Path {
-        match self {
-            Self::Unzipped(wheel) => &wheel.archive,
-            Self::Disk(wheel) => &wheel.target,
-            Self::Built(wheel) => &wheel.target,
-        }
+        &self.archive
     }
 
     /// Return the [`Dist`] from which this wheel was downloaded.
     pub fn remote(&self) -> &Dist {
-        match self {
-            Self::Unzipped(wheel) => wheel.remote(),
-            Self::Disk(wheel) => wheel.remote(),
-            Self::Built(wheel) => wheel.remote(),
-        }
+        &self.dist
     }
 
     /// Return the [`WheelFilename`] of this wheel.
     pub fn filename(&self) -> &WheelFilename {
-        match self {
-            Self::Unzipped(wheel) => &wheel.filename,
-            Self::Disk(wheel) => &wheel.filename,
-            Self::Built(wheel) => &wheel.filename,
-        }
-    }
-
-    /// Convert a [`LocalWheel`] into a [`CachedDist`].
-    pub fn into_cached_dist(self, archive: PathBuf) -> CachedDist {
-        match self {
-            Self::Unzipped(wheel) => CachedDist::from_remote(wheel.dist, wheel.filename, archive),
-            Self::Disk(wheel) => CachedDist::from_remote(wheel.dist, wheel.filename, archive),
-            Self::Built(wheel) => CachedDist::from_remote(wheel.dist, wheel.filename, archive),
-        }
+        &self.filename
     }
 
     /// Read the [`Metadata23`] from a wheel.
     pub fn metadata(&self) -> Result<Metadata23, Error> {
-        match self {
-            Self::Unzipped(wheel) => read_flat_wheel_metadata(&wheel.filename, &wheel.archive),
-            Self::Disk(wheel) => read_built_wheel_metadata(&wheel.filename, &wheel.path),
-            Self::Built(wheel) => read_built_wheel_metadata(&wheel.filename, &wheel.path),
-        }
+        read_flat_wheel_metadata(&self.filename, &self.archive)
     }
 }
 
-impl UnzippedWheel {
-    /// Return the [`Dist`] from which this wheel was downloaded.
-    pub fn remote(&self) -> &Dist {
-        &self.dist
-    }
-
-    /// Convert an [`UnzippedWheel`] into a [`CachedDist`].
-    pub fn into_cached_dist(self) -> CachedDist {
-        CachedDist::from_remote(self.dist, self.filename, self.archive)
+impl Hashed for LocalWheel {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
     }
 }
 
-impl DiskWheel {
-    /// Return the [`Dist`] from which this wheel was downloaded.
-    pub fn remote(&self) -> &Dist {
-        &self.dist
-    }
-}
-
-impl BuiltWheel {
-    /// Return the [`Dist`] from which this source distribution that this wheel was built from was
-    /// downloaded.
-    pub fn remote(&self) -> &Dist {
-        &self.dist
+/// Convert a [`LocalWheel`] into a [`CachedDist`].
+impl From<LocalWheel> for CachedDist {
+    fn from(wheel: LocalWheel) -> CachedDist {
+        CachedDist::from_remote(wheel.dist, wheel.filename, wheel.hashes, wheel.archive)
     }
 }
 
@@ -134,18 +61,6 @@ impl std::fmt::Display for LocalWheel {
     }
 }
 
-/// Read the [`Metadata23`] from a built wheel.
-fn read_built_wheel_metadata(
-    filename: &WheelFilename,
-    wheel: impl AsRef<Path>,
-) -> Result<Metadata23, Error> {
-    let file = fs_err::File::open(wheel.as_ref()).map_err(Error::CacheRead)?;
-    let reader = std::io::BufReader::new(file);
-    let mut archive = zip::ZipArchive::new(reader)?;
-    let metadata = install_wheel_rs::metadata::read_archive_metadata(filename, &mut archive)?;
-    Ok(Metadata23::parse_metadata(&metadata)?)
-}
-
 /// Read the [`Metadata23`] from an unzipped wheel.
 fn read_flat_wheel_metadata(
     filename: &WheelFilename,
diff --git a/crates/uv-distribution/src/error.rs b/crates/uv-distribution/src/error.rs
index 95b313b68..271ee66b0 100644
--- a/crates/uv-distribution/src/error.rs
+++ b/crates/uv-distribution/src/error.rs
@@ -3,6 +3,8 @@ use tokio::task::JoinError;
 use zip::result::ZipError;
 
 use distribution_filename::WheelFilenameError;
+use pep440_rs::Version;
+use pypi_types::HashDigest;
 use uv_client::BetterReqwestError;
 use uv_normalize::PackageName;
 
@@ -47,8 +49,10 @@ pub enum Error {
         given: PackageName,
         metadata: PackageName,
     },
+    #[error("Package metadata version `{metadata}` does not match given version `{given}`")]
+    VersionMismatch { given: Version, metadata: Version },
     #[error("Failed to parse metadata from built wheel")]
-    Metadata(#[from] pypi_types::Error),
+    Metadata(#[from] pypi_types::MetadataError),
     #[error("Failed to read `dist-info` metadata from built wheel")]
     DistInfo(#[from] install_wheel_rs::Error),
     #[error("Failed to read zip archive from built wheel")]
@@ -62,11 +66,11 @@ pub enum Error {
     #[error("The source distribution is missing a `PKG-INFO` file")]
     MissingPkgInfo,
     #[error("The source distribution does not support static metadata in `PKG-INFO`")]
-    DynamicPkgInfo(#[source] pypi_types::Error),
+    DynamicPkgInfo(#[source] pypi_types::MetadataError),
     #[error("The source distribution is missing a `pyproject.toml` file")]
     MissingPyprojectToml,
     #[error("The source distribution does not support static metadata in `pyproject.toml`")]
-    DynamicPyprojectToml(#[source] pypi_types::Error),
+    DynamicPyprojectToml(#[source] pypi_types::MetadataError),
     #[error("Unsupported scheme in URL: {0}")]
     UnsupportedScheme(String),
 
@@ -78,6 +82,40 @@ pub enum Error {
     /// Should not occur; only seen when another task panicked.
     #[error("The task executor is broken, did some other task panic?")]
     Join(#[from] JoinError),
+
+    /// An I/O error that occurs while exhausting a reader to compute a hash.
+    #[error("Failed to hash distribution")]
+    HashExhaustion(#[source] std::io::Error),
+
+    #[error("Hash mismatch for {distribution}\n\nExpected:\n{expected}\n\nComputed:\n{actual}")]
+    MismatchedHashes {
+        distribution: String,
+        expected: String,
+        actual: String,
+    },
+
+    #[error(
+        "Hash-checking is enabled, but no hashes were provided or computed for: {distribution}"
+    )]
+    MissingHashes { distribution: String },
+
+    #[error("Hash-checking is enabled, but no hashes were computed for: {distribution}\n\nExpected:\n{expected}")]
+    MissingActualHashes {
+        distribution: String,
+        expected: String,
+    },
+
+    #[error("Hash-checking is enabled, but no hashes were provided for: {distribution}\n\nComputed:\n{actual}")]
+    MissingExpectedHashes {
+        distribution: String,
+        actual: String,
+    },
+
+    #[error("Hash-checking is not supported for local directories: {0}")]
+    HashesNotSupportedSourceTree(String),
+
+    #[error("Hash-checking is not supported for Git repositories: {0}")]
+    HashesNotSupportedGit(String),
 }
 
 impl From<reqwest::Error> for Error {
@@ -96,3 +134,59 @@ impl From<reqwest_middleware::Error> for Error {
         }
     }
 }
+
+impl Error {
+    /// Construct a hash mismatch error.
+    pub fn hash_mismatch(
+        distribution: String,
+        expected: &[HashDigest],
+        actual: &[HashDigest],
+    ) -> Error {
+        match (expected.is_empty(), actual.is_empty()) {
+            (true, true) => Self::MissingHashes { distribution },
+            (true, false) => {
+                let actual = actual
+                    .iter()
+                    .map(|hash| format!("  {hash}"))
+                    .collect::<Vec<_>>()
+                    .join("\n");
+
+                Self::MissingExpectedHashes {
+                    distribution,
+                    actual,
+                }
+            }
+            (false, true) => {
+                let expected = expected
+                    .iter()
+                    .map(|hash| format!("  {hash}"))
+                    .collect::<Vec<_>>()
+                    .join("\n");
+
+                Self::MissingActualHashes {
+                    distribution,
+                    expected,
+                }
+            }
+            (false, false) => {
+                let expected = expected
+                    .iter()
+                    .map(|hash| format!("  {hash}"))
+                    .collect::<Vec<_>>()
+                    .join("\n");
+
+                let actual = actual
+                    .iter()
+                    .map(|hash| format!("  {hash}"))
+                    .collect::<Vec<_>>()
+                    .join("\n");
+
+                Self::MismatchedHashes {
+                    distribution,
+                    expected,
+                    actual,
+                }
+            }
+        }
+    }
+}
diff --git a/crates/uv-distribution/src/index/built_wheel_index.rs b/crates/uv-distribution/src/index/built_wheel_index.rs
index 6dde63ebe..48777ba22 100644
--- a/crates/uv-distribution/src/index/built_wheel_index.rs
+++ b/crates/uv-distribution/src/index/built_wheel_index.rs
@@ -1,52 +1,72 @@
-use distribution_types::{git_reference, DirectUrlSourceDist, GitSourceDist, PathSourceDist};
+use distribution_types::{
+    git_reference, DirectUrlSourceDist, GitSourceDist, Hashed, PathSourceDist,
+};
 use platform_tags::Tags;
 use uv_cache::{ArchiveTimestamp, Cache, CacheBucket, CacheShard, WheelCache};
 use uv_fs::symlinks;
+use uv_types::HashStrategy;
 
 use crate::index::cached_wheel::CachedWheel;
-use crate::source::{read_http_manifest, read_timestamp_manifest, MANIFEST};
+use crate::source::{HttpRevisionPointer, LocalRevisionPointer, HTTP_REVISION, LOCAL_REVISION};
 use crate::Error;
 
 /// A local index of built distributions for a specific source distribution.
-pub struct BuiltWheelIndex;
+#[derive(Debug)]
+pub struct BuiltWheelIndex<'a> {
+    cache: &'a Cache,
+    tags: &'a Tags,
+    hasher: &'a HashStrategy,
+}
+
+impl<'a> BuiltWheelIndex<'a> {
+    /// Initialize an index of built distributions.
+    pub fn new(cache: &'a Cache, tags: &'a Tags, hasher: &'a HashStrategy) -> Self {
+        Self {
+            cache,
+            tags,
+            hasher,
+        }
+    }
 
-impl BuiltWheelIndex {
     /// Return the most compatible [`CachedWheel`] for a given source distribution at a direct URL.
     ///
     /// This method does not perform any freshness checks and assumes that the source distribution
     /// is already up-to-date.
-    pub fn url(
-        source_dist: &DirectUrlSourceDist,
-        cache: &Cache,
-        tags: &Tags,
-    ) -> Result<Option<CachedWheel>, Error> {
+    pub fn url(&self, source_dist: &DirectUrlSourceDist) -> Result<Option<CachedWheel>, Error> {
         // For direct URLs, cache directly under the hash of the URL itself.
-        let cache_shard = cache.shard(
+        let cache_shard = self.cache.shard(
             CacheBucket::BuiltWheels,
             WheelCache::Url(source_dist.url.raw()).root(),
         );
 
-        // Read the manifest from the cache. There's no need to enforce freshness, since we
-        // enforce freshness on the entries.
-        let manifest_entry = cache_shard.entry(MANIFEST);
-        let Some(manifest) = read_http_manifest(&manifest_entry)? else {
+        // Read the revision from the cache.
+        let Some(pointer) = HttpRevisionPointer::read_from(cache_shard.entry(HTTP_REVISION))?
+        else {
             return Ok(None);
         };
 
-        Ok(Self::find(&cache_shard.shard(manifest.id()), tags))
+        // Enforce hash-checking by omitting any wheels that don't satisfy the required hashes.
+        let revision = pointer.into_revision();
+        if !revision.satisfies(self.hasher.get(source_dist)) {
+            return Ok(None);
+        }
+
+        Ok(self.find(&cache_shard.shard(revision.id())))
     }
 
     /// Return the most compatible [`CachedWheel`] for a given source distribution at a local path.
-    pub fn path(
-        source_dist: &PathSourceDist,
-        cache: &Cache,
-        tags: &Tags,
-    ) -> Result<Option<CachedWheel>, Error> {
-        let cache_shard = cache.shard(
+    pub fn path(&self, source_dist: &PathSourceDist) -> Result<Option<CachedWheel>, Error> {
+        let cache_shard = self.cache.shard(
             CacheBucket::BuiltWheels,
             WheelCache::Path(&source_dist.url).root(),
         );
 
+        // Read the revision from the cache.
+        let Some(pointer) = LocalRevisionPointer::read_from(cache_shard.entry(LOCAL_REVISION))?
+        else {
+            return Ok(None);
+        };
+
         // Determine the last-modified time of the source distribution.
         let Some(modified) =
             ArchiveTimestamp::from_path(&source_dist.path).map_err(Error::CacheRead)?
@@ -54,28 +74,37 @@ impl BuiltWheelIndex {
             return Err(Error::DirWithoutEntrypoint);
         };
 
-        // Read the manifest from the cache. There's no need to enforce freshness, since we
-        // enforce freshness on the entries.
-        let manifest_entry = cache_shard.entry(MANIFEST);
-        let Some(manifest) = read_timestamp_manifest(&manifest_entry, modified)? else {
+        // If the distribution is stale, omit it from the index.
+        if !pointer.is_up_to_date(modified) {
             return Ok(None);
-        };
+        }
 
-        Ok(Self::find(&cache_shard.shard(manifest.id()), tags))
+        // Enforce hash-checking by omitting any wheels that don't satisfy the required hashes.
+        let revision = pointer.into_revision();
+        if !revision.satisfies(self.hasher.get(source_dist)) {
+            return Ok(None);
+        }
+
+        Ok(self.find(&cache_shard.shard(revision.id())))
     }
 
     /// Return the most compatible [`CachedWheel`] for a given source distribution at a git URL.
-    pub fn git(source_dist: &GitSourceDist, cache: &Cache, tags: &Tags) -> Option<CachedWheel> {
+    pub fn git(&self, source_dist: &GitSourceDist) -> Option<CachedWheel> {
+        // Enforce hash-checking, which isn't supported for Git distributions.
+        if self.hasher.get(source_dist).is_validate() {
+            return None;
+        }
+
         let Ok(Some(git_sha)) = git_reference(&source_dist.url) else {
             return None;
         };
 
-        let cache_shard = cache.shard(
+        let cache_shard = self.cache.shard(
             CacheBucket::BuiltWheels,
             WheelCache::Git(&source_dist.url, &git_sha.to_short_string()).root(),
         );
 
-        Self::find(&cache_shard, tags)
+        self.find(&cache_shard)
     }
 
     /// Find the "best" distribution in the index for a given source distribution.
@@ -94,16 +123,16 @@ impl BuiltWheelIndex {
     /// ```
     ///
     /// The `shard` should be `built-wheels-v0/pypi/django-allauth-0.51.0.tar.gz`.
-    fn find(shard: &CacheShard, tags: &Tags) -> Option<CachedWheel> {
+    fn find(&self, shard: &CacheShard) -> Option<CachedWheel> {
         let mut candidate: Option<CachedWheel> = None;
 
         // Unzipped wheels are stored as symlinks into the archive directory.
         for subdir in symlinks(shard) {
-            match CachedWheel::from_path(&subdir) {
+            match CachedWheel::from_built_source(&subdir) {
                 None => {}
                 Some(dist_info) => {
                     // Pick the wheel with the highest priority
-                    let compatibility = dist_info.filename.compatibility(tags);
+                    let compatibility = dist_info.filename.compatibility(self.tags);
 
                     // Only consider wheels that are compatible with our tags.
                     if !compatibility.is_compatible() {
@@ -113,7 +142,7 @@ impl BuiltWheelIndex {
                     if let Some(existing) = candidate.as_ref() {
                         // Override if the wheel is newer, or "more" compatible.
                         if dist_info.filename.version > existing.filename.version
-                            || compatibility > existing.filename.compatibility(tags)
+                            || compatibility > existing.filename.compatibility(self.tags)
                         {
                             candidate = Some(dist_info);
                         }
diff --git a/crates/uv-distribution/src/index/cached_wheel.rs b/crates/uv-distribution/src/index/cached_wheel.rs
index a8e4172aa..5efbc817b 100644
--- a/crates/uv-distribution/src/index/cached_wheel.rs
+++ b/crates/uv-distribution/src/index/cached_wheel.rs
@@ -1,9 +1,12 @@
 use std::path::Path;
 
 use distribution_filename::WheelFilename;
-use distribution_types::{CachedDirectUrlDist, CachedRegistryDist};
+use distribution_types::{CachedDirectUrlDist, CachedRegistryDist, Hashed};
 use pep508_rs::VerbatimUrl;
-use uv_cache::CacheEntry;
+use pypi_types::HashDigest;
+use uv_cache::{Cache, CacheBucket, CacheEntry};
+
+use crate::{Archive, HttpArchivePointer, LocalArchivePointer};
 
 #[derive(Debug, Clone)]
 pub struct CachedWheel {
@@ -11,16 +14,28 @@ pub struct CachedWheel {
     pub filename: WheelFilename,
     /// The [`CacheEntry`] for the wheel.
     pub entry: CacheEntry,
+    /// The [`HashDigest`]s for the wheel.
+    pub hashes: Vec<HashDigest>,
 }
 
 impl CachedWheel {
     /// Try to parse a distribution from a cached directory name (like `typing-extensions-4.8.0-py3-none-any`).
-    pub fn from_path(path: &Path) -> Option<Self> {
+    pub fn from_built_source(path: impl AsRef<Path>) -> Option<Self> {
+        let path = path.as_ref();
+
+        // Determine the wheel filename.
         let filename = path.file_name()?.to_str()?;
         let filename = WheelFilename::from_stem(filename).ok()?;
+
+        // Convert to a cached wheel.
         let archive = path.canonicalize().ok()?;
         let entry = CacheEntry::from_path(archive);
-        Some(Self { filename, entry })
+        let hashes = Vec::new();
+        Some(Self {
+            filename,
+            entry,
+            hashes,
+        })
     }
 
     /// Convert a [`CachedWheel`] into a [`CachedRegistryDist`].
@@ -28,6 +43,7 @@ impl CachedWheel {
         CachedRegistryDist {
             filename: self.filename,
             path: self.entry.into_path_buf(),
+            hashes: self.hashes,
         }
     }
 
@@ -38,6 +54,55 @@ impl CachedWheel {
             url,
             path: self.entry.into_path_buf(),
             editable: false,
+            hashes: self.hashes,
         }
     }
+
+    /// Read a cached wheel from a `.http` pointer (e.g., `anyio-4.0.0-py3-none-any.http`).
+    pub fn from_http_pointer(path: impl AsRef<Path>, cache: &Cache) -> Option<Self> {
+        let path = path.as_ref();
+
+        // Determine the wheel filename.
+        let filename = path.file_name()?.to_str()?;
+        let filename = WheelFilename::from_stem(filename).ok()?;
+
+        // Read the pointer.
+        let pointer = HttpArchivePointer::read_from(path).ok()??;
+        let Archive { id, hashes } = pointer.into_archive();
+
+        // Convert to a cached wheel.
+        let entry = cache.entry(CacheBucket::Archive, "", id);
+        Some(Self {
+            filename,
+            entry,
+            hashes,
+        })
+    }
+
+    /// Read a cached wheel from a `.rev` pointer (e.g., `anyio-4.0.0-py3-none-any.rev`).
+    pub fn from_local_pointer(path: impl AsRef<Path>, cache: &Cache) -> Option<Self> {
+        let path = path.as_ref();
+
+        // Determine the wheel filename.
+        let filename = path.file_name()?.to_str()?;
+        let filename = WheelFilename::from_stem(filename).ok()?;
+
+        // Read the pointer.
+        let pointer = LocalArchivePointer::read_from(path).ok()??;
+        let Archive { id, hashes } = pointer.into_archive();
+
+        // Convert to a cached wheel.
+        let entry = cache.entry(CacheBucket::Archive, "", id);
+        Some(Self {
+            filename,
+            entry,
+            hashes,
+        })
+    }
+}
+
+impl Hashed for CachedWheel {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
 }
diff --git a/crates/uv-distribution/src/index/registry_wheel_index.rs b/crates/uv-distribution/src/index/registry_wheel_index.rs
index 1aa5ab017..0149a0cfb 100644
--- a/crates/uv-distribution/src/index/registry_wheel_index.rs
+++ b/crates/uv-distribution/src/index/registry_wheel_index.rs
@@ -1,19 +1,19 @@
 use std::collections::hash_map::Entry;
 use std::collections::BTreeMap;
-use std::path::Path;
 
 use rustc_hash::FxHashMap;
 
-use distribution_types::{CachedRegistryDist, FlatIndexLocation, IndexLocations, IndexUrl};
+use distribution_types::{CachedRegistryDist, FlatIndexLocation, Hashed, IndexLocations, IndexUrl};
 use pep440_rs::Version;
 use pep508_rs::VerbatimUrl;
 use platform_tags::Tags;
 use uv_cache::{Cache, CacheBucket, WheelCache};
-use uv_fs::{directories, symlinks};
+use uv_fs::{directories, files, symlinks};
 use uv_normalize::PackageName;
+use uv_types::HashStrategy;
 
 use crate::index::cached_wheel::CachedWheel;
-use crate::source::{read_http_manifest, MANIFEST};
+use crate::source::{HttpRevisionPointer, LocalRevisionPointer, HTTP_REVISION, LOCAL_REVISION};
 
 /// A local index of distributions that originate from a registry, like `PyPI`.
 #[derive(Debug)]
@@ -21,16 +21,23 @@ pub struct RegistryWheelIndex<'a> {
     cache: &'a Cache,
     tags: &'a Tags,
     index_locations: &'a IndexLocations,
+    hasher: &'a HashStrategy,
     index: FxHashMap<&'a PackageName, BTreeMap<Version, CachedRegistryDist>>,
 }
 
 impl<'a> RegistryWheelIndex<'a> {
-    /// Initialize an index of cached distributions from a directory.
-    pub fn new(cache: &'a Cache, tags: &'a Tags, index_locations: &'a IndexLocations) -> Self {
+    /// Initialize an index of registry distributions.
+    pub fn new(
+        cache: &'a Cache,
+        tags: &'a Tags,
+        index_locations: &'a IndexLocations,
+        hasher: &'a HashStrategy,
+    ) -> Self {
         Self {
             cache,
             tags,
             index_locations,
+            hasher,
             index: FxHashMap::default(),
         }
     }
@@ -65,6 +72,7 @@ impl<'a> RegistryWheelIndex<'a> {
                 self.cache,
                 self.tags,
                 self.index_locations,
+                self.hasher,
             )),
         };
         versions
@@ -76,14 +84,18 @@ impl<'a> RegistryWheelIndex<'a> {
         cache: &Cache,
         tags: &Tags,
         index_locations: &IndexLocations,
+        hasher: &HashStrategy,
     ) -> BTreeMap<Version, CachedRegistryDist> {
         let mut versions = BTreeMap::new();
 
-        // Collect into owned `IndexUrl`
+        // Collect into owned `IndexUrl`.
         let flat_index_urls: Vec<IndexUrl> = index_locations
             .flat_index()
             .filter_map(|flat_index| match flat_index {
-                FlatIndexLocation::Path(_) => None,
+                FlatIndexLocation::Path(path) => {
+                    let path = fs_err::canonicalize(path).ok()?;
+                    Some(IndexUrl::Path(VerbatimUrl::from_path(path)))
+                }
                 FlatIndexLocation::Url(url) => {
                     Some(IndexUrl::Url(VerbatimUrl::unknown(url.clone())))
                 }
@@ -97,7 +109,44 @@ impl<'a> RegistryWheelIndex<'a> {
                 WheelCache::Index(index_url).wheel_dir(package.to_string()),
             );
 
-            Self::add_directory(&wheel_dir, tags, &mut versions);
+            // For registry wheels, the cache structure is: `<index>/<package-name>/<wheel>.http`
+            // or `<index>/<package-name>/<version>/<wheel>.rev`.
+            for file in files(&wheel_dir) {
+                match index_url {
+                    // Add files from remote registries.
+                    IndexUrl::Pypi(_) | IndexUrl::Url(_) => {
+                        if file
+                            .extension()
+                            .is_some_and(|ext| ext.eq_ignore_ascii_case("http"))
+                        {
+                            if let Some(wheel) =
+                                CachedWheel::from_http_pointer(wheel_dir.join(file), cache)
+                            {
+                                // Enforce hash-checking based on the built distribution.
+                                if wheel.satisfies(hasher.get_package(package)) {
+                                    Self::add_wheel(wheel, tags, &mut versions);
+                                }
+                            }
+                        }
+                    }
+                    // Add files from local registries (e.g., `--find-links`).
+                    IndexUrl::Path(_) => {
+                        if file
+                            .extension()
+                            .is_some_and(|ext| ext.eq_ignore_ascii_case("rev"))
+                        {
+                            if let Some(wheel) =
+                                CachedWheel::from_local_pointer(wheel_dir.join(file), cache)
+                            {
+                                // Enforce hash-checking based on the built distribution.
+                                if wheel.satisfies(hasher.get_package(package)) {
+                                    Self::add_wheel(wheel, tags, &mut versions);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
 
             // Index all the built wheels, created by downloading and building source distributions
             // from the registry.
@@ -110,43 +159,62 @@ impl<'a> RegistryWheelIndex<'a> {
             for shard in directories(&cache_shard) {
                 // Read the existing metadata from the cache, if it exists.
                 let cache_shard = cache_shard.shard(shard);
-                let manifest_entry = cache_shard.entry(MANIFEST);
-                if let Ok(Some(manifest)) = read_http_manifest(&manifest_entry) {
-                    Self::add_directory(cache_shard.join(manifest.id()), tags, &mut versions);
+
+                // Read the revision from the cache.
+                let revision = match index_url {
+                    // Add files from remote registries.
+                    IndexUrl::Pypi(_) | IndexUrl::Url(_) => {
+                        let revision_entry = cache_shard.entry(HTTP_REVISION);
+                        if let Ok(Some(pointer)) = HttpRevisionPointer::read_from(revision_entry) {
+                            Some(pointer.into_revision())
+                        } else {
+                            None
+                        }
+                    }
+                    // Add files from local registries (e.g., `--find-links`).
+                    IndexUrl::Path(_) => {
+                        let revision_entry = cache_shard.entry(LOCAL_REVISION);
+                        if let Ok(Some(pointer)) = LocalRevisionPointer::read_from(revision_entry) {
+                            Some(pointer.into_revision())
+                        } else {
+                            None
+                        }
+                    }
                 };
+
+                if let Some(revision) = revision {
+                    // Enforce hash-checking based on the source distribution.
+                    if revision.satisfies(hasher.get_package(package)) {
+                        for wheel_dir in symlinks(cache_shard.join(revision.id())) {
+                            if let Some(wheel) = CachedWheel::from_built_source(wheel_dir) {
+                                Self::add_wheel(wheel, tags, &mut versions);
+                            }
+                        }
+                    }
+                }
             }
         }
 
         versions
     }
 
-    /// Add the wheels in a given directory to the index.
-    ///
-    /// Each subdirectory in the given path is expected to be that of an unzipped wheel.
-    fn add_directory(
-        path: impl AsRef<Path>,
+    /// Add the [`CachedWheel`] to the index.
+    fn add_wheel(
+        wheel: CachedWheel,
         tags: &Tags,
         versions: &mut BTreeMap<Version, CachedRegistryDist>,
     ) {
-        // Unzipped wheels are stored as symlinks into the archive directory.
-        for wheel_dir in symlinks(path.as_ref()) {
-            match CachedWheel::from_path(&wheel_dir) {
-                None => {}
-                Some(dist_info) => {
-                    let dist_info = dist_info.into_registry_dist();
+        let dist_info = wheel.into_registry_dist();
 
-                    // Pick the wheel with the highest priority
-                    let compatibility = dist_info.filename.compatibility(tags);
-                    if let Some(existing) = versions.get_mut(&dist_info.filename.version) {
-                        // Override if we have better compatibility
-                        if compatibility > existing.filename.compatibility(tags) {
-                            *existing = dist_info;
-                        }
-                    } else if compatibility.is_compatible() {
-                        versions.insert(dist_info.filename.version.clone(), dist_info);
-                    }
-                }
+        // Pick the wheel with the highest priority
+        let compatibility = dist_info.filename.compatibility(tags);
+        if let Some(existing) = versions.get_mut(&dist_info.filename.version) {
+            // Override if we have better compatibility
+            if compatibility > existing.filename.compatibility(tags) {
+                *existing = dist_info;
             }
+        } else if compatibility.is_compatible() {
+            versions.insert(dist_info.filename.version.clone(), dist_info);
         }
     }
 }
diff --git a/crates/uv-distribution/src/lib.rs b/crates/uv-distribution/src/lib.rs
index 5c04678c4..cddb2fea7 100644
--- a/crates/uv-distribution/src/lib.rs
+++ b/crates/uv-distribution/src/lib.rs
@@ -1,12 +1,14 @@
-pub use distribution_database::DistributionDatabase;
-pub use download::{BuiltWheel, DiskWheel, LocalWheel};
+pub use archive::Archive;
+pub use distribution_database::{DistributionDatabase, HttpArchivePointer, LocalArchivePointer};
+pub use download::LocalWheel;
 pub use error::Error;
 pub use git::{is_same_reference, to_precise};
 pub use index::{BuiltWheelIndex, RegistryWheelIndex};
+use pypi_types::{HashDigest, Metadata23};
 pub use reporter::Reporter;
 pub use source::SourceDistributionBuilder;
-pub use unzip::Unzip;
 
+mod archive;
 mod distribution_database;
 mod download;
 mod error;
@@ -15,4 +17,21 @@ mod index;
 mod locks;
 mod reporter;
 mod source;
-mod unzip;
+
+/// The metadata associated with an archive.
+#[derive(Debug, Clone)]
+pub struct ArchiveMetadata {
+    /// The [`Metadata23`] for the underlying distribution.
+    pub metadata: Metadata23,
+    /// The hashes of the source or built archive.
+    pub hashes: Vec<HashDigest>,
+}
+
+impl From<Metadata23> for ArchiveMetadata {
+    fn from(metadata: Metadata23) -> Self {
+        Self {
+            metadata,
+            hashes: vec![],
+        }
+    }
+}
diff --git a/crates/uv-distribution/src/source/built_wheel_metadata.rs b/crates/uv-distribution/src/source/built_wheel_metadata.rs
index a968b88d1..664e32f8f 100644
--- a/crates/uv-distribution/src/source/built_wheel_metadata.rs
+++ b/crates/uv-distribution/src/source/built_wheel_metadata.rs
@@ -2,23 +2,27 @@ use std::path::PathBuf;
 use std::str::FromStr;
 
 use distribution_filename::WheelFilename;
+use distribution_types::Hashed;
 use platform_tags::Tags;
+use pypi_types::HashDigest;
 use uv_cache::CacheShard;
 use uv_fs::files;
 
 /// The information about the wheel we either just built or got from the cache.
 #[derive(Debug, Clone)]
-pub struct BuiltWheelMetadata {
+pub(crate) struct BuiltWheelMetadata {
     /// The path to the built wheel.
     pub(crate) path: PathBuf,
     /// The expected path to the downloaded wheel's entry in the cache.
     pub(crate) target: PathBuf,
     /// The parsed filename.
     pub(crate) filename: WheelFilename,
+    /// The computed hashes of the source distribution from which the wheel was built.
+    pub(crate) hashes: Vec<HashDigest>,
 }
 
 impl BuiltWheelMetadata {
-    /// Find a compatible wheel in the cache based on the given manifest.
+    /// Find a compatible wheel in the cache.
     pub(crate) fn find_in_cache(tags: &Tags, cache_shard: &CacheShard) -> Option<Self> {
         for directory in files(cache_shard) {
             if let Some(metadata) = Self::from_path(directory, cache_shard) {
@@ -39,6 +43,20 @@ impl BuiltWheelMetadata {
             target: cache_shard.join(filename.stem()),
             path,
             filename,
+            hashes: vec![],
         })
     }
+
+    /// Set the computed hashes of the wheel.
+    #[must_use]
+    pub(crate) fn with_hashes(mut self, hashes: Vec<HashDigest>) -> Self {
+        self.hashes = hashes;
+        self
+    }
+}
+
+impl Hashed for BuiltWheelMetadata {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
 }
diff --git a/crates/uv-distribution/src/source/manifest.rs b/crates/uv-distribution/src/source/manifest.rs
deleted file mode 100644
index ba1085986..000000000
--- a/crates/uv-distribution/src/source/manifest.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-/// The [`Manifest`] is a thin wrapper around a unique identifier for the source distribution.
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub(crate) struct Manifest(String);
-
-impl Manifest {
-    /// Initialize a new [`Manifest`] with a random UUID.
-    pub(crate) fn new() -> Self {
-        Self(nanoid::nanoid!())
-    }
-
-    /// Return the unique ID of the manifest.
-    pub(crate) fn id(&self) -> &str {
-        &self.0
-    }
-}
diff --git a/crates/uv-distribution/src/source/mod.rs b/crates/uv-distribution/src/source/mod.rs
index 2ff2873e9..474211f4c 100644
--- a/crates/uv-distribution/src/source/mod.rs
+++ b/crates/uv-distribution/src/source/mod.rs
@@ -9,7 +9,6 @@ use anyhow::Result;
 use fs_err::tokio as fs;
 use futures::{FutureExt, TryStreamExt};
 use reqwest::Response;
-use tempfile::TempDir;
 use tokio_util::compat::FuturesAsyncReadCompatExt;
 use tracing::{debug, info_span, instrument, Instrument};
 use url::Url;
@@ -17,30 +16,32 @@ use zip::ZipArchive;
 
 use distribution_filename::WheelFilename;
 use distribution_types::{
-    BuildableSource, DirectArchiveUrl, Dist, FileLocation, GitSourceUrl, LocalEditable,
-    PathSourceDist, PathSourceUrl, RemoteSource, SourceDist, SourceUrl,
+    BuildableSource, DirectArchiveUrl, Dist, FileLocation, GitSourceUrl, HashPolicy, Hashed,
+    LocalEditable, PathSourceDist, PathSourceUrl, RemoteSource, SourceDist, SourceUrl,
 };
 use install_wheel_rs::metadata::read_archive_metadata;
 use platform_tags::Tags;
-use pypi_types::Metadata23;
+use pypi_types::{HashDigest, Metadata23};
 use uv_cache::{
-    ArchiveTimestamp, Cache, CacheBucket, CacheEntry, CacheShard, CachedByTimestamp, Freshness,
+    ArchiveTimestamp, CacheBucket, CacheEntry, CacheShard, CachedByTimestamp, Freshness, Timestamp,
     WheelCache,
 };
 use uv_client::{
     CacheControl, CachedClientError, Connectivity, DataWithCachePolicy, RegistryClient,
 };
+use uv_configuration::{BuildKind, NoBuild};
+use uv_extract::hash::Hasher;
 use uv_fs::write_atomic;
-use uv_types::{BuildContext, BuildKind, NoBuild, SourceBuildTrait};
+use uv_types::{BuildContext, SourceBuildTrait};
 
 use crate::error::Error;
 use crate::git::{fetch_git_archive, resolve_precise};
 use crate::source::built_wheel_metadata::BuiltWheelMetadata;
-use crate::source::manifest::Manifest;
-use crate::Reporter;
+use crate::source::revision::Revision;
+use crate::{ArchiveMetadata, Reporter};
 
 mod built_wheel_metadata;
-mod manifest;
+mod revision;
 
 /// Fetch and build a source distribution from a remote source, or from a local cache.
 pub struct SourceDistributionBuilder<'a, T: BuildContext> {
@@ -49,8 +50,11 @@ pub struct SourceDistributionBuilder<'a, T: BuildContext> {
     reporter: Option<Arc<dyn Reporter>>,
 }
 
-/// The name of the file that contains the cached manifest, encoded via `MsgPack`.
-pub(crate) const MANIFEST: &str = "manifest.msgpack";
+/// The name of the file that contains the revision ID for a remote distribution, encoded via `MsgPack`.
+pub(crate) const HTTP_REVISION: &str = "revision.http";
+
+/// The name of the file that contains the revision ID for a local distribution, encoded via `MsgPack`.
+pub(crate) const LOCAL_REVISION: &str = "revision.rev";
 
 /// The name of the file that contains the cached distribution metadata, encoded via `MsgPack`.
 pub(crate) const METADATA: &str = "metadata.msgpack";
@@ -75,41 +79,14 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
     }
 
     /// Download and build a [`SourceDist`].
-    pub async fn download_and_build(
+    pub(super) async fn download_and_build(
         &self,
         source: &BuildableSource<'_>,
         tags: &Tags,
+        hashes: HashPolicy<'_>,
     ) -> Result<BuiltWheelMetadata, Error> {
         let built_wheel_metadata = match &source {
             BuildableSource::Dist(SourceDist::Registry(dist)) => {
-                let url = match &dist.file.url {
-                    FileLocation::RelativeUrl(base, url) => {
-                        pypi_types::base_url_join_relative(base, url)?
-                    }
-                    FileLocation::AbsoluteUrl(url) => {
-                        Url::parse(url).map_err(|err| Error::Url(url.clone(), err))?
-                    }
-                    FileLocation::Path(path) => {
-                        let url = Url::from_file_path(path).expect("path is absolute");
-
-                        // If necessary, extract the archive.
-                        let extracted = extract_archive(path, self.build_context.cache()).await?;
-
-                        return self
-                            .path(
-                                source,
-                                &PathSourceUrl {
-                                    url: &url,
-                                    path: Cow::Borrowed(path),
-                                },
-                                extracted.path(),
-                                tags,
-                            )
-                            .boxed()
-                            .await;
-                    }
-                };
-
                 // For registry source distributions, shard by package, then version, for
                 // convenience in debugging.
                 let cache_shard = self.build_context.cache().shard(
@@ -119,93 +96,6 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                         .join(dist.filename.version.to_string()),
                 );
 
-                self.url(source, &dist.file.filename, &url, &cache_shard, None, tags)
-                    .boxed()
-                    .await?
-            }
-            BuildableSource::Dist(SourceDist::DirectUrl(dist)) => {
-                let filename = dist.filename().expect("Distribution must have a filename");
-                let DirectArchiveUrl { url, subdirectory } = DirectArchiveUrl::from(dist.url.raw());
-
-                // For direct URLs, cache directly under the hash of the URL itself.
-                let cache_shard = self
-                    .build_context
-                    .cache()
-                    .shard(CacheBucket::BuiltWheels, WheelCache::Url(&url).root());
-
-                self.url(
-                    source,
-                    &filename,
-                    &url,
-                    &cache_shard,
-                    subdirectory.as_deref(),
-                    tags,
-                )
-                .boxed()
-                .await?
-            }
-            BuildableSource::Dist(SourceDist::Git(dist)) => {
-                self.git(source, &GitSourceUrl::from(dist), tags)
-                    .boxed()
-                    .await?
-            }
-            BuildableSource::Dist(SourceDist::Path(dist)) => {
-                // If necessary, extract the archive.
-                let extracted = extract_archive(&dist.path, self.build_context.cache()).await?;
-
-                self.path(source, &PathSourceUrl::from(dist), extracted.path(), tags)
-                    .boxed()
-                    .await?
-            }
-            BuildableSource::Url(SourceUrl::Direct(resource)) => {
-                let filename = resource
-                    .url
-                    .filename()
-                    .expect("Distribution must have a filename");
-                let DirectArchiveUrl { url, subdirectory } = DirectArchiveUrl::from(resource.url);
-
-                // For direct URLs, cache directly under the hash of the URL itself.
-                let cache_shard = self
-                    .build_context
-                    .cache()
-                    .shard(CacheBucket::BuiltWheels, WheelCache::Url(&url).root());
-
-                self.url(
-                    source,
-                    &filename,
-                    &url,
-                    &cache_shard,
-                    subdirectory.as_deref(),
-                    tags,
-                )
-                .boxed()
-                .await?
-            }
-            BuildableSource::Url(SourceUrl::Git(resource)) => {
-                self.git(source, resource, tags).boxed().await?
-            }
-            BuildableSource::Url(SourceUrl::Path(resource)) => {
-                // If necessary, extract the archive.
-                let extracted = extract_archive(&resource.path, self.build_context.cache()).await?;
-
-                self.path(source, resource, extracted.path(), tags)
-                    .boxed()
-                    .await?
-            }
-        };
-
-        Ok(built_wheel_metadata)
-    }
-
-    /// Download a [`SourceDist`] and determine its metadata. This typically involves building the
-    /// source distribution into a wheel; however, some build backends support determining the
-    /// metadata without building the source distribution.
-    pub async fn download_and_build_metadata(
-        &self,
-        source: &BuildableSource<'_>,
-    ) -> Result<Metadata23, Error> {
-        let metadata = match &source {
-            BuildableSource::Dist(SourceDist::Registry(dist)) => {
                 let url = match &dist.file.url {
                     FileLocation::RelativeUrl(base, url) => {
                         pypi_types::base_url_join_relative(base, url)?
@@ -215,24 +105,140 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     }
                     FileLocation::Path(path) => {
                         let url = Url::from_file_path(path).expect("path is absolute");
-
-                        // If necessary, extract the archive.
-                        let extracted = extract_archive(path, self.build_context.cache()).await?;
-
                         return self
-                            .path_metadata(
+                            .archive(
                                 source,
                                 &PathSourceUrl {
                                     url: &url,
                                     path: Cow::Borrowed(path),
                                 },
-                                extracted.path(),
+                                &cache_shard,
+                                tags,
+                                hashes,
                             )
                             .boxed()
                             .await;
                     }
                 };
 
+                self.url(
+                    source,
+                    &dist.file.filename,
+                    &url,
+                    &cache_shard,
+                    None,
+                    tags,
+                    hashes,
+                )
+                .boxed()
+                .await?
+            }
+            BuildableSource::Dist(SourceDist::DirectUrl(dist)) => {
+                let filename = dist.filename().expect("Distribution must have a filename");
+                let DirectArchiveUrl { url, subdirectory } = DirectArchiveUrl::from(dist.url.raw());
+
+                // For direct URLs, cache directly under the hash of the URL itself.
+                let cache_shard = self
+                    .build_context
+                    .cache()
+                    .shard(CacheBucket::BuiltWheels, WheelCache::Url(&url).root());
+
+                self.url(
+                    source,
+                    &filename,
+                    &url,
+                    &cache_shard,
+                    subdirectory.as_deref(),
+                    tags,
+                    hashes,
+                )
+                .boxed()
+                .await?
+            }
+            BuildableSource::Dist(SourceDist::Git(dist)) => {
+                self.git(source, &GitSourceUrl::from(dist), tags, hashes)
+                    .boxed()
+                    .await?
+            }
+            BuildableSource::Dist(SourceDist::Path(dist)) => {
+                if dist.path.is_dir() {
+                    self.source_tree(source, &PathSourceUrl::from(dist), tags, hashes)
+                        .boxed()
+                        .await?
+                } else {
+                    let cache_shard = self
+                        .build_context
+                        .cache()
+                        .shard(CacheBucket::BuiltWheels, WheelCache::Path(&dist.url).root());
+                    self.archive(
+                        source,
+                        &PathSourceUrl::from(dist),
+                        &cache_shard,
+                        tags,
+                        hashes,
+                    )
+                    .boxed()
+                    .await?
+                }
+            }
+            BuildableSource::Url(SourceUrl::Direct(resource)) => {
+                let filename = resource
+                    .url
+                    .filename()
+                    .expect("Distribution must have a filename");
+                let DirectArchiveUrl { url, subdirectory } = DirectArchiveUrl::from(resource.url);
+
+                // For direct URLs, cache directly under the hash of the URL itself.
+                let cache_shard = self
+                    .build_context
+                    .cache()
+                    .shard(CacheBucket::BuiltWheels, WheelCache::Url(&url).root());
+
+                self.url(
+                    source,
+                    &filename,
+                    &url,
+                    &cache_shard,
+                    subdirectory.as_deref(),
+                    tags,
+                    hashes,
+                )
+                .boxed()
+                .await?
+            }
+            BuildableSource::Url(SourceUrl::Git(resource)) => {
+                self.git(source, resource, tags, hashes).boxed().await?
+            }
+            BuildableSource::Url(SourceUrl::Path(resource)) => {
+                if resource.path.is_dir() {
+                    self.source_tree(source, resource, tags, hashes)
+                        .boxed()
+                        .await?
+                } else {
+                    let cache_shard = self.build_context.cache().shard(
+                        CacheBucket::BuiltWheels,
+                        WheelCache::Path(resource.url).root(),
+                    );
+                    self.archive(source, resource, &cache_shard, tags, hashes)
+                        .boxed()
+                        .await?
+                }
+            }
+        };
+
+        Ok(built_wheel_metadata)
+    }
+
+    /// Download a [`SourceDist`] and determine its metadata. This typically involves building the
+    /// source distribution into a wheel; however, some build backends support determining the
+    /// metadata without building the source distribution.
+    pub(super) async fn download_and_build_metadata(
+        &self,
+        source: &BuildableSource<'_>,
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        let metadata = match &source {
+            BuildableSource::Dist(SourceDist::Registry(dist)) => {
                 // For registry source distributions, shard by package, then version.
                 let cache_shard = self.build_context.cache().shard(
                     CacheBucket::BuiltWheels,
@@ -241,9 +247,40 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                         .join(dist.filename.version.to_string()),
                 );
 
-                self.url_metadata(source, &dist.file.filename, &url, &cache_shard, None)
-                    .boxed()
-                    .await?
+                let url = match &dist.file.url {
+                    FileLocation::RelativeUrl(base, url) => {
+                        pypi_types::base_url_join_relative(base, url)?
+                    }
+                    FileLocation::AbsoluteUrl(url) => {
+                        Url::parse(url).map_err(|err| Error::Url(url.clone(), err))?
+                    }
+                    FileLocation::Path(path) => {
+                        let url = Url::from_file_path(path).expect("path is absolute");
+                        return self
+                            .archive_metadata(
+                                source,
+                                &PathSourceUrl {
+                                    url: &url,
+                                    path: Cow::Borrowed(path),
+                                },
+                                &cache_shard,
+                                hashes,
+                            )
+                            .boxed()
+                            .await;
+                    }
+                };
+
+                self.url_metadata(
+                    source,
+                    &dist.file.filename,
+                    &url,
+                    &cache_shard,
+                    None,
+                    hashes,
+                )
+                .boxed()
+                .await?
             }
             BuildableSource::Dist(SourceDist::DirectUrl(dist)) => {
                 let filename = dist.filename().expect("Distribution must have a filename");
@@ -261,22 +298,30 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     &url,
                     &cache_shard,
                     subdirectory.as_deref(),
+                    hashes,
                 )
                 .boxed()
                 .await?
             }
             BuildableSource::Dist(SourceDist::Git(dist)) => {
-                self.git_metadata(source, &GitSourceUrl::from(dist))
+                self.git_metadata(source, &GitSourceUrl::from(dist), hashes)
                     .boxed()
                     .await?
             }
             BuildableSource::Dist(SourceDist::Path(dist)) => {
-                // If necessary, extract the archive.
-                let extracted = extract_archive(&dist.path, self.build_context.cache()).await?;
-
-                self.path_metadata(source, &PathSourceUrl::from(dist), extracted.path())
-                    .boxed()
-                    .await?
+                if dist.path.is_dir() {
+                    self.source_tree_metadata(source, &PathSourceUrl::from(dist), hashes)
+                        .boxed()
+                        .await?
+                } else {
+                    let cache_shard = self
+                        .build_context
+                        .cache()
+                        .shard(CacheBucket::BuiltWheels, WheelCache::Path(&dist.url).root());
+                    self.archive_metadata(source, &PathSourceUrl::from(dist), &cache_shard, hashes)
+                        .boxed()
+                        .await?
+                }
             }
             BuildableSource::Url(SourceUrl::Direct(resource)) => {
                 let filename = resource
@@ -297,20 +342,28 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     &url,
                     &cache_shard,
                     subdirectory.as_deref(),
+                    hashes,
                 )
                 .boxed()
                 .await?
             }
             BuildableSource::Url(SourceUrl::Git(resource)) => {
-                self.git_metadata(source, resource).boxed().await?
+                self.git_metadata(source, resource, hashes).boxed().await?
             }
             BuildableSource::Url(SourceUrl::Path(resource)) => {
-                // If necessary, extract the archive.
-                let extracted = extract_archive(&resource.path, self.build_context.cache()).await?;
-
-                self.path_metadata(source, resource, extracted.path())
-                    .boxed()
-                    .await?
+                if resource.path.is_dir() {
+                    self.source_tree_metadata(source, resource, hashes)
+                        .boxed()
+                        .await?
+                } else {
+                    let cache_shard = self.build_context.cache().shard(
+                        CacheBucket::BuiltWheels,
+                        WheelCache::Path(resource.url).root(),
+                    );
+                    self.archive_metadata(source, resource, &cache_shard, hashes)
+                        .boxed()
+                        .await?
+                }
             }
         };
 
@@ -327,66 +380,29 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         cache_shard: &CacheShard,
         subdirectory: Option<&'data Path>,
         tags: &Tags,
+        hashes: HashPolicy<'_>,
     ) -> Result<BuiltWheelMetadata, Error> {
-        let cache_entry = cache_shard.entry(MANIFEST);
-        let cache_control = match self.client.connectivity() {
-            Connectivity::Online => CacheControl::from(
-                self.build_context
-                    .cache()
-                    .freshness(&cache_entry, source.name())
-                    .map_err(Error::CacheRead)?,
-            ),
-            Connectivity::Offline => CacheControl::AllowStale,
-        };
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .url_revision(source, filename, url, cache_shard, hashes)
+            .await?;
 
-        let download = |response| {
-            async {
-                // At this point, we're seeing a new or updated source distribution. Initialize a
-                // new manifest, to collect the source and built artifacts.
-                let manifest = Manifest::new();
+        // Before running the build, check that the hashes match.
+        if !revision.satisfies(hashes) {
+            return Err(Error::hash_mismatch(
+                source.to_string(),
+                hashes.digests(),
+                revision.hashes(),
+            ));
+        }
 
-                // Download the source distribution.
-                debug!("Downloading source distribution: {source}");
-                let source_dist_entry = cache_shard.shard(manifest.id()).entry(filename);
-                self.persist_url(response, source, filename, &source_dist_entry)
-                    .await?;
-
-                Ok(manifest)
-            }
-            .boxed()
-            .instrument(info_span!("download", source_dist = %source))
-        };
-        let req = self
-            .client
-            .uncached_client()
-            .get(url.clone())
-            .header(
-                // `reqwest` defaults to accepting compressed responses.
-                // Specify identity encoding to get consistent .whl downloading
-                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
-                "accept-encoding",
-                reqwest::header::HeaderValue::from_static("identity"),
-            )
-            .build()?;
-        let manifest = self
-            .client
-            .cached_client()
-            .get_serde(req, &cache_entry, cache_control, download)
-            .await
-            .map_err(|err| match err {
-                CachedClientError::Callback(err) => err,
-                CachedClientError::Client(err) => Error::Client(err),
-            })?;
-
-        // From here on, scope all operations to the current build. Within the manifest shard,
-        // there's no need to check for freshness, since entries have to be fresher than the
-        // manifest itself. There's also no need to lock, since we never replace entries within the
-        // shard.
-        let cache_shard = cache_shard.shard(manifest.id());
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
 
         // If the cache contains a compatible wheel, return it.
         if let Some(built_wheel) = BuiltWheelMetadata::find_in_cache(tags, &cache_shard) {
-            return Ok(built_wheel);
+            return Ok(built_wheel.with_hashes(revision.into_hashes()));
         }
 
         let task = self
@@ -416,6 +432,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             path: cache_shard.join(&disk_filename),
             target: cache_shard.join(wheel_filename.stem()),
             filename: wheel_filename,
+            hashes: revision.into_hashes(),
         })
     }
 
@@ -431,68 +448,34 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         url: &'data Url,
         cache_shard: &CacheShard,
         subdirectory: Option<&'data Path>,
-    ) -> Result<Metadata23, Error> {
-        let cache_entry = cache_shard.entry(MANIFEST);
-        let cache_control = match self.client.connectivity() {
-            Connectivity::Online => CacheControl::from(
-                self.build_context
-                    .cache()
-                    .freshness(&cache_entry, source.name())
-                    .map_err(Error::CacheRead)?,
-            ),
-            Connectivity::Offline => CacheControl::AllowStale,
-        };
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .url_revision(source, filename, url, cache_shard, hashes)
+            .await?;
 
-        let download = |response| {
-            async {
-                // At this point, we're seeing a new or updated source distribution. Initialize a
-                // new manifest, to collect the source and built artifacts.
-                let manifest = Manifest::new();
+        // Before running the build, check that the hashes match.
+        if !revision.satisfies(hashes) {
+            return Err(Error::hash_mismatch(
+                source.to_string(),
+                hashes.digests(),
+                revision.hashes(),
+            ));
+        }
 
-                // Download the source distribution.
-                debug!("Downloading source distribution: {source}");
-                let source_dist_entry = cache_shard.shard(manifest.id()).entry(filename);
-                self.persist_url(response, source, filename, &source_dist_entry)
-                    .await?;
-
-                Ok(manifest)
-            }
-            .boxed()
-            .instrument(info_span!("download", source_dist = %source))
-        };
-        let req = self
-            .client
-            .uncached_client()
-            .get(url.clone())
-            .header(
-                // `reqwest` defaults to accepting compressed responses.
-                // Specify identity encoding to get consistent .whl downloading
-                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
-                "accept-encoding",
-                reqwest::header::HeaderValue::from_static("identity"),
-            )
-            .build()?;
-        let manifest = self
-            .client
-            .cached_client()
-            .get_serde(req, &cache_entry, cache_control, download)
-            .await
-            .map_err(|err| match err {
-                CachedClientError::Callback(err) => err,
-                CachedClientError::Client(err) => Error::Client(err),
-            })?;
-
-        // From here on, scope all operations to the current build. Within the manifest shard,
-        // there's no need to check for freshness, since entries have to be fresher than the
-        // manifest itself. There's also no need to lock, since we never replace entries within the
-        // shard.
-        let cache_shard = cache_shard.shard(manifest.id());
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
 
         // If the cache contains compatible metadata, return it.
         let metadata_entry = cache_shard.entry(METADATA);
         if let Some(metadata) = read_cached_metadata(&metadata_entry).await? {
             debug!("Using cached metadata for: {source}");
-            return Ok(metadata);
+            return Ok(ArchiveMetadata {
+                metadata,
+                hashes: revision.into_hashes(),
+            });
         }
 
         // Otherwise, we either need to build the metadata or the wheel.
@@ -513,7 +496,10 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 .await
                 .map_err(Error::CacheWrite)?;
 
-            return Ok(metadata);
+            return Ok(ArchiveMetadata {
+                metadata,
+                hashes: revision.into_hashes(),
+            });
         }
 
         let task = self
@@ -538,50 +524,110 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             }
         }
 
-        Ok(metadata)
+        Ok(ArchiveMetadata {
+            metadata,
+            hashes: revision.into_hashes(),
+        })
     }
 
-    /// Build a source distribution from a local path.
-    async fn path(
+    /// Return the [`Revision`] for a remote URL, refreshing it if necessary.
+    async fn url_revision(
+        &self,
+        source: &BuildableSource<'_>,
+        filename: &str,
+        url: &Url,
+        cache_shard: &CacheShard,
+        hashes: HashPolicy<'_>,
+    ) -> Result<Revision, Error> {
+        let cache_entry = cache_shard.entry(HTTP_REVISION);
+        let cache_control = match self.client.connectivity() {
+            Connectivity::Online => CacheControl::from(
+                self.build_context
+                    .cache()
+                    .freshness(&cache_entry, source.name())
+                    .map_err(Error::CacheRead)?,
+            ),
+            Connectivity::Offline => CacheControl::AllowStale,
+        };
+
+        let download = |response| {
+            async {
+                // At this point, we're seeing a new or updated source distribution. Initialize a
+                // new revision, to collect the source and built artifacts.
+                let revision = Revision::new();
+
+                // Download the source distribution.
+                debug!("Downloading source distribution: {source}");
+                let entry = cache_shard.shard(revision.id()).entry(filename);
+                let hashes = self
+                    .download_archive(response, source, filename, entry.path(), hashes)
+                    .await?;
+
+                Ok(revision.with_hashes(hashes))
+            }
+            .boxed()
+            .instrument(info_span!("download", source_dist = %source))
+        };
+        let req = self.request(url.clone())?;
+        let revision = self
+            .client
+            .cached_client()
+            .get_serde(req, &cache_entry, cache_control, download)
+            .await
+            .map_err(|err| match err {
+                CachedClientError::Callback(err) => err,
+                CachedClientError::Client(err) => Error::Client(err),
+            })?;
+
+        // If the archive is missing the required hashes, force a refresh.
+        if revision.has_digests(hashes) {
+            Ok(revision)
+        } else {
+            self.client
+                .cached_client()
+                .skip_cache(self.request(url.clone())?, &cache_entry, download)
+                .await
+                .map_err(|err| match err {
+                    CachedClientError::Callback(err) => err,
+                    CachedClientError::Client(err) => Error::Client(err),
+                })
+        }
+    }
+
+    /// Build a source distribution from a local archive (e.g., `.tar.gz` or `.zip`).
+    async fn archive(
         &self,
         source: &BuildableSource<'_>,
         resource: &PathSourceUrl<'_>,
-        source_root: &Path,
+        cache_shard: &CacheShard,
         tags: &Tags,
+        hashes: HashPolicy<'_>,
     ) -> Result<BuiltWheelMetadata, Error> {
-        let cache_shard = self.build_context.cache().shard(
-            CacheBucket::BuiltWheels,
-            WheelCache::Path(resource.url).root(),
-        );
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .archive_revision(source, resource, cache_shard, hashes)
+            .await?;
 
-        // Determine the last-modified time of the source distribution.
-        let Some(modified) =
-            ArchiveTimestamp::from_path(&resource.path).map_err(Error::CacheRead)?
-        else {
-            return Err(Error::DirWithoutEntrypoint);
-        };
+        // Before running the build, check that the hashes match.
+        if !revision.satisfies(hashes) {
+            return Err(Error::hash_mismatch(
+                source.to_string(),
+                hashes.digests(),
+                revision.hashes(),
+            ));
+        }
 
-        // Read the existing metadata from the cache.
-        let manifest_entry = cache_shard.entry(MANIFEST);
-        let manifest_freshness = self
-            .build_context
-            .cache()
-            .freshness(&manifest_entry, source.name())
-            .map_err(Error::CacheRead)?;
-        let manifest =
-            refresh_timestamp_manifest(&manifest_entry, manifest_freshness, modified).await?;
-
-        // From here on, scope all operations to the current build. Within the manifest shard,
-        // there's no need to check for freshness, since entries have to be fresher than the
-        // manifest itself. There's also no need to lock, since we never replace entries within the
-        // shard.
-        let cache_shard = cache_shard.shard(manifest.id());
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
 
         // If the cache contains a compatible wheel, return it.
         if let Some(built_wheel) = BuiltWheelMetadata::find_in_cache(tags, &cache_shard) {
             return Ok(built_wheel);
         }
 
+        let source_entry = cache_shard.entry("source");
+
         // Otherwise, we need to build a wheel.
         let task = self
             .reporter
@@ -589,7 +635,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             .map(|reporter| reporter.on_build_start(source));
 
         let (disk_filename, filename, metadata) = self
-            .build_distribution(source, source_root, None, &cache_shard)
+            .build_distribution(source, source_entry.path(), None, &cache_shard)
             .await?;
 
         if let Some(task) = task {
@@ -608,64 +654,54 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             path: cache_shard.join(&disk_filename),
             target: cache_shard.join(filename.stem()),
             filename,
+            hashes: revision.into_hashes(),
         })
     }
 
-    /// Build the source distribution's metadata from a local path.
+    /// Build the source distribution's metadata from a local archive (e.g., `.tar.gz` or `.zip`).
     ///
     /// If the build backend supports `prepare_metadata_for_build_wheel`, this method will avoid
     /// building the wheel.
-    async fn path_metadata(
+    async fn archive_metadata(
         &self,
         source: &BuildableSource<'_>,
         resource: &PathSourceUrl<'_>,
-        source_root: &Path,
-    ) -> Result<Metadata23, Error> {
-        let cache_shard = self.build_context.cache().shard(
-            CacheBucket::BuiltWheels,
-            WheelCache::Path(resource.url).root(),
-        );
+        cache_shard: &CacheShard,
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .archive_revision(source, resource, cache_shard, hashes)
+            .await?;
 
-        // Determine the last-modified time of the source distribution.
-        let Some(modified) =
-            ArchiveTimestamp::from_path(&resource.path).map_err(Error::CacheRead)?
-        else {
-            return Err(Error::DirWithoutEntrypoint);
-        };
+        // Before running the build, check that the hashes match.
+        if !revision.satisfies(hashes) {
+            return Err(Error::hash_mismatch(
+                source.to_string(),
+                hashes.digests(),
+                revision.hashes(),
+            ));
+        }
 
-        // Read the existing metadata from the cache, to clear stale entries.
-        let manifest_entry = cache_shard.entry(MANIFEST);
-        let manifest_freshness = self
-            .build_context
-            .cache()
-            .freshness(&manifest_entry, source.name())
-            .map_err(Error::CacheRead)?;
-        let manifest =
-            refresh_timestamp_manifest(&manifest_entry, manifest_freshness, modified).await?;
-
-        // From here on, scope all operations to the current build. Within the manifest shard,
-        // there's no need to check for freshness, since entries have to be fresher than the
-        // manifest itself. There's also no need to lock, since we never replace entries within the
-        // shard.
-        let cache_shard = cache_shard.shard(manifest.id());
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
 
         // If the cache contains compatible metadata, return it.
         let metadata_entry = cache_shard.entry(METADATA);
-        if self
-            .build_context
-            .cache()
-            .freshness(&metadata_entry, source.name())
-            .is_ok_and(Freshness::is_fresh)
-        {
-            if let Some(metadata) = read_cached_metadata(&metadata_entry).await? {
-                debug!("Using cached metadata for: {source}");
-                return Ok(metadata);
-            }
+        if let Some(metadata) = read_cached_metadata(&metadata_entry).await? {
+            debug!("Using cached metadata for: {source}");
+            return Ok(ArchiveMetadata {
+                metadata,
+                hashes: revision.into_hashes(),
+            });
         }
 
+        let source_entry = cache_shard.entry("source");
+
         // If the backend supports `prepare_metadata_for_build_wheel`, use it.
         if let Some(metadata) = self
-            .build_metadata(source, source_root, None)
+            .build_metadata(source, source_entry.path(), None)
             .boxed()
             .await?
         {
@@ -678,7 +714,10 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 .await
                 .map_err(Error::CacheWrite)?;
 
-            return Ok(metadata);
+            return Ok(ArchiveMetadata {
+                metadata,
+                hashes: revision.into_hashes(),
+            });
         }
 
         // Otherwise, we need to build a wheel.
@@ -688,7 +727,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             .map(|reporter| reporter.on_build_start(source));
 
         let (_disk_filename, _filename, metadata) = self
-            .build_distribution(source, source_root, None, &cache_shard)
+            .build_distribution(source, source_entry.path(), None, &cache_shard)
             .await?;
 
         if let Some(task) = task {
@@ -703,7 +742,243 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             .await
             .map_err(Error::CacheWrite)?;
 
-        Ok(metadata)
+        Ok(ArchiveMetadata {
+            metadata,
+            hashes: revision.into_hashes(),
+        })
+    }
+
+    /// Return the [`Revision`] for a local archive, refreshing it if necessary.
+    async fn archive_revision(
+        &self,
+        source: &BuildableSource<'_>,
+        resource: &PathSourceUrl<'_>,
+        cache_shard: &CacheShard,
+        hashes: HashPolicy<'_>,
+    ) -> Result<Revision, Error> {
+        // Determine the last-modified time of the source distribution.
+        let modified = ArchiveTimestamp::from_file(&resource.path).map_err(Error::CacheRead)?;
+
+        // Read the existing metadata from the cache.
+        let revision_entry = cache_shard.entry(LOCAL_REVISION);
+
+        // If the revision already exists, return it. There's no need to check for freshness, since
+        // we use an exact timestamp.
+        if let Some(pointer) = LocalRevisionPointer::read_from(&revision_entry)? {
+            if pointer.is_up_to_date(modified) {
+                let revision = pointer.into_revision();
+                if revision.has_digests(hashes) {
+                    return Ok(revision);
+                }
+            }
+        }
+
+        // Otherwise, we need to create a new revision.
+        let revision = Revision::new();
+
+        // Unzip the archive to a temporary directory.
+        debug!("Unpacking source distribution: {source}");
+        let entry = cache_shard.shard(revision.id()).entry("source");
+        let hashes = self
+            .persist_archive(&resource.path, entry.path(), hashes)
+            .await?;
+        let revision = revision.with_hashes(hashes);
+
+        // Persist the revision.
+        write_atomic(
+            revision_entry.path(),
+            rmp_serde::to_vec(&CachedByTimestamp {
+                timestamp: modified.timestamp(),
+                data: revision.clone(),
+            })?,
+        )
+        .await
+        .map_err(Error::CacheWrite)?;
+
+        Ok(revision)
+    }
+
+    /// Build a source distribution from a local source tree (i.e., directory).
+    async fn source_tree(
+        &self,
+        source: &BuildableSource<'_>,
+        resource: &PathSourceUrl<'_>,
+        tags: &Tags,
+        hashes: HashPolicy<'_>,
+    ) -> Result<BuiltWheelMetadata, Error> {
+        // Before running the build, check that the hashes match.
+        if hashes.is_validate() {
+            return Err(Error::HashesNotSupportedSourceTree(source.to_string()));
+        }
+
+        let cache_shard = self.build_context.cache().shard(
+            CacheBucket::BuiltWheels,
+            WheelCache::Path(resource.url).root(),
+        );
+
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .source_tree_revision(source, resource, &cache_shard)
+            .await?;
+
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
+
+        // If the cache contains a compatible wheel, return it.
+        if let Some(built_wheel) = BuiltWheelMetadata::find_in_cache(tags, &cache_shard) {
+            return Ok(built_wheel);
+        }
+
+        // Otherwise, we need to build a wheel.
+        let task = self
+            .reporter
+            .as_ref()
+            .map(|reporter| reporter.on_build_start(source));
+
+        let (disk_filename, filename, metadata) = self
+            .build_distribution(source, &resource.path, None, &cache_shard)
+            .await?;
+
+        if let Some(task) = task {
+            if let Some(reporter) = self.reporter.as_ref() {
+                reporter.on_build_complete(source, task);
+            }
+        }
+
+        // Store the metadata.
+        let metadata_entry = cache_shard.entry(METADATA);
+        write_atomic(metadata_entry.path(), rmp_serde::to_vec(&metadata)?)
+            .await
+            .map_err(Error::CacheWrite)?;
+
+        Ok(BuiltWheelMetadata {
+            path: cache_shard.join(&disk_filename),
+            target: cache_shard.join(filename.stem()),
+            filename,
+            hashes: vec![],
+        })
+    }
+
+    /// Build the source distribution's metadata from a local source tree (i.e., a directory).
+    ///
+    /// If the build backend supports `prepare_metadata_for_build_wheel`, this method will avoid
+    /// building the wheel.
+    async fn source_tree_metadata(
+        &self,
+        source: &BuildableSource<'_>,
+        resource: &PathSourceUrl<'_>,
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        // Before running the build, check that the hashes match.
+        if hashes.is_validate() {
+            return Err(Error::HashesNotSupportedSourceTree(source.to_string()));
+        }
+
+        let cache_shard = self.build_context.cache().shard(
+            CacheBucket::BuiltWheels,
+            WheelCache::Path(resource.url).root(),
+        );
+
+        // Fetch the revision for the source distribution.
+        let revision = self
+            .source_tree_revision(source, resource, &cache_shard)
+            .await?;
+
+        // Scope all operations to the revision. Within the revision, there's no need to check for
+        // freshness, since entries have to be fresher than the revision itself.
+        let cache_shard = cache_shard.shard(revision.id());
+
+        // If the cache contains compatible metadata, return it.
+        let metadata_entry = cache_shard.entry(METADATA);
+        if let Some(metadata) = read_cached_metadata(&metadata_entry).await? {
+            debug!("Using cached metadata for: {source}");
+            return Ok(ArchiveMetadata::from(metadata));
+        }
+
+        // If the backend supports `prepare_metadata_for_build_wheel`, use it.
+        if let Some(metadata) = self
+            .build_metadata(source, &resource.path, None)
+            .boxed()
+            .await?
+        {
+            // Store the metadata.
+            let cache_entry = cache_shard.entry(METADATA);
+            fs::create_dir_all(cache_entry.dir())
+                .await
+                .map_err(Error::CacheWrite)?;
+            write_atomic(cache_entry.path(), rmp_serde::to_vec(&metadata)?)
+                .await
+                .map_err(Error::CacheWrite)?;
+
+            return Ok(ArchiveMetadata::from(metadata));
+        }
+
+        // Otherwise, we need to build a wheel.
+        let task = self
+            .reporter
+            .as_ref()
+            .map(|reporter| reporter.on_build_start(source));
+
+        let (_disk_filename, _filename, metadata) = self
+            .build_distribution(source, &resource.path, None, &cache_shard)
+            .await?;
+
+        if let Some(task) = task {
+            if let Some(reporter) = self.reporter.as_ref() {
+                reporter.on_build_complete(source, task);
+            }
+        }
+
+        // Store the metadata.
+        let metadata_entry = cache_shard.entry(METADATA);
+        write_atomic(metadata_entry.path(), rmp_serde::to_vec(&metadata)?)
+            .await
+            .map_err(Error::CacheWrite)?;
+
+        Ok(ArchiveMetadata::from(metadata))
+    }
+
+    /// Return the [`Revision`] for a local source tree, refreshing it if necessary.
+    async fn source_tree_revision(
+        &self,
+        source: &BuildableSource<'_>,
+        resource: &PathSourceUrl<'_>,
+        cache_shard: &CacheShard,
+    ) -> Result<Revision, Error> {
+        // Determine the last-modified time of the source distribution.
+        let Some(modified) =
+            ArchiveTimestamp::from_path(&resource.path).map_err(Error::CacheRead)?
+        else {
+            return Err(Error::DirWithoutEntrypoint);
+        };
+
+        // Read the existing metadata from the cache.
+        let entry = cache_shard.entry(LOCAL_REVISION);
+        let freshness = self
+            .build_context
+            .cache()
+            .freshness(&entry, source.name())
+            .map_err(Error::CacheRead)?;
+
+        // If the revision is fresh, return it.
+        if freshness.is_fresh() {
+            if let Some(pointer) = LocalRevisionPointer::read_from(&entry)? {
+                if pointer.timestamp == modified.timestamp() {
+                    return Ok(pointer.into_revision());
+                }
+            }
+        }
+
+        // Otherwise, we need to create a new revision.
+        let revision = Revision::new();
+        let pointer = LocalRevisionPointer {
+            timestamp: modified.timestamp(),
+            revision: revision.clone(),
+        };
+        pointer.write_to(&entry).await?;
+
+        Ok(revision)
     }
 
     /// Build a source distribution from a Git repository.
@@ -712,7 +987,13 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         source: &BuildableSource<'_>,
         resource: &GitSourceUrl<'_>,
         tags: &Tags,
+        hashes: HashPolicy<'_>,
     ) -> Result<BuiltWheelMetadata, Error> {
+        // Before running the build, check that the hashes match.
+        if hashes.is_validate() {
+            return Err(Error::HashesNotSupportedGit(source.to_string()));
+        }
+
         // Resolve to a precise Git SHA.
         let url = if let Some(url) = resolve_precise(
             resource.url,
@@ -766,6 +1047,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             path: cache_shard.join(&disk_filename),
             target: cache_shard.join(filename.stem()),
             filename,
+            hashes: vec![],
         })
     }
 
@@ -777,7 +1059,13 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         &self,
         source: &BuildableSource<'_>,
         resource: &GitSourceUrl<'_>,
-    ) -> Result<Metadata23, Error> {
+        hashes: HashPolicy<'_>,
+    ) -> Result<ArchiveMetadata, Error> {
+        // Before running the build, check that the hashes match.
+        if hashes.is_validate() {
+            return Err(Error::HashesNotSupportedGit(source.to_string()));
+        }
+
         // Resolve to a precise Git SHA.
         let url = if let Some(url) = resolve_precise(
             resource.url,
@@ -811,7 +1099,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         {
             if let Some(metadata) = read_cached_metadata(&metadata_entry).await? {
                 debug!("Using cached metadata for: {source}");
-                return Ok(metadata);
+                return Ok(ArchiveMetadata::from(metadata));
             }
         }
 
@@ -830,7 +1118,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 .await
                 .map_err(Error::CacheWrite)?;
 
-            return Ok(metadata);
+            return Ok(ArchiveMetadata::from(metadata));
         }
 
         // Otherwise, we need to build a wheel.
@@ -855,25 +1143,18 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             .await
             .map_err(Error::CacheWrite)?;
 
-        Ok(metadata)
+        Ok(ArchiveMetadata::from(metadata))
     }
 
     /// Download and unzip a source distribution into the cache from an HTTP response.
-    async fn persist_url<'data>(
+    async fn download_archive(
         &self,
         response: Response,
         source: &BuildableSource<'_>,
         filename: &str,
-        cache_entry: &'data CacheEntry,
-    ) -> Result<&'data Path, Error> {
-        let cache_path = cache_entry.path();
-        if cache_path.is_dir() {
-            debug!("Distribution is already cached: {source}");
-            return Ok(cache_path);
-        }
-
-        // Download and unzip the source distribution into a temporary directory.
-        let span = info_span!("download_source_dist", filename = filename, source_dist = %source);
+        target: &Path,
+        hashes: HashPolicy<'_>,
+    ) -> Result<Vec<HashDigest>, Error> {
         let temp_dir =
             tempfile::tempdir_in(self.build_context.cache().bucket(CacheBucket::BuiltWheels))
                 .map_err(Error::CacheWrite)?;
@@ -881,9 +1162,24 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             .bytes_stream()
             .map_err(|err| std::io::Error::new(std::io::ErrorKind::Other, err))
             .into_async_read();
-        uv_extract::stream::archive(reader.compat(), filename, temp_dir.path()).await?;
+
+        // Create a hasher for each hash algorithm.
+        let algorithms = hashes.algorithms();
+        let mut hashers = algorithms.into_iter().map(Hasher::from).collect::<Vec<_>>();
+        let mut hasher = uv_extract::hash::HashReader::new(reader.compat(), &mut hashers);
+
+        // Download and unzip the source distribution into a temporary directory.
+        let span = info_span!("download_source_dist", filename = filename, source_dist = %source);
+        uv_extract::stream::archive(&mut hasher, filename, temp_dir.path()).await?;
         drop(span);
 
+        // If necessary, exhaust the reader to compute the hash.
+        if !hashes.is_none() {
+            hasher.finish().await.map_err(Error::HashExhaustion)?;
+        }
+
+        let hashes = hashers.into_iter().map(HashDigest::from).collect();
+
         // Extract the top-level directory.
         let extracted = match uv_extract::strip_component(temp_dir.path()) {
             Ok(top_level) => top_level,
@@ -892,20 +1188,69 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         };
 
         // Persist it to the cache.
-        fs_err::tokio::create_dir_all(cache_path.parent().expect("Cache entry to have parent"))
+        fs_err::tokio::create_dir_all(target.parent().expect("Cache entry to have parent"))
             .await
             .map_err(Error::CacheWrite)?;
-        fs_err::tokio::rename(extracted, &cache_path)
+        fs_err::tokio::rename(extracted, target)
             .await
             .map_err(Error::CacheWrite)?;
 
-        Ok(cache_path)
+        Ok(hashes)
+    }
+
+    /// Extract a local archive, and store it at the given [`CacheEntry`].
+    async fn persist_archive(
+        &self,
+        path: &Path,
+        target: &Path,
+        hashes: HashPolicy<'_>,
+    ) -> Result<Vec<HashDigest>, Error> {
+        debug!("Unpacking for build: {}", path.display());
+
+        let temp_dir =
+            tempfile::tempdir_in(self.build_context.cache().bucket(CacheBucket::BuiltWheels))
+                .map_err(Error::CacheWrite)?;
+        let reader = fs_err::tokio::File::open(&path)
+            .await
+            .map_err(Error::CacheRead)?;
+
+        // Create a hasher for each hash algorithm.
+        let algorithms = hashes.algorithms();
+        let mut hashers = algorithms.into_iter().map(Hasher::from).collect::<Vec<_>>();
+        let mut hasher = uv_extract::hash::HashReader::new(reader, &mut hashers);
+
+        // Unzip the archive into a temporary directory.
+        uv_extract::stream::archive(&mut hasher, path, &temp_dir.path()).await?;
+
+        // If necessary, exhaust the reader to compute the hash.
+        if !hashes.is_none() {
+            hasher.finish().await.map_err(Error::HashExhaustion)?;
+        }
+
+        let hashes = hashers.into_iter().map(HashDigest::from).collect();
+
+        // Extract the top-level directory from the archive.
+        let extracted = match uv_extract::strip_component(temp_dir.path()) {
+            Ok(top_level) => top_level,
+            Err(uv_extract::Error::NonSingularArchive(_)) => temp_dir.path().to_path_buf(),
+            Err(err) => return Err(err.into()),
+        };
+
+        // Persist it to the cache.
+        fs_err::tokio::create_dir_all(target.parent().expect("Cache entry to have parent"))
+            .await
+            .map_err(Error::CacheWrite)?;
+        fs_err::tokio::rename(extracted, &target)
+            .await
+            .map_err(Error::CacheWrite)?;
+
+        Ok(hashes)
     }
 
     /// Build a source distribution, storing the built wheel in the cache.
     ///
     /// Returns the un-normalized disk filename, the parsed, normalized filename and the metadata
-    #[instrument(skip_all, fields(dist))]
+    #[instrument(skip_all, fields(dist = %source))]
     async fn build_distribution(
         &self,
         source: &BuildableSource<'_>,
@@ -951,21 +1296,14 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         let metadata = read_wheel_metadata(&filename, cache_shard.join(&disk_filename))?;
 
         // Validate the metadata.
-        if let Some(name) = source.name() {
-            if metadata.name != *name {
-                return Err(Error::NameMismatch {
-                    metadata: metadata.name,
-                    given: name.clone(),
-                });
-            }
-        }
+        validate(source, &metadata)?;
 
         debug!("Finished building: {source}");
         Ok((disk_filename, filename, metadata))
     }
 
     /// Build the metadata for a source distribution.
-    #[instrument(skip_all, fields(dist))]
+    #[instrument(skip_all, fields(dist = %source))]
     async fn build_metadata(
         &self,
         source: &BuildableSource<'_>,
@@ -980,14 +1318,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 debug!("Found static `PKG-INFO` for: {source}");
 
                 // Validate the metadata.
-                if let Some(name) = source.name() {
-                    if metadata.name != *name {
-                        return Err(Error::NameMismatch {
-                            metadata: metadata.name,
-                            given: name.clone(),
-                        });
-                    }
-                }
+                validate(source, &metadata)?;
 
                 return Ok(Some(metadata));
             }
@@ -1003,14 +1334,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 debug!("Found static `pyproject.toml` for: {source}");
 
                 // Validate the metadata.
-                if let Some(name) = source.name() {
-                    if metadata.name != *name {
-                        return Err(Error::NameMismatch {
-                            metadata: metadata.name,
-                            given: name.clone(),
-                        });
-                    }
-                }
+                validate(source, &metadata)?;
 
                 return Ok(Some(metadata));
             }
@@ -1050,14 +1374,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         let metadata = Metadata23::parse_metadata(&content)?;
 
         // Validate the metadata.
-        if let Some(name) = source.name() {
-            if metadata.name != *name {
-                return Err(Error::NameMismatch {
-                    metadata: metadata.name,
-                    given: name.clone(),
-                });
-            }
-        }
+        validate(source, &metadata)?;
 
         Ok(Some(metadata))
     }
@@ -1103,35 +1420,120 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
         debug!("Finished building (editable): {dist}");
         Ok((dist, disk_filename, filename, metadata))
     }
+
+    /// Returns a GET [`reqwest::Request`] for the given URL.
+    fn request(&self, url: Url) -> Result<reqwest::Request, reqwest::Error> {
+        self.client
+            .uncached_client()
+            .get(url)
+            .header(
+                // `reqwest` defaults to accepting compressed responses.
+                // Specify identity encoding to get consistent .whl downloading
+                // behavior from servers. ref: https://github.com/pypa/pip/pull/1688
+                "accept-encoding",
+                reqwest::header::HeaderValue::from_static("identity"),
+            )
+            .build()
+    }
 }
 
-#[derive(Debug)]
-enum ExtractedSource {
-    /// The source distribution was passed in as a directory, and so doesn't need to be extracted.
-    Directory(PathBuf),
-    /// The source distribution was passed in as an archive, and was extracted into a temporary
-    /// directory.
-    ///
-    /// The extracted archive and temporary directory will be deleted when the `ExtractedSource` is
-    /// dropped.
-    #[allow(dead_code)]
-    Archive(PathBuf, TempDir),
-}
-
-impl ExtractedSource {
-    /// Return the [`Path`] to the extracted source root.
-    fn path(&self) -> &Path {
-        match self {
-            ExtractedSource::Directory(path) => path,
-            ExtractedSource::Archive(path, _) => path,
+/// Validate that the source distribution matches the built metadata.
+fn validate(source: &BuildableSource<'_>, metadata: &Metadata23) -> Result<(), Error> {
+    if let Some(name) = source.name() {
+        if metadata.name != *name {
+            return Err(Error::NameMismatch {
+                metadata: metadata.name.clone(),
+                given: name.clone(),
+            });
         }
     }
+
+    if let Some(version) = source.version() {
+        if metadata.version != *version {
+            return Err(Error::VersionMismatch {
+                metadata: metadata.version.clone(),
+                given: version.clone(),
+            });
+        }
+    }
+
+    Ok(())
+}
+
+/// A pointer to a source distribution revision in the cache, fetched from an HTTP archive.
+///
+/// Encoded with `MsgPack`, and represented on disk by a `.http` file.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub(crate) struct HttpRevisionPointer {
+    revision: Revision,
+}
+
+impl HttpRevisionPointer {
+    /// Read an [`HttpRevisionPointer`] from the cache.
+    pub(crate) fn read_from(path: impl AsRef<Path>) -> Result<Option<Self>, Error> {
+        match fs_err::File::open(path.as_ref()) {
+            Ok(file) => {
+                let data = DataWithCachePolicy::from_reader(file)?.data;
+                let revision = rmp_serde::from_slice::<Revision>(&data)?;
+                Ok(Some(Self { revision }))
+            }
+            Err(err) if err.kind() == std::io::ErrorKind::NotFound => Ok(None),
+            Err(err) => Err(Error::CacheRead(err)),
+        }
+    }
+
+    /// Return the [`Revision`] from the pointer.
+    pub(crate) fn into_revision(self) -> Revision {
+        self.revision
+    }
+}
+
+/// A pointer to a source distribution revision in the cache, fetched from a local path.
+///
+/// Encoded with `MsgPack`, and represented on disk by a `.rev` file.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub(crate) struct LocalRevisionPointer {
+    timestamp: Timestamp,
+    revision: Revision,
+}
+
+impl LocalRevisionPointer {
+    /// Read an [`LocalRevisionPointer`] from the cache.
+    pub(crate) fn read_from(path: impl AsRef<Path>) -> Result<Option<Self>, Error> {
+        match fs_err::read(path) {
+            Ok(cached) => Ok(Some(rmp_serde::from_slice::<LocalRevisionPointer>(
+                &cached,
+            )?)),
+            Err(err) if err.kind() == std::io::ErrorKind::NotFound => Ok(None),
+            Err(err) => Err(Error::CacheRead(err)),
+        }
+    }
+
+    /// Write an [`LocalRevisionPointer`] to the cache.
+    async fn write_to(&self, entry: &CacheEntry) -> Result<(), Error> {
+        fs::create_dir_all(&entry.dir())
+            .await
+            .map_err(Error::CacheWrite)?;
+        write_atomic(entry.path(), rmp_serde::to_vec(&self)?)
+            .await
+            .map_err(Error::CacheWrite)
+    }
+
+    /// Returns `true` if the revision is up-to-date with the given modified timestamp.
+    pub(crate) fn is_up_to_date(&self, modified: ArchiveTimestamp) -> bool {
+        self.timestamp == modified.timestamp()
+    }
+
+    /// Return the [`Revision`] from the pointer.
+    pub(crate) fn into_revision(self) -> Revision {
+        self.revision
+    }
 }
 
 /// Read the [`Metadata23`] from a source distribution's `PKG-INFO` file, if it uses Metadata 2.2
 /// or later _and_ none of the required fields (`Requires-Python`, `Requires-Dist`, and
 /// `Provides-Extra`) are marked as dynamic.
-pub(crate) async fn read_pkg_info(
+async fn read_pkg_info(
     source_tree: &Path,
     subdirectory: Option<&Path>,
 ) -> Result<Metadata23, Error> {
@@ -1156,7 +1558,7 @@ pub(crate) async fn read_pkg_info(
 
 /// Read the [`Metadata23`] from a source distribution's `pyproject.tom` file, if it defines static
 /// metadata consistent with PEP 621.
-pub(crate) async fn read_pyproject_toml(
+async fn read_pyproject_toml(
     source_tree: &Path,
     subdirectory: Option<&Path>,
 ) -> Result<Metadata23, Error> {
@@ -1180,75 +1582,8 @@ pub(crate) async fn read_pyproject_toml(
     Ok(metadata)
 }
 
-/// Read an existing HTTP-cached [`Manifest`], if it exists.
-pub(crate) fn read_http_manifest(cache_entry: &CacheEntry) -> Result<Option<Manifest>, Error> {
-    match fs_err::File::open(cache_entry.path()) {
-        Ok(file) => {
-            let data = DataWithCachePolicy::from_reader(file)?.data;
-            Ok(Some(rmp_serde::from_slice::<Manifest>(&data)?))
-        }
-        Err(err) if err.kind() == std::io::ErrorKind::NotFound => Ok(None),
-        Err(err) => Err(Error::CacheRead(err)),
-    }
-}
-
-/// Read an existing timestamped [`Manifest`], if it exists and is up-to-date.
-///
-/// If the cache entry is stale, a new entry will be created.
-pub(crate) fn read_timestamp_manifest(
-    cache_entry: &CacheEntry,
-    modified: ArchiveTimestamp,
-) -> Result<Option<Manifest>, Error> {
-    // If the cache entry is up-to-date, return it.
-    match fs_err::read(cache_entry.path()) {
-        Ok(cached) => {
-            let cached = rmp_serde::from_slice::<CachedByTimestamp<Manifest>>(&cached)?;
-            if cached.timestamp == modified.timestamp() {
-                return Ok(Some(cached.data));
-            }
-        }
-        Err(err) if err.kind() == std::io::ErrorKind::NotFound => {}
-        Err(err) => return Err(Error::CacheRead(err)),
-    }
-    Ok(None)
-}
-
-/// Read an existing timestamped [`Manifest`], if it exists and is up-to-date.
-///
-/// If the cache entry is stale, a new entry will be created.
-pub(crate) async fn refresh_timestamp_manifest(
-    cache_entry: &CacheEntry,
-    freshness: Freshness,
-    modified: ArchiveTimestamp,
-) -> Result<Manifest, Error> {
-    // If we know the exact modification time, we don't need to force a revalidate.
-    if matches!(modified, ArchiveTimestamp::Exact(_)) || freshness.is_fresh() {
-        if let Some(manifest) = read_timestamp_manifest(cache_entry, modified)? {
-            return Ok(manifest);
-        }
-    }
-
-    // Otherwise, create a new manifest.
-    let manifest = Manifest::new();
-    fs::create_dir_all(&cache_entry.dir())
-        .await
-        .map_err(Error::CacheWrite)?;
-    write_atomic(
-        cache_entry.path(),
-        rmp_serde::to_vec(&CachedByTimestamp {
-            timestamp: modified.timestamp(),
-            data: manifest.clone(),
-        })?,
-    )
-    .await
-    .map_err(Error::CacheWrite)?;
-    Ok(manifest)
-}
-
 /// Read an existing cached [`Metadata23`], if it exists.
-pub(crate) async fn read_cached_metadata(
-    cache_entry: &CacheEntry,
-) -> Result<Option<Metadata23>, Error> {
+async fn read_cached_metadata(cache_entry: &CacheEntry) -> Result<Option<Metadata23>, Error> {
     match fs::read(&cache_entry.path()).await {
         Ok(cached) => Ok(Some(rmp_serde::from_slice::<Metadata23>(&cached)?)),
         Err(err) if err.kind() == std::io::ErrorKind::NotFound => Ok(None),
@@ -1267,42 +1602,3 @@ fn read_wheel_metadata(
     let dist_info = read_archive_metadata(filename, &mut archive)?;
     Ok(Metadata23::parse_metadata(&dist_info)?)
 }
-
-/// Extract a local source distribution, if it's stored as a `.tar.gz` or `.zip` archive.
-///
-/// TODO(charlie): Consider storing the extracted source in the cache, to avoid re-extracting
-/// on every invocation.
-async fn extract_archive(path: &Path, cache: &Cache) -> Result<ExtractedSource, Error> {
-    let metadata = match fs::metadata(&path).await {
-        Ok(metadata) => metadata,
-        Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
-            return Err(Error::NotFound(path.to_path_buf()));
-        }
-        Err(err) => return Err(Error::CacheRead(err)),
-    };
-
-    if metadata.is_dir() {
-        Ok(ExtractedSource::Directory(path.to_path_buf()))
-    } else {
-        debug!("Unpacking for build: {}", path.display());
-
-        let temp_dir = tempfile::tempdir_in(cache.bucket(CacheBucket::BuiltWheels))
-            .map_err(Error::CacheWrite)?;
-
-        // Unzip the archive into the temporary directory.
-        let reader = fs_err::tokio::File::open(&path)
-            .await
-            .map_err(Error::CacheRead)?;
-        uv_extract::seek::archive(tokio::io::BufReader::new(reader), path, &temp_dir.path())
-            .await?;
-
-        // Extract the top-level directory from the archive.
-        let extracted = match uv_extract::strip_component(temp_dir.path()) {
-            Ok(top_level) => top_level,
-            Err(uv_extract::Error::NonSingularArchive(_)) => temp_dir.path().to_path_buf(),
-            Err(err) => return Err(err.into()),
-        };
-
-        Ok(ExtractedSource::Archive(extracted, temp_dir))
-    }
-}
diff --git a/crates/uv-distribution/src/source/revision.rs b/crates/uv-distribution/src/source/revision.rs
new file mode 100644
index 000000000..64cbc127b
--- /dev/null
+++ b/crates/uv-distribution/src/source/revision.rs
@@ -0,0 +1,72 @@
+use distribution_types::Hashed;
+use serde::{Deserialize, Serialize};
+use std::path::Path;
+
+use pypi_types::HashDigest;
+
+/// The [`Revision`] is a thin wrapper around a unique identifier for the source distribution.
+///
+/// A revision represents a unique version of a source distribution, at a level more granular than
+/// (e.g.) the version number of the distribution itself. For example, a source distribution hosted
+/// at a URL or a local file path may have multiple revisions, each representing a unique state of
+/// the distribution, despite the reported version number remaining the same.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) struct Revision {
+    id: RevisionId,
+    hashes: Vec<HashDigest>,
+}
+
+impl Revision {
+    /// Initialize a new [`Revision`] with a random UUID.
+    pub(crate) fn new() -> Self {
+        Self {
+            id: RevisionId::new(),
+            hashes: vec![],
+        }
+    }
+
+    /// Return the unique ID of the manifest.
+    pub(crate) fn id(&self) -> &RevisionId {
+        &self.id
+    }
+
+    /// Return the computed hashes of the archive.
+    pub(crate) fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
+
+    /// Return the computed hashes of the archive.
+    pub(crate) fn into_hashes(self) -> Vec<HashDigest> {
+        self.hashes
+    }
+
+    /// Set the computed hashes of the archive.
+    #[must_use]
+    pub(crate) fn with_hashes(mut self, hashes: Vec<HashDigest>) -> Self {
+        self.hashes = hashes;
+        self
+    }
+}
+
+impl Hashed for Revision {
+    fn hashes(&self) -> &[HashDigest] {
+        &self.hashes
+    }
+}
+
+/// A unique identifier for a revision of a source distribution.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub(crate) struct RevisionId(String);
+
+impl RevisionId {
+    /// Generate a new unique identifier for an archive.
+    fn new() -> Self {
+        Self(nanoid::nanoid!())
+    }
+}
+
+impl AsRef<Path> for RevisionId {
+    fn as_ref(&self) -> &Path {
+        self.0.as_ref()
+    }
+}
diff --git a/crates/uv-distribution/src/unzip.rs b/crates/uv-distribution/src/unzip.rs
deleted file mode 100644
index 92f5b4867..000000000
--- a/crates/uv-distribution/src/unzip.rs
+++ /dev/null
@@ -1,36 +0,0 @@
-use std::path::Path;
-
-use tracing::instrument;
-
-use uv_extract::Error;
-
-use crate::download::BuiltWheel;
-use crate::{DiskWheel, LocalWheel};
-
-pub trait Unzip {
-    /// Unzip a wheel into the target directory.
-    fn unzip(&self, target: &Path) -> Result<(), Error>;
-}
-
-impl Unzip for DiskWheel {
-    fn unzip(&self, target: &Path) -> Result<(), Error> {
-        uv_extract::unzip(fs_err::File::open(&self.path)?, target)
-    }
-}
-
-impl Unzip for BuiltWheel {
-    fn unzip(&self, target: &Path) -> Result<(), Error> {
-        uv_extract::unzip(fs_err::File::open(&self.path)?, target)
-    }
-}
-
-impl Unzip for LocalWheel {
-    #[instrument(skip_all, fields(filename=self.filename().to_string()))]
-    fn unzip(&self, target: &Path) -> Result<(), Error> {
-        match self {
-            Self::Unzipped(_) => Ok(()),
-            Self::Disk(wheel) => wheel.unzip(target),
-            Self::Built(wheel) => wheel.unzip(target),
-        }
-    }
-}
diff --git a/crates/uv-extract/Cargo.toml b/crates/uv-extract/Cargo.toml
index ca0704c4c..0c3dbb8fb 100644
--- a/crates/uv-extract/Cargo.toml
+++ b/crates/uv-extract/Cargo.toml
@@ -13,12 +13,16 @@ license = { workspace = true }
 workspace = true
 
 [dependencies]
-async-compression = { workspace = true, features = ["gzip"] }
+pypi-types = { workspace = true }
+
+async-compression = { workspace = true, features = ["gzip", "zstd"] }
 async_zip = { workspace = true, features = ["tokio"] }
 fs-err = { workspace = true, features = ["tokio"] }
 futures = { workspace = true }
+md-5.workspace = true
 rayon = { workspace = true }
 rustc-hash = { workspace = true }
+sha2 = { workspace = true }
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["io-util"] }
 tokio-tar = { workspace = true }
diff --git a/crates/uv-extract/src/hash.rs b/crates/uv-extract/src/hash.rs
new file mode 100644
index 000000000..22072f7c8
--- /dev/null
+++ b/crates/uv-extract/src/hash.rs
@@ -0,0 +1,146 @@
+use std::pin::Pin;
+use std::task::{Context, Poll};
+
+use sha2::Digest;
+use tokio::io::{AsyncReadExt, ReadBuf};
+
+use pypi_types::{HashAlgorithm, HashDigest};
+
+pub struct Sha256Reader<'a, R> {
+    reader: R,
+    hasher: &'a mut sha2::Sha256,
+}
+
+impl<'a, R> Sha256Reader<'a, R>
+where
+    R: tokio::io::AsyncRead + Unpin,
+{
+    pub fn new(reader: R, hasher: &'a mut sha2::Sha256) -> Self {
+        Sha256Reader { reader, hasher }
+    }
+}
+
+impl<'a, R> tokio::io::AsyncRead for Sha256Reader<'a, R>
+where
+    R: tokio::io::AsyncRead + Unpin,
+{
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<std::io::Result<()>> {
+        let reader = Pin::new(&mut self.reader);
+        match reader.poll_read(cx, buf) {
+            Poll::Ready(Ok(())) => {
+                self.hasher.update(buf.filled());
+                Poll::Ready(Ok(()))
+            }
+            other => other,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum Hasher {
+    Md5(md5::Md5),
+    Sha256(sha2::Sha256),
+    Sha384(sha2::Sha384),
+    Sha512(sha2::Sha512),
+}
+
+impl Hasher {
+    pub fn update(&mut self, data: &[u8]) {
+        match self {
+            Hasher::Md5(hasher) => hasher.update(data),
+            Hasher::Sha256(hasher) => hasher.update(data),
+            Hasher::Sha384(hasher) => hasher.update(data),
+            Hasher::Sha512(hasher) => hasher.update(data),
+        }
+    }
+
+    pub fn finalize(self) -> Vec<u8> {
+        match self {
+            Hasher::Md5(hasher) => hasher.finalize().to_vec(),
+            Hasher::Sha256(hasher) => hasher.finalize().to_vec(),
+            Hasher::Sha384(hasher) => hasher.finalize().to_vec(),
+            Hasher::Sha512(hasher) => hasher.finalize().to_vec(),
+        }
+    }
+}
+
+impl From<HashAlgorithm> for Hasher {
+    fn from(algorithm: HashAlgorithm) -> Self {
+        match algorithm {
+            HashAlgorithm::Md5 => Hasher::Md5(md5::Md5::new()),
+            HashAlgorithm::Sha256 => Hasher::Sha256(sha2::Sha256::new()),
+            HashAlgorithm::Sha384 => Hasher::Sha384(sha2::Sha384::new()),
+            HashAlgorithm::Sha512 => Hasher::Sha512(sha2::Sha512::new()),
+        }
+    }
+}
+
+impl From<Hasher> for HashDigest {
+    fn from(hasher: Hasher) -> Self {
+        match hasher {
+            Hasher::Md5(hasher) => HashDigest {
+                algorithm: HashAlgorithm::Md5,
+                digest: format!("{:x}", hasher.finalize()).into_boxed_str(),
+            },
+            Hasher::Sha256(hasher) => HashDigest {
+                algorithm: HashAlgorithm::Sha256,
+                digest: format!("{:x}", hasher.finalize()).into_boxed_str(),
+            },
+            Hasher::Sha384(hasher) => HashDigest {
+                algorithm: HashAlgorithm::Sha384,
+                digest: format!("{:x}", hasher.finalize()).into_boxed_str(),
+            },
+            Hasher::Sha512(hasher) => HashDigest {
+                algorithm: HashAlgorithm::Sha512,
+                digest: format!("{:x}", hasher.finalize()).into_boxed_str(),
+            },
+        }
+    }
+}
+
+pub struct HashReader<'a, R> {
+    reader: R,
+    hashers: &'a mut [Hasher],
+}
+
+impl<'a, R> HashReader<'a, R>
+where
+    R: tokio::io::AsyncRead + Unpin,
+{
+    pub fn new(reader: R, hashers: &'a mut [Hasher]) -> Self {
+        HashReader { reader, hashers }
+    }
+
+    /// Exhaust the underlying reader.
+    pub async fn finish(&mut self) -> Result<(), std::io::Error> {
+        while self.read(&mut vec![0; 8192]).await? > 0 {}
+
+        Ok(())
+    }
+}
+
+impl<'a, R> tokio::io::AsyncRead for HashReader<'a, R>
+where
+    R: tokio::io::AsyncRead + Unpin,
+{
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<std::io::Result<()>> {
+        let reader = Pin::new(&mut self.reader);
+        match reader.poll_read(cx, buf) {
+            Poll::Ready(Ok(())) => {
+                for hasher in self.hashers.iter_mut() {
+                    hasher.update(buf.filled());
+                }
+                Poll::Ready(Ok(()))
+            }
+            other => other,
+        }
+    }
+}
diff --git a/crates/uv-extract/src/lib.rs b/crates/uv-extract/src/lib.rs
index 20d433071..192aaa8e0 100644
--- a/crates/uv-extract/src/lib.rs
+++ b/crates/uv-extract/src/lib.rs
@@ -2,6 +2,7 @@ pub use error::Error;
 pub use sync::*;
 
 mod error;
+pub mod hash;
 pub mod seek;
 pub mod stream;
 mod sync;
diff --git a/crates/uv-extract/src/seek.rs b/crates/uv-extract/src/seek.rs
index c4adbbb6c..57499fc86 100644
--- a/crates/uv-extract/src/seek.rs
+++ b/crates/uv-extract/src/seek.rs
@@ -14,7 +14,7 @@ pub async fn unzip<R: tokio::io::AsyncRead + tokio::io::AsyncSeek + Unpin>(
     target: impl AsRef<Path>,
 ) -> Result<(), Error> {
     let target = target.as_ref();
-    let mut reader = reader.compat();
+    let mut reader = futures::io::BufReader::new(reader.compat());
     let mut zip = async_zip::base::read::seek::ZipFileReader::new(&mut reader).await?;
 
     let mut directories = FxHashSet::default();
@@ -81,7 +81,7 @@ pub async fn unzip<R: tokio::io::AsyncRead + tokio::io::AsyncSeek + Unpin>(
 }
 
 /// Unzip a `.zip` or `.tar.gz` archive into the target directory, requiring `Seek`.
-pub async fn archive<R: tokio::io::AsyncBufRead + tokio::io::AsyncSeek + Unpin>(
+pub async fn archive<R: tokio::io::AsyncRead + tokio::io::AsyncSeek + Unpin>(
     reader: R,
     source: impl AsRef<Path>,
     target: impl AsRef<Path>,
@@ -107,7 +107,22 @@ pub async fn archive<R: tokio::io::AsyncBufRead + tokio::io::AsyncSeek + Unpin>(
                 .is_some_and(|ext| ext.eq_ignore_ascii_case("tar"))
         })
     {
-        crate::stream::untar(reader, target).await?;
+        crate::stream::untar_gz(reader, target).await?;
+        return Ok(());
+    }
+
+    // `.tar.zst`
+    if source
+        .as_ref()
+        .extension()
+        .is_some_and(|ext| ext.eq_ignore_ascii_case("zst"))
+        && source.as_ref().file_stem().is_some_and(|stem| {
+            Path::new(stem)
+                .extension()
+                .is_some_and(|ext| ext.eq_ignore_ascii_case("tar"))
+        })
+    {
+        crate::stream::untar_zst(reader, target).await?;
         return Ok(());
     }
 
diff --git a/crates/uv-extract/src/stream.rs b/crates/uv-extract/src/stream.rs
index 3754064a7..e73db2ae4 100644
--- a/crates/uv-extract/src/stream.rs
+++ b/crates/uv-extract/src/stream.rs
@@ -66,10 +66,7 @@ pub async fn unzip<R: tokio::io::AsyncRead + Unpin>(
         use std::fs::Permissions;
         use std::os::unix::fs::PermissionsExt;
 
-        // To avoid lots of small reads to `reader` when parsing the central directory, wrap it in
-        // a buffer.
-        let mut buf = futures::io::BufReader::new(reader);
-        let mut directory = async_zip::base::read::cd::CentralDirectoryReader::new(&mut buf);
+        let mut directory = async_zip::base::read::cd::CentralDirectoryReader::new(&mut reader);
         while let Some(entry) = directory.next().await? {
             if entry.dir()? {
                 continue;
@@ -154,11 +151,30 @@ async fn untar_in<R: tokio::io::AsyncRead + Unpin, P: AsRef<Path>>(
 /// Unzip a `.tar.gz` archive into the target directory, without requiring `Seek`.
 ///
 /// This is useful for unpacking files as they're being downloaded.
-pub async fn untar<R: tokio::io::AsyncBufRead + Unpin>(
+pub async fn untar_gz<R: tokio::io::AsyncRead + Unpin>(
     reader: R,
     target: impl AsRef<Path>,
 ) -> Result<(), Error> {
+    let reader = tokio::io::BufReader::new(reader);
     let decompressed_bytes = async_compression::tokio::bufread::GzipDecoder::new(reader);
+
+    let mut archive = tokio_tar::ArchiveBuilder::new(decompressed_bytes)
+        .set_preserve_mtime(false)
+        .build();
+    untar_in(&mut archive, target.as_ref()).await?;
+    Ok(())
+}
+
+/// Unzip a `.tar.zst` archive into the target directory, without requiring `Seek`.
+///
+/// This is useful for unpacking files as they're being downloaded.
+pub async fn untar_zst<R: tokio::io::AsyncRead + Unpin>(
+    reader: R,
+    target: impl AsRef<Path>,
+) -> Result<(), Error> {
+    let reader = tokio::io::BufReader::new(reader);
+    let decompressed_bytes = async_compression::tokio::bufread::ZstdDecoder::new(reader);
+
     let mut archive = tokio_tar::ArchiveBuilder::new(decompressed_bytes)
         .set_preserve_mtime(false)
         .build();
@@ -166,7 +182,7 @@ pub async fn untar<R: tokio::io::AsyncBufRead + Unpin>(
 }
 
 /// Unzip a `.zip` or `.tar.gz` archive into the target directory, without requiring `Seek`.
-pub async fn archive<R: tokio::io::AsyncBufRead + Unpin>(
+pub async fn archive<R: tokio::io::AsyncRead + Unpin>(
     reader: R,
     source: impl AsRef<Path>,
     target: impl AsRef<Path>,
@@ -192,7 +208,22 @@ pub async fn archive<R: tokio::io::AsyncBufRead + Unpin>(
                 .is_some_and(|ext| ext.eq_ignore_ascii_case("tar"))
         })
     {
-        untar(reader, target).await?;
+        untar_gz(reader, target).await?;
+        return Ok(());
+    }
+
+    // `.tar.zst`
+    if source
+        .as_ref()
+        .extension()
+        .is_some_and(|ext| ext.eq_ignore_ascii_case("zst"))
+        && source.as_ref().file_stem().is_some_and(|stem| {
+            Path::new(stem)
+                .extension()
+                .is_some_and(|ext| ext.eq_ignore_ascii_case("tar"))
+        })
+    {
+        untar_zst(reader, target).await?;
         return Ok(());
     }
 
diff --git a/crates/uv-git/src/git.rs b/crates/uv-git/src/git.rs
index faddeefa1..cd37c9fc2 100644
--- a/crates/uv-git/src/git.rs
+++ b/crates/uv-git/src/git.rs
@@ -25,20 +25,14 @@ const CHECKOUT_READY_LOCK: &str = ".ok";
 /// A reference to commit or commit-ish.
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum GitReference {
-    /// From a branch.
-    #[allow(unused)]
-    Branch(String),
-    /// From a tag.
-    #[allow(unused)]
-    Tag(String),
     /// From a reference that's ambiguously a branch or tag.
     BranchOrTag(String),
+    /// From a reference that's ambiguously a short commit, a branch, or a tag.
+    BranchOrTagOrCommit(String),
+    /// From a named reference, like `refs/pull/493/head`.
+    NamedRef(String),
     /// From a specific revision, using a full 40-character commit hash.
     FullCommit(String),
-    /// From a truncated revision.
-    ShortCommit(String),
-    /// From a named reference, like `refs/pull/493/head`.
-    Ref(String),
     /// The default branch of the repository, the reference named `HEAD`.
     DefaultBranch,
 }
@@ -52,37 +46,28 @@ enum RefspecStrategy {
 }
 
 impl GitReference {
+    /// Creates a [`GitReference`] from a revision string.
     pub(crate) fn from_rev(rev: &str) -> Self {
         if rev.starts_with("refs/") {
-            Self::Ref(rev.to_owned())
+            Self::NamedRef(rev.to_owned())
         } else if looks_like_commit_hash(rev) {
             if rev.len() == 40 {
                 Self::FullCommit(rev.to_owned())
             } else {
-                Self::ShortCommit(rev.to_owned())
+                Self::BranchOrTagOrCommit(rev.to_owned())
             }
         } else {
             Self::BranchOrTag(rev.to_owned())
         }
     }
 
-    pub fn precise(&self) -> Option<&str> {
-        match self {
-            Self::FullCommit(rev) => Some(rev),
-            Self::ShortCommit(rev) => Some(rev),
-            _ => None,
-        }
-    }
-
     /// Converts the [`GitReference`] to a `str`.
     pub fn as_str(&self) -> Option<&str> {
         match self {
-            Self::Branch(rev) => Some(rev),
-            Self::Tag(rev) => Some(rev),
             Self::BranchOrTag(rev) => Some(rev),
             Self::FullCommit(rev) => Some(rev),
-            Self::ShortCommit(rev) => Some(rev),
-            Self::Ref(rev) => Some(rev),
+            Self::BranchOrTagOrCommit(rev) => Some(rev),
+            Self::NamedRef(rev) => Some(rev),
             Self::DefaultBranch => None,
         }
     }
@@ -90,12 +75,10 @@ impl GitReference {
     /// Converts the [`GitReference`] to a `str` that can be used as a revision.
     pub(crate) fn as_rev(&self) -> &str {
         match self {
-            Self::Branch(rev)
-            | Self::Tag(rev)
-            | Self::BranchOrTag(rev)
+            Self::BranchOrTag(rev)
             | Self::FullCommit(rev)
-            | Self::ShortCommit(rev)
-            | Self::Ref(rev) => rev,
+            | Self::BranchOrTagOrCommit(rev)
+            | Self::NamedRef(rev) => rev,
             Self::DefaultBranch => "HEAD",
         }
     }
@@ -103,12 +86,10 @@ impl GitReference {
     /// Returns the kind of this reference.
     pub(crate) fn kind_str(&self) -> &str {
         match self {
-            Self::Branch(_) => "branch",
-            Self::Tag(_) => "tag",
             Self::BranchOrTag(_) => "branch or tag",
             Self::FullCommit(_) => "commit",
-            Self::ShortCommit(_) => "short commit",
-            Self::Ref(_) => "ref",
+            Self::BranchOrTagOrCommit(_) => "branch, tag, or commit",
+            Self::NamedRef(_) => "ref",
             Self::DefaultBranch => "default branch",
         }
     }
@@ -281,37 +262,18 @@ impl GitReference {
     pub(crate) fn resolve(&self, repo: &git2::Repository) -> Result<git2::Oid> {
         let refkind = self.kind_str();
         let id = match self {
-            // Note that we resolve the named tag here in sync with where it's
-            // fetched into via `fetch` below.
-            Self::Tag(s) => (|| -> Result<git2::Oid> {
-                let refname = format!("refs/remotes/origin/tags/{s}");
-                let id = repo.refname_to_id(&refname)?;
-                let obj = repo.find_object(id, None)?;
-                let obj = obj.peel(ObjectType::Commit)?;
-                Ok(obj.id())
-            })()
-            .with_context(|| format!("failed to find {refkind} `{s}`"))?,
-
-            // Resolve the remote name since that's all we're configuring in
-            // `fetch` below.
-            Self::Branch(s) => {
-                let name = format!("origin/{s}");
-                let b = repo
-                    .find_branch(&name, git2::BranchType::Remote)
-                    .with_context(|| format!("failed to find {refkind} `{s}`"))?;
-                b.get()
-                    .target()
-                    .ok_or_else(|| anyhow::format_err!("{refkind} `{s}` did not have a target"))?
-            }
-
             // Attempt to resolve the branch, then the tag.
             Self::BranchOrTag(s) => {
                 let name = format!("origin/{s}");
 
+                // Resolve the remote name since that's all we're configuring in
+                // `fetch` below.
                 repo.find_branch(&name, git2::BranchType::Remote)
                     .ok()
                     .and_then(|b| b.get().target())
                     .or_else(|| {
+                        // Note that we resolve the named tag here in sync with where it's
+                        // fetched into via `fetch` below.
                         let refname = format!("refs/remotes/origin/tags/{s}");
                         let id = repo.refname_to_id(&refname).ok()?;
                         let obj = repo.find_object(id, None).ok()?;
@@ -321,6 +283,35 @@ impl GitReference {
                     .ok_or_else(|| anyhow::format_err!("failed to find {refkind} `{s}`"))?
             }
 
+            // Attempt to resolve the branch, then the tag, then the commit.
+            Self::BranchOrTagOrCommit(s) => {
+                let name = format!("origin/{s}");
+
+                // Resolve the remote name since that's all we're configuring in
+                // `fetch` below.
+                repo.find_branch(&name, git2::BranchType::Remote)
+                    .ok()
+                    .and_then(|b| b.get().target())
+                    .or_else(|| {
+                        // Note that we resolve the named tag here in sync with where it's
+                        // fetched into via `fetch` below.
+                        let refname = format!("refs/remotes/origin/tags/{s}");
+                        let id = repo.refname_to_id(&refname).ok()?;
+                        let obj = repo.find_object(id, None).ok()?;
+                        let obj = obj.peel(ObjectType::Commit).ok()?;
+                        Some(obj.id())
+                    })
+                    .or_else(|| {
+                        // Resolve the commit.
+                        let obj = repo.revparse_single(s).ok()?;
+                        match obj.as_tag() {
+                            Some(tag) => Some(tag.target_id()),
+                            None => Some(obj.id()),
+                        }
+                    })
+                    .ok_or_else(|| anyhow::format_err!("failed to find {refkind} `{s}`"))?
+            }
+
             // We'll be using the HEAD commit
             Self::DefaultBranch => {
                 let head_id = repo.refname_to_id("refs/remotes/origin/HEAD")?;
@@ -328,7 +319,7 @@ impl GitReference {
                 head.peel(ObjectType::Commit)?.id()
             }
 
-            Self::FullCommit(s) | Self::ShortCommit(s) | Self::Ref(s) => {
+            Self::FullCommit(s) | Self::NamedRef(s) => {
                 let obj = repo.revparse_single(s)?;
                 match obj.as_tag() {
                     Some(tag) => tag.target_id(),
@@ -958,14 +949,6 @@ pub(crate) fn fetch(
     match reference {
         // For branches and tags we can fetch simply one reference and copy it
         // locally, no need to fetch other branches/tags.
-        GitReference::Branch(branch) => {
-            refspecs.push(format!("+refs/heads/{branch}:refs/remotes/origin/{branch}"));
-        }
-
-        GitReference::Tag(tag) => {
-            refspecs.push(format!("+refs/tags/{tag}:refs/remotes/origin/tags/{tag}"));
-        }
-
         GitReference::BranchOrTag(branch_or_tag) => {
             refspecs.push(format!(
                 "+refs/heads/{branch_or_tag}:refs/remotes/origin/{branch_or_tag}"
@@ -976,11 +959,31 @@ pub(crate) fn fetch(
             refspec_strategy = RefspecStrategy::First;
         }
 
+        // For ambiguous references, we can fetch the exact commit (if known); otherwise,
+        // we fetch all branches and tags.
+        GitReference::BranchOrTagOrCommit(branch_or_tag_or_commit) => {
+            // The `oid_to_fetch` is the exact commit we want to fetch. But it could be the exact
+            // commit of a branch or tag. We should only fetch it directly if it's the exact commit
+            // of a short commit hash.
+            if let Some(oid_to_fetch) =
+                oid_to_fetch.filter(|oid| is_short_hash_of(branch_or_tag_or_commit, *oid))
+            {
+                refspecs.push(format!("+{oid_to_fetch}:refs/commit/{oid_to_fetch}"));
+            } else {
+                // We don't know what the rev will point to. To handle this
+                // situation we fetch all branches and tags, and then we pray
+                // it's somewhere in there.
+                refspecs.push(String::from("+refs/heads/*:refs/remotes/origin/*"));
+                refspecs.push(String::from("+HEAD:refs/remotes/origin/HEAD"));
+                tags = true;
+            }
+        }
+
         GitReference::DefaultBranch => {
             refspecs.push(String::from("+HEAD:refs/remotes/origin/HEAD"));
         }
 
-        GitReference::Ref(rev) => {
+        GitReference::NamedRef(rev) => {
             refspecs.push(format!("+{rev}:{rev}"));
         }
 
@@ -997,19 +1000,6 @@ pub(crate) fn fetch(
                 refspecs.push(format!("+{rev}:refs/remotes/origin/HEAD"));
             }
         }
-
-        GitReference::ShortCommit(_) => {
-            if let Some(oid_to_fetch) = oid_to_fetch {
-                refspecs.push(format!("+{oid_to_fetch}:refs/commit/{oid_to_fetch}"));
-            } else {
-                // We don't know what the rev will point to. To handle this
-                // situation we fetch all branches and tags, and then we pray
-                // it's somewhere in there.
-                refspecs.push(String::from("+refs/heads/*:refs/remotes/origin/*"));
-                refspecs.push(String::from("+HEAD:refs/remotes/origin/HEAD"));
-                tags = true;
-            }
-        }
     }
 
     debug!("Performing a Git fetch for: {remote_url}");
@@ -1022,8 +1012,12 @@ pub(crate) fn fetch(
                     let mut errors = refspecs
                         .iter()
                         .map_while(|refspec| {
-                            let fetch_result =
-                                fetch_with_cli(repo, remote_url, &[refspec.clone()], tags);
+                            let fetch_result = fetch_with_cli(
+                                repo,
+                                remote_url,
+                                std::slice::from_ref(refspec),
+                                tags,
+                            );
 
                             // Stop after the first success and log failures
                             match fetch_result {
@@ -1335,40 +1329,33 @@ fn github_fast_path(
 
     let local_object = reference.resolve(repo).ok();
     let github_branch_name = match reference {
-        GitReference::Branch(branch) => branch,
-        GitReference::Tag(tag) => tag,
         GitReference::BranchOrTag(branch_or_tag) => branch_or_tag,
         GitReference::DefaultBranch => "HEAD",
-        GitReference::Ref(rev) => rev,
-        GitReference::FullCommit(rev) | GitReference::ShortCommit(rev) => {
-            if looks_like_commit_hash(rev) {
-                // `revparse_single` (used by `resolve`) is the only way to turn
-                // short hash -> long hash, but it also parses other things,
-                // like branch and tag names, which might coincidentally be
-                // valid hex.
-                //
-                // We only return early if `rev` is a prefix of the object found
-                // by `revparse_single`. Don't bother talking to GitHub in that
-                // case, since commit hashes are permanent. If a commit with the
-                // requested hash is already present in the local clone, its
-                // contents must be the same as what is on the server for that
-                // hash.
-                //
-                // If `rev` is not found locally by `revparse_single`, we'll
-                // need GitHub to resolve it and get a hash. If `rev` is found
-                // but is not a short hash of the found object, it's probably a
-                // branch and we also need to get a hash from GitHub, in case
-                // the branch has moved.
-                if let Some(local_object) = local_object {
-                    if is_short_hash_of(rev, local_object) {
-                        return Ok(FastPathRev::UpToDate);
-                    }
+        GitReference::NamedRef(rev) => rev,
+        GitReference::FullCommit(rev) | GitReference::BranchOrTagOrCommit(rev) => {
+            // `revparse_single` (used by `resolve`) is the only way to turn
+            // short hash -> long hash, but it also parses other things,
+            // like branch and tag names, which might coincidentally be
+            // valid hex.
+            //
+            // We only return early if `rev` is a prefix of the object found
+            // by `revparse_single`. Don't bother talking to GitHub in that
+            // case, since commit hashes are permanent. If a commit with the
+            // requested hash is already present in the local clone, its
+            // contents must be the same as what is on the server for that
+            // hash.
+            //
+            // If `rev` is not found locally by `revparse_single`, we'll
+            // need GitHub to resolve it and get a hash. If `rev` is found
+            // but is not a short hash of the found object, it's probably a
+            // branch and we also need to get a hash from GitHub, in case
+            // the branch has moved.
+            if let Some(local_object) = local_object {
+                if is_short_hash_of(rev, local_object) {
+                    return Ok(FastPathRev::UpToDate);
                 }
-                rev
-            } else {
-                debug!("can't use github fast path with `rev = \"{}\"`", rev);
-                return Ok(FastPathRev::Indeterminate);
             }
+            rev
         }
     };
 
diff --git a/crates/uv-git/src/lib.rs b/crates/uv-git/src/lib.rs
index 084571dd2..7198fd071 100644
--- a/crates/uv-git/src/lib.rs
+++ b/crates/uv-git/src/lib.rs
@@ -95,12 +95,10 @@ impl From<GitUrl> for Url {
         } else {
             // Otherwise, add the branch or tag name.
             match git.reference {
-                GitReference::Branch(rev)
-                | GitReference::Tag(rev)
-                | GitReference::BranchOrTag(rev)
-                | GitReference::Ref(rev)
+                GitReference::BranchOrTag(rev)
+                | GitReference::NamedRef(rev)
                 | GitReference::FullCommit(rev)
-                | GitReference::ShortCommit(rev) => {
+                | GitReference::BranchOrTagOrCommit(rev) => {
                     url.set_path(&format!("{}@{}", url.path(), rev));
                 }
                 GitReference::DefaultBranch => {}
diff --git a/crates/uv-git/src/source.rs b/crates/uv-git/src/source.rs
index f1061331a..64483d038 100644
--- a/crates/uv-git/src/source.rs
+++ b/crates/uv-git/src/source.rs
@@ -49,7 +49,7 @@ impl GitSource {
     }
 
     /// Fetch the underlying Git repository at the given revision.
-    #[instrument(skip(self))]
+    #[instrument(skip(self), fields(repository = %self.git.repository, rev = ?self.git.precise))]
     pub fn fetch(self) -> Result<Fetch> {
         // The path to the repo, within the Git database.
         let ident = digest(&RepositoryUrl::new(&self.git.repository));
diff --git a/crates/uv-installer/Cargo.toml b/crates/uv-installer/Cargo.toml
index efb269cc2..789fba48d 100644
--- a/crates/uv-installer/Cargo.toml
+++ b/crates/uv-installer/Cargo.toml
@@ -22,6 +22,7 @@ pypi-types = { workspace = true }
 requirements-txt = { workspace = true }
 uv-cache = { workspace = true }
 uv-client = { workspace = true }
+uv-configuration = { workspace = true }
 uv-distribution = { workspace = true }
 uv-extract = { workspace = true }
 uv-fs = { workspace = true }
@@ -35,6 +36,7 @@ async-channel = { workspace = true }
 fs-err = { workspace = true }
 futures = { workspace = true }
 rayon = { workspace = true }
+rmp-serde = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true }
 tempfile = { workspace = true }
diff --git a/crates/uv-installer/src/downloader.rs b/crates/uv-installer/src/downloader.rs
index 2f8f86091..e83d0bec8 100644
--- a/crates/uv-installer/src/downloader.rs
+++ b/crates/uv-installer/src/downloader.rs
@@ -3,19 +3,19 @@ use std::path::Path;
 use std::sync::Arc;
 
 use futures::{FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt};
-use tempfile::TempDir;
 use tokio::task::JoinError;
 use tracing::instrument;
 use url::Url;
 
 use distribution_types::{
-    BuildableSource, CachedDist, Dist, Identifier, LocalEditable, RemoteSource,
+    BuildableSource, CachedDist, Dist, Hashed, Identifier, LocalEditable, LocalEditables,
+    RemoteSource,
 };
 use platform_tags::Tags;
 use uv_cache::Cache;
 use uv_client::RegistryClient;
-use uv_distribution::{DistributionDatabase, LocalWheel, Unzip};
-use uv_types::{BuildContext, InFlight};
+use uv_distribution::{DistributionDatabase, LocalWheel};
+use uv_types::{BuildContext, HashStrategy, InFlight};
 
 use crate::editable::BuiltEditable;
 
@@ -40,6 +40,7 @@ pub enum Error {
 pub struct Downloader<'a, Context: BuildContext + Send + Sync> {
     tags: &'a Tags,
     cache: &'a Cache,
+    hashes: &'a HashStrategy,
     database: DistributionDatabase<'a, Context>,
     reporter: Option<Arc<dyn Reporter>>,
 }
@@ -48,12 +49,14 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
     pub fn new(
         cache: &'a Cache,
         tags: &'a Tags,
+        hashes: &'a HashStrategy,
         client: &'a RegistryClient,
         build_context: &'a Context,
     ) -> Self {
         Self {
             tags,
             cache,
+            hashes,
             database: DistributionDatabase::new(client, build_context),
             reporter: None,
         }
@@ -66,6 +69,7 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
         Self {
             tags: self.tags,
             cache: self.cache,
+            hashes: self.hashes,
             database: self.database.with_reporter(Facade::from(reporter.clone())),
             reporter: Some(reporter.clone()),
         }
@@ -117,7 +121,7 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
     #[instrument(skip_all)]
     pub async fn build_editables(
         &self,
-        editables: Vec<LocalEditable>,
+        editables: LocalEditables,
         editable_wheel_dir: &Path,
     ) -> Result<Vec<BuiltEditable>, Error> {
         // Build editables in parallel
@@ -133,7 +137,7 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
                     .build_wheel_editable(&editable, editable_wheel_dir)
                     .await
                     .map_err(Error::Editable)?;
-                let cached_dist = self.unzip_wheel(local_wheel).await?;
+                let cached_dist = CachedDist::from(local_wheel);
                 if let Some(task_id) = task_id {
                     if let Some(reporter) = &self.reporter {
                         reporter.on_editable_build_complete(&editable, task_id);
@@ -166,13 +170,28 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
     pub async fn get_wheel(&self, dist: Dist, in_flight: &InFlight) -> Result<CachedDist, Error> {
         let id = dist.distribution_id();
         if in_flight.downloads.register(id.clone()) {
-            let download: LocalWheel = self
+            let policy = self.hashes.get(&dist);
+            let result = self
                 .database
-                .get_or_build_wheel(&dist, self.tags)
+                .get_or_build_wheel(&dist, self.tags, policy)
                 .boxed()
                 .map_err(|err| Error::Fetch(dist.clone(), err))
-                .await?;
-            let result = self.unzip_wheel(download).await;
+                .await
+                .and_then(|wheel: LocalWheel| {
+                    if wheel.satisfies(policy) {
+                        Ok(wheel)
+                    } else {
+                        Err(Error::Fetch(
+                            dist.clone(),
+                            uv_distribution::Error::hash_mismatch(
+                                dist.to_string(),
+                                policy.digests(),
+                                wheel.hashes(),
+                            ),
+                        ))
+                    }
+                })
+                .map(CachedDist::from);
             match result {
                 Ok(cached) => {
                     in_flight.downloads.done(id, Ok(cached.clone()));
@@ -196,37 +215,6 @@ impl<'a, Context: BuildContext + Send + Sync> Downloader<'a, Context> {
             }
         }
     }
-
-    /// Unzip a locally-available wheel into the cache.
-    async fn unzip_wheel(&self, download: LocalWheel) -> Result<CachedDist, Error> {
-        // Just an optimization: Avoid spawning a blocking task if there is no work to be done.
-        if let LocalWheel::Unzipped(download) = download {
-            return Ok(download.into_cached_dist());
-        }
-
-        // Unzip the wheel.
-        let temp_dir = tokio::task::spawn_blocking({
-            let download = download.clone();
-            let cache = self.cache.clone();
-            move || -> Result<TempDir, uv_extract::Error> {
-                // Unzip the wheel into a temporary directory.
-                let temp_dir = tempfile::tempdir_in(cache.root())?;
-                download.unzip(temp_dir.path())?;
-                Ok(temp_dir)
-            }
-        })
-        .await?
-        .map_err(|err| Error::Unzip(download.remote().clone(), err))?;
-
-        // Persist the temporary directory to the directory store.
-        let archive = self
-            .cache
-            .persist(temp_dir.into_path(), download.target())
-            .map_err(Error::CacheWrite)
-            .await?;
-
-        Ok(download.into_cached_dist(archive))
-    }
 }
 
 pub trait Reporter: Send + Sync {
diff --git a/crates/uv-installer/src/plan.rs b/crates/uv-installer/src/plan.rs
index d6ef6668c..21970eafb 100644
--- a/crates/uv-installer/src/plan.rs
+++ b/crates/uv-installer/src/plan.rs
@@ -1,11 +1,11 @@
 use std::collections::hash_map::Entry;
 use std::hash::BuildHasherDefault;
-use std::io;
 
 use anyhow::{bail, Result};
 use rustc_hash::FxHashMap;
 use tracing::{debug, warn};
 
+use distribution_types::Hashed;
 use distribution_types::{
     BuiltDist, CachedDirectUrlDist, CachedDist, Dist, IndexLocations, InstalledDist,
     InstalledMetadata, InstalledVersion, Name, SourceDist,
@@ -13,10 +13,13 @@ use distribution_types::{
 use pep508_rs::{Requirement, VersionOrUrl};
 use platform_tags::Tags;
 use uv_cache::{ArchiveTarget, ArchiveTimestamp, Cache, CacheBucket, WheelCache};
-use uv_distribution::{BuiltWheelIndex, RegistryWheelIndex};
+use uv_configuration::{NoBinary, Reinstall};
+use uv_distribution::{
+    BuiltWheelIndex, HttpArchivePointer, LocalArchivePointer, RegistryWheelIndex,
+};
 use uv_fs::Simplified;
 use uv_interpreter::PythonEnvironment;
-use uv_types::{NoBinary, Reinstall};
+use uv_types::HashStrategy;
 
 use crate::{ResolvedEditable, SitePackages};
 
@@ -53,19 +56,25 @@ impl<'a> Planner<'a> {
     /// plan will respect cache entries created after the current time (as per the [`Refresh`]
     /// policy). Otherwise, entries will be ignored. The downstream distribution database may still
     /// read those entries from the cache after revalidating them.
+    ///
+    /// The install plan will also respect the required hashes, such that it will never return a
+    /// cached distribution that does not match the required hash. Like pip, though, it _will_
+    /// return an _installed_ distribution that does not match the required hash.
     #[allow(clippy::too_many_arguments)]
     pub fn build(
         self,
         mut site_packages: SitePackages<'_>,
         reinstall: &Reinstall,
         no_binary: &NoBinary,
+        hasher: &HashStrategy,
         index_locations: &IndexLocations,
         cache: &Cache,
         venv: &PythonEnvironment,
         tags: &Tags,
     ) -> Result<Plan> {
         // Index all the already-downloaded wheels in the cache.
-        let mut registry_index = RegistryWheelIndex::new(cache, tags, index_locations);
+        let mut registry_index = RegistryWheelIndex::new(cache, tags, index_locations, hasher);
+        let built_index = BuiltWheelIndex::new(cache, tags, hasher);
 
         let mut cached = vec![];
         let mut remote = vec![];
@@ -205,16 +214,9 @@ impl<'a> Planner<'a> {
                     }
                 }
                 Some(VersionOrUrl::VersionSpecifier(specifier)) => {
-                    if let Some(distribution) =
-                        registry_index
-                            .get(&requirement.name)
-                            .find_map(|(version, distribution)| {
-                                if specifier.contains(version) {
-                                    Some(distribution)
-                                } else {
-                                    None
-                                }
-                            })
+                    if let Some((_version, distribution)) = registry_index
+                        .get(&requirement.name)
+                        .find(|(version, _)| specifier.contains(version))
                     {
                         debug!("Requirement already cached: {distribution}");
                         cached.push(CachedDist::Registry(distribution.clone()));
@@ -251,24 +253,23 @@ impl<'a> Planner<'a> {
                                     CacheBucket::Wheels,
                                     WheelCache::Url(&wheel.url).wheel_dir(wheel.name().as_ref()),
                                 )
-                                .entry(wheel.filename.stem());
+                                .entry(format!("{}.http", wheel.filename.stem()));
 
-                            match cache_entry.path().canonicalize() {
-                                Ok(archive) => {
+                            // Read the HTTP pointer.
+                            if let Some(pointer) = HttpArchivePointer::read_from(&cache_entry)? {
+                                let archive = pointer.into_archive();
+                                if archive.satisfies(hasher.get(&wheel)) {
                                     let cached_dist = CachedDirectUrlDist::from_url(
                                         wheel.filename,
                                         wheel.url,
-                                        archive,
+                                        archive.hashes,
+                                        cache.archive(&archive.id),
                                     );
 
                                     debug!("URL wheel requirement already cached: {cached_dist}");
                                     cached.push(CachedDist::Url(cached_dist));
                                     continue;
                                 }
-                                Err(err) if err.kind() == io::ErrorKind::NotFound => {
-                                    // The cache entry doesn't exist, so it's not fresh.
-                                }
-                                Err(err) => return Err(err.into()),
                             }
                         }
                         Dist::Built(BuiltDist::Path(wheel)) => {
@@ -293,37 +294,33 @@ impl<'a> Planner<'a> {
                                     CacheBucket::Wheels,
                                     WheelCache::Url(&wheel.url).wheel_dir(wheel.name().as_ref()),
                                 )
-                                .entry(wheel.filename.stem());
+                                .entry(format!("{}.rev", wheel.filename.stem()));
 
-                            match cache_entry.path().canonicalize() {
-                                Ok(archive) => {
-                                    if ArchiveTimestamp::up_to_date_with(
-                                        &wheel.path,
-                                        ArchiveTarget::Cache(&archive),
-                                    )? {
+                            if let Some(pointer) = LocalArchivePointer::read_from(&cache_entry)? {
+                                let timestamp = ArchiveTimestamp::from_file(&wheel.path)?;
+                                if pointer.is_up_to_date(timestamp) {
+                                    let archive = pointer.into_archive();
+                                    if archive.satisfies(hasher.get(&wheel)) {
                                         let cached_dist = CachedDirectUrlDist::from_url(
                                             wheel.filename,
                                             wheel.url,
-                                            archive,
+                                            archive.hashes,
+                                            cache.archive(&archive.id),
                                         );
 
                                         debug!(
-                                            "URL wheel requirement already cached: {cached_dist}"
+                                            "Path wheel requirement already cached: {cached_dist}"
                                         );
                                         cached.push(CachedDist::Url(cached_dist));
                                         continue;
                                     }
                                 }
-                                Err(err) if err.kind() == io::ErrorKind::NotFound => {
-                                    // The cache entry doesn't exist, so it's not fresh.
-                                }
-                                Err(err) => return Err(err.into()),
                             }
                         }
                         Dist::Source(SourceDist::DirectUrl(sdist)) => {
                             // Find the most-compatible wheel from the cache, since we don't know
                             // the filename in advance.
-                            if let Some(wheel) = BuiltWheelIndex::url(&sdist, cache, tags)? {
+                            if let Some(wheel) = built_index.url(&sdist)? {
                                 let cached_dist = wheel.into_url_dist(url.clone());
                                 debug!("URL source requirement already cached: {cached_dist}");
                                 cached.push(CachedDist::Url(cached_dist));
@@ -333,7 +330,7 @@ impl<'a> Planner<'a> {
                         Dist::Source(SourceDist::Path(sdist)) => {
                             // Find the most-compatible wheel from the cache, since we don't know
                             // the filename in advance.
-                            if let Some(wheel) = BuiltWheelIndex::path(&sdist, cache, tags)? {
+                            if let Some(wheel) = built_index.path(&sdist)? {
                                 let cached_dist = wheel.into_url_dist(url.clone());
                                 debug!("Path source requirement already cached: {cached_dist}");
                                 cached.push(CachedDist::Url(cached_dist));
@@ -343,7 +340,7 @@ impl<'a> Planner<'a> {
                         Dist::Source(SourceDist::Git(sdist)) => {
                             // Find the most-compatible wheel from the cache, since we don't know
                             // the filename in advance.
-                            if let Some(wheel) = BuiltWheelIndex::git(&sdist, cache, tags) {
+                            if let Some(wheel) = built_index.git(&sdist) {
                                 let cached_dist = wheel.into_url_dist(url.clone());
                                 debug!("Git source requirement already cached: {cached_dist}");
                                 cached.push(CachedDist::Url(cached_dist));
diff --git a/crates/uv-installer/src/site_packages.rs b/crates/uv-installer/src/site_packages.rs
index 26514e5d3..3db4424ee 100644
--- a/crates/uv-installer/src/site_packages.rs
+++ b/crates/uv-installer/src/site_packages.rs
@@ -10,7 +10,7 @@ use url::Url;
 use distribution_types::{InstalledDist, InstalledMetadata, InstalledVersion, Name};
 use pep440_rs::{Version, VersionSpecifiers};
 use pep508_rs::{Requirement, RequirementsTxtRequirement, VerbatimUrl};
-use requirements_txt::EditableRequirement;
+use requirements_txt::{EditableRequirement, RequirementEntry};
 use uv_cache::{ArchiveTarget, ArchiveTimestamp};
 use uv_interpreter::PythonEnvironment;
 use uv_normalize::PackageName;
@@ -299,19 +299,22 @@ impl<'a> SitePackages<'a> {
     /// Returns `true` if the installed packages satisfy the given requirements.
     pub fn satisfies(
         &self,
-        requirements: &[RequirementsTxtRequirement],
+        requirements: &[RequirementEntry],
         editables: &[EditableRequirement],
         constraints: &[Requirement],
     ) -> Result<bool> {
-        let mut stack = Vec::<RequirementsTxtRequirement>::with_capacity(requirements.len());
+        let mut stack = Vec::<RequirementEntry>::with_capacity(requirements.len());
         let mut seen =
             FxHashSet::with_capacity_and_hasher(requirements.len(), BuildHasherDefault::default());
 
         // Add the direct requirements to the queue.
-        for dependency in requirements {
-            if dependency.evaluate_markers(self.venv.interpreter().markers(), &[]) {
-                if seen.insert(dependency.clone()) {
-                    stack.push(dependency.clone());
+        for entry in requirements {
+            if entry
+                .requirement
+                .evaluate_markers(self.venv.interpreter().markers(), &[])
+            {
+                if seen.insert(entry.clone()) {
+                    stack.push(entry.clone());
                 }
             }
         }
@@ -349,7 +352,10 @@ impl<'a> SitePackages<'a> {
                             self.venv.interpreter().markers(),
                             &requirement.extras,
                         ) {
-                            let dependency = RequirementsTxtRequirement::from(dependency);
+                            let dependency = RequirementEntry {
+                                requirement: RequirementsTxtRequirement::Pep508(dependency),
+                                hashes: vec![],
+                            };
                             if seen.insert(dependency.clone()) {
                                 stack.push(dependency);
                             }
@@ -364,8 +370,8 @@ impl<'a> SitePackages<'a> {
         }
 
         // Verify that all non-editable requirements are met.
-        while let Some(requirement) = stack.pop() {
-            let installed = match &requirement {
+        while let Some(entry) = stack.pop() {
+            let installed = match &entry.requirement {
                 RequirementsTxtRequirement::Pep508(requirement) => {
                     self.get_packages(&requirement.name)
                 }
@@ -380,7 +386,7 @@ impl<'a> SitePackages<'a> {
                 }
                 [distribution] => {
                     // Validate that the installed version matches the requirement.
-                    match requirement.version_or_url() {
+                    match entry.requirement.version_or_url() {
                         // Accept any installed version.
                         None => {}
 
@@ -466,9 +472,12 @@ impl<'a> SitePackages<'a> {
                     for dependency in metadata.requires_dist {
                         if dependency.evaluate_markers(
                             self.venv.interpreter().markers(),
-                            requirement.extras(),
+                            entry.requirement.extras(),
                         ) {
-                            let dependency = RequirementsTxtRequirement::from(dependency);
+                            let dependency = RequirementEntry {
+                                requirement: RequirementsTxtRequirement::Pep508(dependency),
+                                hashes: vec![],
+                            };
                             if seen.insert(dependency.clone()) {
                                 stack.push(dependency);
                             }
diff --git a/crates/uv-interpreter/Cargo.toml b/crates/uv-interpreter/Cargo.toml
index d8ae8fb75..eef17ce3b 100644
--- a/crates/uv-interpreter/Cargo.toml
+++ b/crates/uv-interpreter/Cargo.toml
@@ -21,6 +21,7 @@ platform-tags = { workspace = true }
 pypi-types = { workspace = true }
 uv-cache = { workspace = true }
 uv-fs = { workspace = true }
+uv-toolchain = { workspace = true }
 
 configparser = { workspace = true }
 fs-err = { workspace = true, features = ["tokio"] }
diff --git a/crates/uv-interpreter/src/find_python.rs b/crates/uv-interpreter/src/find_python.rs
index b06472d21..2fc45bdec 100644
--- a/crates/uv-interpreter/src/find_python.rs
+++ b/crates/uv-interpreter/src/find_python.rs
@@ -7,10 +7,11 @@ use tracing::{debug, instrument};
 
 use uv_cache::Cache;
 use uv_fs::normalize_path;
+use uv_toolchain::PythonVersion;
 
 use crate::interpreter::InterpreterInfoError;
 use crate::python_environment::{detect_python_executable, detect_virtual_env};
-use crate::{Error, Interpreter, PythonVersion};
+use crate::{Error, Interpreter};
 
 /// Find a Python of a specific version, a binary with a name or a path to a binary.
 ///
@@ -464,7 +465,7 @@ fn find_version(
     let version_matches = |interpreter: &Interpreter| -> bool {
         if let Some(python_version) = python_version {
             // If a patch version was provided, check for an exact match
-            python_version.is_satisfied_by(interpreter)
+            interpreter.satisfies(python_version)
         } else {
             // The version always matches if one was not provided
             true
diff --git a/crates/uv-interpreter/src/interpreter.rs b/crates/uv-interpreter/src/interpreter.rs
index a5ff8e01a..ce14845f9 100644
--- a/crates/uv-interpreter/src/interpreter.rs
+++ b/crates/uv-interpreter/src/interpreter.rs
@@ -16,6 +16,7 @@ use platform_tags::{Tags, TagsError};
 use pypi_types::Scheme;
 use uv_cache::{Cache, CacheBucket, CachedByTimestamp, Freshness, Timestamp};
 use uv_fs::{write_atomic_sync, PythonExt, Simplified};
+use uv_toolchain::PythonVersion;
 
 use crate::Error;
 use crate::Virtualenv;
@@ -314,6 +315,18 @@ impl Interpreter {
             },
         }
     }
+
+    /// Check if the interpreter matches the given Python version.
+    ///
+    /// If a patch version is present, we will require an exact match.
+    /// Otherwise, just the major and minor version numbers need to match.
+    pub fn satisfies(&self, version: &PythonVersion) -> bool {
+        if version.patch().is_some() {
+            version.version() == self.python_version()
+        } else {
+            (version.major(), version.minor()) == self.python_tuple()
+        }
+    }
 }
 
 /// The `EXTERNALLY-MANAGED` file in a Python installation.
diff --git a/crates/uv-interpreter/src/lib.rs b/crates/uv-interpreter/src/lib.rs
index 535888a78..1286ff436 100644
--- a/crates/uv-interpreter/src/lib.rs
+++ b/crates/uv-interpreter/src/lib.rs
@@ -19,14 +19,12 @@ pub use crate::find_python::{find_best_python, find_default_python, find_request
 pub use crate::interpreter::Interpreter;
 use crate::interpreter::InterpreterInfoError;
 pub use crate::python_environment::PythonEnvironment;
-pub use crate::python_version::PythonVersion;
 pub use crate::virtualenv::Virtualenv;
 
 mod cfg;
 mod find_python;
 mod interpreter;
 mod python_environment;
-mod python_version;
 mod virtualenv;
 
 #[derive(Debug, Error)]
diff --git a/crates/uv-requirements/Cargo.toml b/crates/uv-requirements/Cargo.toml
index c2befe770..658a89479 100644
--- a/crates/uv-requirements/Cargo.toml
+++ b/crates/uv-requirements/Cargo.toml
@@ -23,6 +23,7 @@ uv-normalize = { workspace = true }
 uv-resolver = { workspace = true, features = ["clap"] }
 uv-types = { workspace = true }
 uv-warnings = { workspace = true }
+uv-configuration = { workspace = true }
 
 anyhow = { workspace = true }
 configparser = { workspace = true }
diff --git a/crates/uv-requirements/src/confirm.rs b/crates/uv-requirements/src/confirm.rs
index 3b111d331..7eb7d8b59 100644
--- a/crates/uv-requirements/src/confirm.rs
+++ b/crates/uv-requirements/src/confirm.rs
@@ -6,7 +6,8 @@ use console::{style, Key, Term};
 /// This is a slimmed-down version of `dialoguer::Confirm`, with the post-confirmation report
 /// enabled.
 pub(crate) fn confirm(message: &str, term: &Term, default: bool) -> Result<bool> {
-    ctrlc::set_handler(move || {
+    // Set the Ctrl-C handler to exit the process.
+    let result = ctrlc::set_handler(move || {
         let term = Term::stderr();
         term.show_cursor().ok();
         term.flush().ok();
@@ -17,7 +18,16 @@ pub(crate) fn confirm(message: &str, term: &Term, default: bool) -> Result<bool>
         } else {
             130
         });
-    })?;
+    });
+
+    match result {
+        Ok(()) => {}
+        Err(ctrlc::Error::MultipleHandlers) => {
+            // If multiple handlers were set, we assume that the existing handler is our
+            // confirmation handler, and continue.
+        }
+        Err(e) => return Err(e.into()),
+    }
 
     let prompt = format!(
         "{} {} {} {} {}",
diff --git a/crates/uv-requirements/src/lookahead.rs b/crates/uv-requirements/src/lookahead.rs
index 775603968..496b6506a 100644
--- a/crates/uv-requirements/src/lookahead.rs
+++ b/crates/uv-requirements/src/lookahead.rs
@@ -1,7 +1,6 @@
 use std::collections::VecDeque;
 
 use anyhow::{Context, Result};
-
 use futures::stream::FuturesUnordered;
 use futures::StreamExt;
 use rustc_hash::FxHashSet;
@@ -10,9 +9,10 @@ use distribution_types::{Dist, DistributionMetadata, LocalEditable};
 use pep508_rs::{MarkerEnvironment, Requirement, VersionOrUrl};
 use pypi_types::Metadata23;
 use uv_client::RegistryClient;
+use uv_configuration::{Constraints, Overrides};
 use uv_distribution::{DistributionDatabase, Reporter};
-use uv_resolver::InMemoryIndex;
-use uv_types::{BuildContext, Constraints, Overrides, RequestedRequirements};
+use uv_resolver::{InMemoryIndex, MetadataResponse};
+use uv_types::{BuildContext, HashStrategy, RequestedRequirements};
 
 /// A resolver for resolving lookahead requirements from direct URLs.
 ///
@@ -39,6 +39,8 @@ pub struct LookaheadResolver<'a, Context: BuildContext + Send + Sync> {
     overrides: &'a Overrides,
     /// The editable requirements for the project.
     editables: &'a [(LocalEditable, Metadata23)],
+    /// The required hashes for the project.
+    hasher: &'a HashStrategy,
     /// The in-memory index for resolving dependencies.
     index: &'a InMemoryIndex,
     /// The database for fetching and building distributions.
@@ -47,11 +49,13 @@ pub struct LookaheadResolver<'a, Context: BuildContext + Send + Sync> {
 
 impl<'a, Context: BuildContext + Send + Sync> LookaheadResolver<'a, Context> {
     /// Instantiate a new [`LookaheadResolver`] for a given set of requirements.
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         requirements: &'a [Requirement],
         constraints: &'a Constraints,
         overrides: &'a Overrides,
         editables: &'a [(LocalEditable, Metadata23)],
+        hasher: &'a HashStrategy,
         context: &'a Context,
         client: &'a RegistryClient,
         index: &'a InMemoryIndex,
@@ -61,6 +65,7 @@ impl<'a, Context: BuildContext + Send + Sync> LookaheadResolver<'a, Context> {
             constraints,
             overrides,
             editables,
+            hasher,
             index,
             database: DistributionDatabase::new(client, context),
         }
@@ -133,25 +138,37 @@ impl<'a, Context: BuildContext + Send + Sync> LookaheadResolver<'a, Context> {
 
         // Fetch the metadata for the distribution.
         let requires_dist = {
-            let id = dist.package_id();
-            if let Some(metadata) = self.index.get_metadata(&id) {
+            let id = dist.version_id();
+            if let Some(archive) = self
+                .index
+                .get_metadata(&id)
+                .as_deref()
+                .and_then(|response| {
+                    if let MetadataResponse::Found(archive, ..) = response {
+                        Some(archive)
+                    } else {
+                        None
+                    }
+                })
+            {
                 // If the metadata is already in the index, return it.
-                metadata.requires_dist.clone()
+                archive.metadata.requires_dist.clone()
             } else {
                 // Run the PEP 517 build process to extract metadata from the source distribution.
-                let metadata = self
+                let archive = self
                     .database
-                    .get_or_build_wheel_metadata(&dist)
+                    .get_or_build_wheel_metadata(&dist, self.hasher.get(&dist))
                     .await
                     .with_context(|| match &dist {
                         Dist::Built(built) => format!("Failed to download: {built}"),
                         Dist::Source(source) => format!("Failed to download and build: {source}"),
                     })?;
 
-                let requires_dist = metadata.requires_dist.clone();
+                let requires_dist = archive.metadata.requires_dist.clone();
 
                 // Insert the metadata into the index.
-                self.index.insert_metadata(id, metadata);
+                self.index
+                    .insert_metadata(id, MetadataResponse::Found(archive));
 
                 requires_dist
             }
diff --git a/crates/uv-requirements/src/source_tree.rs b/crates/uv-requirements/src/source_tree.rs
index 580b44979..920c42993 100644
--- a/crates/uv-requirements/src/source_tree.rs
+++ b/crates/uv-requirements/src/source_tree.rs
@@ -1,30 +1,31 @@
 use std::borrow::Cow;
-use std::ops::Deref;
 use std::path::{Path, PathBuf};
 
 use anyhow::{Context, Result};
 use futures::{StreamExt, TryStreamExt};
 use url::Url;
 
-use distribution_types::{BuildableSource, PackageId, PathSourceUrl, SourceUrl};
+use distribution_types::{BuildableSource, HashPolicy, PathSourceUrl, SourceUrl, VersionId};
 use pep508_rs::Requirement;
 use uv_client::RegistryClient;
 use uv_distribution::{DistributionDatabase, Reporter};
 use uv_fs::Simplified;
-use uv_resolver::InMemoryIndex;
-use uv_types::BuildContext;
+use uv_resolver::{InMemoryIndex, MetadataResponse};
+use uv_types::{BuildContext, HashStrategy};
 
 use crate::ExtrasSpecification;
 
 /// A resolver for requirements specified via source trees.
 ///
-/// Used, e.g., to determine the the input requirements when a user specifies a `pyproject.toml`
+/// Used, e.g., to determine the input requirements when a user specifies a `pyproject.toml`
 /// file, which may require running PEP 517 build hooks to extract metadata.
 pub struct SourceTreeResolver<'a, Context: BuildContext + Send + Sync> {
     /// The requirements for the project.
     source_trees: Vec<PathBuf>,
     /// The extras to include when resolving requirements.
     extras: &'a ExtrasSpecification<'a>,
+    /// The hash policy to enforce.
+    hasher: &'a HashStrategy,
     /// The in-memory index for resolving dependencies.
     index: &'a InMemoryIndex,
     /// The database for fetching and building distributions.
@@ -36,6 +37,7 @@ impl<'a, Context: BuildContext + Send + Sync> SourceTreeResolver<'a, Context> {
     pub fn new(
         source_trees: Vec<PathBuf>,
         extras: &'a ExtrasSpecification<'a>,
+        hasher: &'a HashStrategy,
         context: &'a Context,
         client: &'a RegistryClient,
         index: &'a InMemoryIndex,
@@ -43,6 +45,7 @@ impl<'a, Context: BuildContext + Send + Sync> SourceTreeResolver<'a, Context> {
         Self {
             source_trees,
             extras,
+            hasher,
             index,
             database: DistributionDatabase::new(client, context),
         }
@@ -84,21 +87,46 @@ impl<'a, Context: BuildContext + Send + Sync> SourceTreeResolver<'a, Context> {
             path: Cow::Owned(path),
         });
 
+        // Determine the hash policy. Since we don't have a package name, we perform a
+        // manual match.
+        let hashes = match self.hasher {
+            HashStrategy::None => HashPolicy::None,
+            HashStrategy::Generate => HashPolicy::Generate,
+            HashStrategy::Validate { .. } => {
+                return Err(anyhow::anyhow!(
+                    "Hash-checking is not supported for local directories: {}",
+                    source_tree.user_display()
+                ));
+            }
+        };
+
         // Fetch the metadata for the distribution.
         let metadata = {
-            let id = PackageId::from_url(source.url());
-            if let Some(metadata) = self.index.get_metadata(&id) {
+            let id = VersionId::from_url(source.url());
+            if let Some(archive) = self
+                .index
+                .get_metadata(&id)
+                .as_deref()
+                .and_then(|response| {
+                    if let MetadataResponse::Found(archive) = response {
+                        Some(archive)
+                    } else {
+                        None
+                    }
+                })
+            {
                 // If the metadata is already in the index, return it.
-                metadata.deref().clone()
+                archive.metadata.clone()
             } else {
                 // Run the PEP 517 build process to extract metadata from the source distribution.
                 let source = BuildableSource::Url(source);
-                let metadata = self.database.build_wheel_metadata(&source).await?;
+                let archive = self.database.build_wheel_metadata(&source, hashes).await?;
 
                 // Insert the metadata into the index.
-                self.index.insert_metadata(id, metadata.clone());
+                self.index
+                    .insert_metadata(id, MetadataResponse::Found(archive.clone()));
 
-                metadata
+                archive.metadata
             }
         };
 
diff --git a/crates/uv-requirements/src/specification.rs b/crates/uv-requirements/src/specification.rs
index eb73de073..63e1f64ed 100644
--- a/crates/uv-requirements/src/specification.rs
+++ b/crates/uv-requirements/src/specification.rs
@@ -7,11 +7,11 @@ use tracing::{instrument, Level};
 use cache_key::CanonicalUrl;
 use distribution_types::{FlatIndexLocation, IndexUrl};
 use pep508_rs::{Requirement, RequirementsTxtRequirement};
-use requirements_txt::{EditableRequirement, FindLink, RequirementsTxt};
+use requirements_txt::{EditableRequirement, FindLink, RequirementEntry, RequirementsTxt};
 use uv_client::BaseClientBuilder;
+use uv_configuration::{NoBinary, NoBuild};
 use uv_fs::Simplified;
 use uv_normalize::{ExtraName, PackageName};
-use uv_types::{NoBinary, NoBuild};
 
 use crate::pyproject::{Pep621Metadata, PyProjectToml};
 use crate::{ExtrasSpecification, RequirementsSource};
@@ -21,11 +21,11 @@ pub struct RequirementsSpecification {
     /// The name of the project specifying requirements.
     pub project: Option<PackageName>,
     /// The requirements for the project.
-    pub requirements: Vec<RequirementsTxtRequirement>,
+    pub requirements: Vec<RequirementEntry>,
     /// The constraints for the project.
     pub constraints: Vec<Requirement>,
     /// The overrides for the project.
-    pub overrides: Vec<Requirement>,
+    pub overrides: Vec<RequirementEntry>,
     /// Package to install as editable installs
     pub editables: Vec<EditableRequirement>,
     /// The source trees from which to extract requirements.
@@ -60,7 +60,10 @@ impl RequirementsSpecification {
                     .with_context(|| format!("Failed to parse `{name}`"))?;
                 Self {
                     project: None,
-                    requirements: vec![requirement],
+                    requirements: vec![RequirementEntry {
+                        requirement,
+                        hashes: vec![],
+                    }],
                     constraints: vec![],
                     overrides: vec![],
                     editables: vec![],
@@ -98,11 +101,7 @@ impl RequirementsSpecification {
                     RequirementsTxt::parse(path, std::env::current_dir()?, client_builder).await?;
                 Self {
                     project: None,
-                    requirements: requirements_txt
-                        .requirements
-                        .into_iter()
-                        .map(|entry| entry.requirement)
-                        .collect(),
+                    requirements: requirements_txt.requirements,
                     constraints: requirements_txt.constraints,
                     overrides: vec![],
                     editables: requirements_txt.editables,
@@ -151,7 +150,10 @@ impl RequirementsSpecification {
                         requirements: project
                             .requirements
                             .into_iter()
-                            .map(RequirementsTxtRequirement::Pep508)
+                            .map(|requirement| RequirementEntry {
+                                requirement: RequirementsTxtRequirement::Pep508(requirement),
+                                hashes: vec![],
+                            })
                             .collect(),
                         constraints: vec![],
                         overrides: vec![],
@@ -261,11 +263,12 @@ impl RequirementsSpecification {
             spec.no_build.extend(source.no_build);
         }
 
-        // Read all constraints, treating _everything_ as a constraint.
+        // Read all constraints, treating both requirements _and_ constraints as constraints.
+        // Overrides are ignored, as are the hashes, as they are not relevant for constraints.
         for source in constraints {
             let source = Self::from_source(source, extras, client_builder).await?;
-            for requirement in source.requirements {
-                match requirement {
+            for entry in source.requirements {
+                match entry.requirement {
                     RequirementsTxtRequirement::Pep508(requirement) => {
                         spec.constraints.push(requirement);
                     }
@@ -277,7 +280,6 @@ impl RequirementsSpecification {
                 }
             }
             spec.constraints.extend(source.constraints);
-            spec.constraints.extend(source.overrides);
 
             if let Some(index_url) = source.index_url {
                 if let Some(existing) = spec.index_url {
@@ -296,22 +298,11 @@ impl RequirementsSpecification {
             spec.no_build.extend(source.no_build);
         }
 
-        // Read all overrides, treating both requirements _and_ constraints as overrides.
+        // Read all overrides, treating both requirements _and_ overrides as overrides.
+        // Constraints are ignored.
         for source in overrides {
             let source = Self::from_source(source, extras, client_builder).await?;
-            for requirement in source.requirements {
-                match requirement {
-                    RequirementsTxtRequirement::Pep508(requirement) => {
-                        spec.overrides.push(requirement);
-                    }
-                    RequirementsTxtRequirement::Unnamed(requirement) => {
-                        return Err(anyhow::anyhow!(
-                            "Unnamed requirements are not allowed as overrides (found: `{requirement}`)"
-                        ));
-                    }
-                }
-            }
-            spec.overrides.extend(source.constraints);
+            spec.overrides.extend(source.requirements);
             spec.overrides.extend(source.overrides);
 
             if let Some(index_url) = source.index_url {
diff --git a/crates/uv-requirements/src/unnamed.rs b/crates/uv-requirements/src/unnamed.rs
index 905594686..d245b8166 100644
--- a/crates/uv-requirements/src/unnamed.rs
+++ b/crates/uv-requirements/src/unnamed.rs
@@ -10,23 +10,26 @@ use tracing::debug;
 
 use distribution_filename::{SourceDistFilename, WheelFilename};
 use distribution_types::{
-    BuildableSource, DirectSourceUrl, GitSourceUrl, PackageId, PathSourceUrl, RemoteSource,
-    SourceUrl,
+    BuildableSource, DirectSourceUrl, GitSourceUrl, PathSourceUrl, RemoteSource, SourceUrl,
+    VersionId,
 };
 use pep508_rs::{
     Requirement, RequirementsTxtRequirement, Scheme, UnnamedRequirement, VersionOrUrl,
 };
 use pypi_types::Metadata10;
+use requirements_txt::RequirementEntry;
 use uv_client::RegistryClient;
 use uv_distribution::{DistributionDatabase, Reporter};
 use uv_normalize::PackageName;
-use uv_resolver::InMemoryIndex;
-use uv_types::BuildContext;
+use uv_resolver::{InMemoryIndex, MetadataResponse};
+use uv_types::{BuildContext, HashStrategy};
 
 /// Like [`RequirementsSpecification`], but with concrete names for all requirements.
 pub struct NamedRequirementsResolver<'a, Context: BuildContext + Send + Sync> {
     /// The requirements for the project.
-    requirements: Vec<RequirementsTxtRequirement>,
+    requirements: Vec<RequirementEntry>,
+    /// Whether to check hashes for distributions.
+    hasher: &'a HashStrategy,
     /// The in-memory index for resolving dependencies.
     index: &'a InMemoryIndex,
     /// The database for fetching and building distributions.
@@ -36,13 +39,15 @@ pub struct NamedRequirementsResolver<'a, Context: BuildContext + Send + Sync> {
 impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Context> {
     /// Instantiate a new [`NamedRequirementsResolver`] for a given set of requirements.
     pub fn new(
-        requirements: Vec<RequirementsTxtRequirement>,
+        requirements: Vec<RequirementEntry>,
+        hasher: &'a HashStrategy,
         context: &'a Context,
         client: &'a RegistryClient,
         index: &'a InMemoryIndex,
     ) -> Self {
         Self {
             requirements,
+            hasher,
             index,
             database: DistributionDatabase::new(client, context),
         }
@@ -61,15 +66,16 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
     pub async fn resolve(self) -> Result<Vec<Requirement>> {
         let Self {
             requirements,
+            hasher,
             index,
             database,
         } = self;
         futures::stream::iter(requirements)
-            .map(|requirement| async {
-                match requirement {
+            .map(|entry| async {
+                match entry.requirement {
                     RequirementsTxtRequirement::Pep508(requirement) => Ok(requirement),
                     RequirementsTxtRequirement::Unnamed(requirement) => {
-                        Self::resolve_requirement(requirement, index, &database).await
+                        Self::resolve_requirement(requirement, hasher, index, &database).await
                     }
                 }
             })
@@ -81,6 +87,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
     /// Infer the package name for a given "unnamed" requirement.
     async fn resolve_requirement(
         requirement: UnnamedRequirement,
+        hasher: &HashStrategy,
         index: &InMemoryIndex,
         database: &DistributionDatabase<'a, Context>,
     ) -> Result<Requirement> {
@@ -235,19 +242,26 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
 
         // Fetch the metadata for the distribution.
         let name = {
-            let id = PackageId::from_url(source.url());
-            if let Some(metadata) = index.get_metadata(&id) {
+            let id = VersionId::from_url(source.url());
+            if let Some(archive) = index.get_metadata(&id).as_deref().and_then(|response| {
+                if let MetadataResponse::Found(archive) = response {
+                    Some(archive)
+                } else {
+                    None
+                }
+            }) {
                 // If the metadata is already in the index, return it.
-                metadata.name.clone()
+                archive.metadata.name.clone()
             } else {
                 // Run the PEP 517 build process to extract metadata from the source distribution.
+                let hashes = hasher.get_url(source.url());
                 let source = BuildableSource::Url(source);
-                let metadata = database.build_wheel_metadata(&source).await?;
+                let archive = database.build_wheel_metadata(&source, hashes).await?;
 
-                let name = metadata.name.clone();
+                let name = archive.metadata.name.clone();
 
                 // Insert the metadata into the index.
-                index.insert_metadata(id, metadata);
+                index.insert_metadata(id, MetadataResponse::Found(archive));
 
                 name
             }
diff --git a/crates/uv-requirements/src/upgrade.rs b/crates/uv-requirements/src/upgrade.rs
index 49a1cc1e3..8dc92c5c2 100644
--- a/crates/uv-requirements/src/upgrade.rs
+++ b/crates/uv-requirements/src/upgrade.rs
@@ -4,8 +4,8 @@ use anyhow::Result;
 
 use requirements_txt::RequirementsTxt;
 use uv_client::{BaseClientBuilder, Connectivity};
+use uv_configuration::Upgrade;
 use uv_resolver::{Preference, PreferenceError};
-use uv_types::Upgrade;
 
 /// Load the preferred requirements from an existing lockfile, applying the upgrade strategy.
 pub async fn read_lockfile(
@@ -30,7 +30,6 @@ pub async fn read_lockfile(
     let preferences = requirements_txt
         .requirements
         .into_iter()
-        .filter(|entry| !entry.editable)
         .map(Preference::from_entry)
         .collect::<Result<Vec<_>, PreferenceError>>()?;
 
diff --git a/crates/uv-resolver/Cargo.toml b/crates/uv-resolver/Cargo.toml
index de2d97827..55269d8c6 100644
--- a/crates/uv-resolver/Cargo.toml
+++ b/crates/uv-resolver/Cargo.toml
@@ -16,6 +16,7 @@ workspace = true
 cache-key = { workspace = true }
 distribution-filename = { workspace = true, features = ["serde"] }
 distribution-types = { workspace = true }
+install-wheel-rs = { workspace = true }
 once-map = { workspace = true }
 pep440_rs = { workspace = true }
 pep508_rs = { workspace = true }
@@ -29,6 +30,7 @@ uv-interpreter = { workspace = true }
 uv-normalize = { workspace = true }
 uv-types = { workspace = true }
 uv-warnings = { workspace = true }
+uv-configuration = { workspace = true }
 
 anstream = { workspace = true }
 anyhow = { workspace = true }
@@ -46,6 +48,7 @@ petgraph = { workspace = true }
 pubgrub = { workspace = true }
 rkyv = { workspace = true }
 rustc-hash = { workspace = true }
+textwrap = { workspace = true }
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["macros"] }
 tokio-stream = { workspace = true }
diff --git a/crates/uv-resolver/src/candidate_selector.rs b/crates/uv-resolver/src/candidate_selector.rs
index eff292bd9..31a6783e9 100644
--- a/crates/uv-resolver/src/candidate_selector.rs
+++ b/crates/uv-resolver/src/candidate_selector.rs
@@ -70,8 +70,32 @@ impl CandidateSelector {
     pub(crate) fn select<'a, InstalledPackages: InstalledPackagesProvider>(
         &'a self,
         package_name: &'a PackageName,
-        range: &'a Range<Version>,
-        version_map: &'a VersionMap,
+        range: &Range<Version>,
+        version_maps: &'a [VersionMap],
+        preferences: &'a Preferences,
+        installed_packages: &'a InstalledPackages,
+        exclusions: &'a Exclusions,
+    ) -> Option<Candidate<'a>> {
+        if let Some(preferred) = Self::get_preferred(
+            package_name,
+            range,
+            version_maps,
+            preferences,
+            installed_packages,
+            exclusions,
+        ) {
+            return Some(preferred);
+        }
+
+        self.select_no_preference(package_name, range, version_maps)
+    }
+
+    /// Get a preferred version if one exists. This is the preference from a lockfile or a locally
+    /// installed version.
+    fn get_preferred<'a, InstalledPackages: InstalledPackagesProvider>(
+        package_name: &'a PackageName,
+        range: &Range<Version>,
+        version_maps: &'a [VersionMap],
         preferences: &'a Preferences,
         installed_packages: &'a InstalledPackages,
         exclusions: &'a Exclusions,
@@ -107,7 +131,10 @@ impl CandidateSelector {
                 }
 
                 // Check for a remote distribution that matches the preferred version
-                if let Some(file) = version_map.get(version) {
+                if let Some(file) = version_maps
+                    .iter()
+                    .find_map(|version_map| version_map.get(version))
+                {
                     return Some(Candidate::new(package_name, version, file));
                 }
             }
@@ -138,8 +165,12 @@ impl CandidateSelector {
             }
         }
 
-        // Determine the appropriate prerelease strategy for the current package.
-        let allow_prerelease = match &self.prerelease_strategy {
+        None
+    }
+
+    /// Determine the appropriate prerelease strategy for the current package.
+    fn allow_prereleases(&self, package_name: &PackageName) -> AllowPreRelease {
+        match &self.prerelease_strategy {
             PreReleaseStrategy::Disallow => AllowPreRelease::No,
             PreReleaseStrategy::Allow => AllowPreRelease::Yes,
             PreReleaseStrategy::IfNecessary => AllowPreRelease::IfNecessary,
@@ -157,40 +188,50 @@ impl CandidateSelector {
                     AllowPreRelease::IfNecessary
                 }
             }
-        };
+        }
+    }
 
+    /// Select a [`Candidate`] without checking for version preference such as an existing
+    /// lockfile.
+    pub(crate) fn select_no_preference<'a>(
+        &'a self,
+        package_name: &'a PackageName,
+        range: &Range<Version>,
+        version_maps: &'a [VersionMap],
+    ) -> Option<Candidate> {
         tracing::trace!(
-            "selecting candidate for package {:?} with range {:?} with {} remote versions",
+            "selecting candidate for package {} with range {:?} with {} remote versions",
             package_name,
             range,
-            version_map.len()
+            version_maps.iter().map(VersionMap::len).sum::<usize>(),
         );
-        match &self.resolution_strategy {
-            ResolutionStrategy::Highest => Self::select_candidate(
-                version_map.iter().rev(),
-                package_name,
-                range,
-                allow_prerelease,
-            ),
-            ResolutionStrategy::Lowest => {
+        let highest = self.use_highest_version(package_name);
+        let allow_prerelease = self.allow_prereleases(package_name);
+
+        if highest {
+            version_maps.iter().find_map(|version_map| {
+                Self::select_candidate(
+                    version_map.iter().rev(),
+                    package_name,
+                    range,
+                    allow_prerelease,
+                )
+            })
+        } else {
+            version_maps.iter().find_map(|version_map| {
                 Self::select_candidate(version_map.iter(), package_name, range, allow_prerelease)
-            }
+            })
+        }
+    }
+
+    /// By default, we select the latest version, but we also allow using the lowest version instead
+    /// to check the lower bounds.
+    pub(crate) fn use_highest_version(&self, package_name: &PackageName) -> bool {
+        match &self.resolution_strategy {
+            ResolutionStrategy::Highest => true,
+            ResolutionStrategy::Lowest => false,
             ResolutionStrategy::LowestDirect(direct_dependencies) => {
-                if direct_dependencies.contains(package_name) {
-                    Self::select_candidate(
-                        version_map.iter(),
-                        package_name,
-                        range,
-                        allow_prerelease,
-                    )
-                } else {
-                    Self::select_candidate(
-                        version_map.iter().rev(),
-                        package_name,
-                        range,
-                        allow_prerelease,
-                    )
-                }
+                !direct_dependencies.contains(package_name)
             }
         }
     }
@@ -198,7 +239,7 @@ impl CandidateSelector {
     /// Select the first-matching [`Candidate`] from a set of candidate versions and files,
     /// preferring wheels over source distributions.
     fn select_candidate<'a>(
-        versions: impl Iterator<Item = (&'a Version, VersionMapDistHandle<'a>)>,
+        versions: impl Iterator<Item = (&'a Version, VersionMapDistHandle<'a>)> + ExactSizeIterator,
         package_name: &'a PackageName,
         range: &Range<Version>,
         allow_prerelease: AllowPreRelease,
@@ -210,10 +251,8 @@ impl CandidateSelector {
         }
 
         let mut prerelease = None;
-        let mut steps = 0;
-        for (version, maybe_dist) in versions {
-            steps += 1;
-
+        let versions_len = versions.len();
+        for (step, (version, maybe_dist)) in versions.enumerate() {
             let candidate = if version.any_prerelease() {
                 if range.contains(version) {
                     match allow_prerelease {
@@ -226,7 +265,7 @@ impl CandidateSelector {
                                  after {} steps: {:?} version",
                                 package_name,
                                 range,
-                                steps,
+                                step,
                                 version,
                             );
                             // If pre-releases are allowed, treat them equivalently
@@ -267,7 +306,7 @@ impl CandidateSelector {
                          after {} steps: {:?} version",
                         package_name,
                         range,
-                        steps,
+                        step,
                         version,
                     );
                     Candidate::new(package_name, version, dist)
@@ -299,7 +338,7 @@ impl CandidateSelector {
              after {} steps",
             package_name,
             range,
-            steps,
+            versions_len,
         );
         match prerelease {
             None => None,
diff --git a/crates/uv-resolver/src/error.rs b/crates/uv-resolver/src/error.rs
index 6cf92bf4c..8391ad6aa 100644
--- a/crates/uv-resolver/src/error.rs
+++ b/crates/uv-resolver/src/error.rs
@@ -1,4 +1,4 @@
-use std::collections::BTreeSet;
+use std::collections::{BTreeMap, BTreeSet};
 use std::fmt::Formatter;
 use std::ops::Deref;
 
@@ -20,7 +20,7 @@ use crate::candidate_selector::CandidateSelector;
 use crate::dependency_provider::UvDependencyProvider;
 use crate::pubgrub::{PubGrubPackage, PubGrubPython, PubGrubReportFormatter};
 use crate::python_requirement::PythonRequirement;
-use crate::resolver::{UnavailablePackage, VersionsResponse};
+use crate::resolver::{IncompletePackage, UnavailablePackage, VersionsResponse};
 
 #[derive(Debug, thiserror::Error)]
 pub enum ResolveError {
@@ -93,6 +93,9 @@ pub enum ResolveError {
     #[error("Attempted to construct an invalid version specifier")]
     InvalidVersion(#[from] pep440_rs::VersionSpecifierBuildError),
 
+    #[error("In `--require-hashes` mode, all requirements must be pinned upfront with `==`, but found: {0}")]
+    UnhashedPackage(PackageName),
+
     /// Something unexpected happened.
     #[error("{0}")]
     Failure(String),
@@ -125,6 +128,7 @@ impl From<pubgrub::error::PubGrubError<UvDependencyProvider>> for ResolveError {
                     python_requirement: None,
                     index_locations: None,
                     unavailable_packages: FxHashMap::default(),
+                    incomplete_packages: FxHashMap::default(),
                 })
             }
             pubgrub::error::PubGrubError::SelfDependency { package, version } => {
@@ -146,6 +150,7 @@ pub struct NoSolutionError {
     python_requirement: Option<PythonRequirement>,
     index_locations: Option<IndexLocations>,
     unavailable_packages: FxHashMap<PackageName, UnavailablePackage>,
+    incomplete_packages: FxHashMap<PackageName, BTreeMap<Version, IncompletePackage>>,
 }
 
 impl std::error::Error for NoSolutionError {}
@@ -167,6 +172,7 @@ impl std::fmt::Display for NoSolutionError {
             &self.selector,
             &self.index_locations,
             &self.unavailable_packages,
+            &self.incomplete_packages,
         ) {
             write!(f, "\n\n{hint}")?;
         }
@@ -209,14 +215,15 @@ impl NoSolutionError {
                     // we represent the state of the resolver at the time of failure.
                     if visited.contains(name) {
                         if let Some(response) = package_versions.get(name) {
-                            if let VersionsResponse::Found(ref version_map) = *response {
-                                available_versions.insert(
-                                    package.clone(),
-                                    version_map
-                                        .iter()
-                                        .map(|(version, _)| version.clone())
-                                        .collect(),
-                                );
+                            if let VersionsResponse::Found(ref version_maps) = *response {
+                                for version_map in version_maps {
+                                    available_versions
+                                        .entry(package.clone())
+                                        .or_insert_with(BTreeSet::new)
+                                        .extend(
+                                            version_map.iter().map(|(version, _)| version.clone()),
+                                        );
+                                }
                             }
                         }
                     }
@@ -260,6 +267,30 @@ impl NoSolutionError {
         self
     }
 
+    /// Update the incomplete packages attached to the error.
+    #[must_use]
+    pub(crate) fn with_incomplete_packages(
+        mut self,
+        incomplete_packages: &DashMap<PackageName, DashMap<Version, IncompletePackage>>,
+    ) -> Self {
+        let mut new = FxHashMap::default();
+        for package in self.derivation_tree.packages() {
+            if let PubGrubPackage::Package(name, ..) = package {
+                if let Some(entry) = incomplete_packages.get(name) {
+                    let versions = entry.value();
+                    for entry in versions {
+                        let (version, reason) = entry.pair();
+                        new.entry(name.clone())
+                            .or_insert_with(BTreeMap::default)
+                            .insert(version.clone(), reason.clone());
+                    }
+                }
+            }
+        }
+        self.incomplete_packages = new;
+        self
+    }
+
     /// Update the Python requirements attached to the error.
     #[must_use]
     pub(crate) fn with_python_requirement(
diff --git a/crates/uv-resolver/src/exclusions.rs b/crates/uv-resolver/src/exclusions.rs
index e7c6ade4d..34593af9d 100644
--- a/crates/uv-resolver/src/exclusions.rs
+++ b/crates/uv-resolver/src/exclusions.rs
@@ -1,6 +1,6 @@
 use pep508_rs::PackageName;
 use rustc_hash::FxHashSet;
-use uv_types::{Reinstall, Upgrade};
+use uv_configuration::{Reinstall, Upgrade};
 
 /// Tracks locally installed packages that should not be selected during resolution.
 #[derive(Debug, Default, Clone)]
diff --git a/crates/uv-resolver/src/flat_index.rs b/crates/uv-resolver/src/flat_index.rs
new file mode 100644
index 000000000..f37577c85
--- /dev/null
+++ b/crates/uv-resolver/src/flat_index.rs
@@ -0,0 +1,231 @@
+use std::collections::btree_map::Entry;
+use std::collections::BTreeMap;
+
+use rustc_hash::FxHashMap;
+use tracing::instrument;
+
+use distribution_filename::{DistFilename, SourceDistFilename, WheelFilename};
+use distribution_types::{
+    BuiltDist, Dist, File, Hash, HashPolicy, IncompatibleSource, IncompatibleWheel, IndexUrl,
+    PrioritizedDist, RegistryBuiltDist, RegistrySourceDist, SourceDist, SourceDistCompatibility,
+    WheelCompatibility,
+};
+use pep440_rs::Version;
+use platform_tags::{TagCompatibility, Tags};
+use pypi_types::HashDigest;
+use uv_client::FlatIndexEntries;
+use uv_configuration::{NoBinary, NoBuild};
+use uv_normalize::PackageName;
+use uv_types::HashStrategy;
+
+/// A set of [`PrioritizedDist`] from a `--find-links` entry, indexed by [`PackageName`]
+/// and [`Version`].
+#[derive(Debug, Clone, Default)]
+pub struct FlatIndex {
+    /// The list of [`FlatDistributions`] from the `--find-links` entries, indexed by package name.
+    index: FxHashMap<PackageName, FlatDistributions>,
+    /// Whether any `--find-links` entries could not be resolved due to a lack of network
+    /// connectivity.
+    offline: bool,
+}
+
+impl FlatIndex {
+    /// Collect all files from a `--find-links` target into a [`FlatIndex`].
+    #[instrument(skip_all)]
+    pub fn from_entries(
+        entries: FlatIndexEntries,
+        tags: &Tags,
+        hasher: &HashStrategy,
+        no_build: &NoBuild,
+        no_binary: &NoBinary,
+    ) -> Self {
+        // Collect compatible distributions.
+        let mut index = FxHashMap::default();
+        for (filename, file, url) in entries.entries {
+            let distributions = index.entry(filename.name().clone()).or_default();
+            Self::add_file(
+                distributions,
+                file,
+                filename,
+                tags,
+                hasher,
+                no_build,
+                no_binary,
+                url,
+            );
+        }
+
+        // Collect offline entries.
+        let offline = entries.offline;
+
+        Self { index, offline }
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    fn add_file(
+        distributions: &mut FlatDistributions,
+        file: File,
+        filename: DistFilename,
+        tags: &Tags,
+        hasher: &HashStrategy,
+        no_build: &NoBuild,
+        no_binary: &NoBinary,
+        index: IndexUrl,
+    ) {
+        // No `requires-python` here: for source distributions, we don't have that information;
+        // for wheels, we read it lazily only when selected.
+        match filename {
+            DistFilename::WheelFilename(filename) => {
+                let version = filename.version.clone();
+
+                let compatibility =
+                    Self::wheel_compatibility(&filename, &file.hashes, tags, hasher, no_binary);
+                let dist = Dist::Built(BuiltDist::Registry(RegistryBuiltDist {
+                    filename,
+                    file: Box::new(file),
+                    index,
+                }));
+                match distributions.0.entry(version) {
+                    Entry::Occupied(mut entry) => {
+                        entry.get_mut().insert_built(dist, vec![], compatibility);
+                    }
+                    Entry::Vacant(entry) => {
+                        entry.insert(PrioritizedDist::from_built(dist, vec![], compatibility));
+                    }
+                }
+            }
+            DistFilename::SourceDistFilename(filename) => {
+                let compatibility =
+                    Self::source_dist_compatibility(&filename, &file.hashes, hasher, no_build);
+                let dist = Dist::Source(SourceDist::Registry(RegistrySourceDist {
+                    filename: filename.clone(),
+                    file: Box::new(file),
+                    index,
+                }));
+                match distributions.0.entry(filename.version) {
+                    Entry::Occupied(mut entry) => {
+                        entry.get_mut().insert_source(dist, vec![], compatibility);
+                    }
+                    Entry::Vacant(entry) => {
+                        entry.insert(PrioritizedDist::from_source(dist, vec![], compatibility));
+                    }
+                }
+            }
+        }
+    }
+
+    fn source_dist_compatibility(
+        filename: &SourceDistFilename,
+        hashes: &[HashDigest],
+        hasher: &HashStrategy,
+        no_build: &NoBuild,
+    ) -> SourceDistCompatibility {
+        // Check if source distributions are allowed for this package.
+        let no_build = match no_build {
+            NoBuild::None => false,
+            NoBuild::All => true,
+            NoBuild::Packages(packages) => packages.contains(&filename.name),
+        };
+
+        if no_build {
+            return SourceDistCompatibility::Incompatible(IncompatibleSource::NoBuild);
+        }
+
+        // Check if hashes line up
+        let hash = if let HashPolicy::Validate(required) = hasher.get_package(&filename.name) {
+            if hashes.is_empty() {
+                Hash::Missing
+            } else if required.iter().any(|hash| hashes.contains(hash)) {
+                Hash::Matched
+            } else {
+                Hash::Mismatched
+            }
+        } else {
+            Hash::Matched
+        };
+
+        SourceDistCompatibility::Compatible(hash)
+    }
+
+    fn wheel_compatibility(
+        filename: &WheelFilename,
+        hashes: &[HashDigest],
+        tags: &Tags,
+        hasher: &HashStrategy,
+        no_binary: &NoBinary,
+    ) -> WheelCompatibility {
+        // Check if binaries are allowed for this package.
+        let no_binary = match no_binary {
+            NoBinary::None => false,
+            NoBinary::All => true,
+            NoBinary::Packages(packages) => packages.contains(&filename.name),
+        };
+
+        if no_binary {
+            return WheelCompatibility::Incompatible(IncompatibleWheel::NoBinary);
+        }
+
+        // Determine a compatibility for the wheel based on tags.
+        let priority = match filename.compatibility(tags) {
+            TagCompatibility::Incompatible(tag) => {
+                return WheelCompatibility::Incompatible(IncompatibleWheel::Tag(tag))
+            }
+            TagCompatibility::Compatible(priority) => priority,
+        };
+
+        // Check if hashes line up
+        let hash = if let HashPolicy::Validate(required) = hasher.get_package(&filename.name) {
+            if hashes.is_empty() {
+                Hash::Missing
+            } else if required.iter().any(|hash| hashes.contains(hash)) {
+                Hash::Matched
+            } else {
+                Hash::Mismatched
+            }
+        } else {
+            Hash::Matched
+        };
+
+        WheelCompatibility::Compatible(hash, priority)
+    }
+
+    /// Get the [`FlatDistributions`] for the given package name.
+    pub fn get(&self, package_name: &PackageName) -> Option<&FlatDistributions> {
+        self.index.get(package_name)
+    }
+
+    /// Returns `true` if there are any offline `--find-links` entries.
+    pub fn offline(&self) -> bool {
+        self.offline
+    }
+}
+
+/// A set of [`PrioritizedDist`] from a `--find-links` entry for a single package, indexed
+/// by [`Version`].
+#[derive(Debug, Clone, Default)]
+pub struct FlatDistributions(BTreeMap<Version, PrioritizedDist>);
+
+impl FlatDistributions {
+    pub fn iter(&self) -> impl Iterator<Item = (&Version, &PrioritizedDist)> {
+        self.0.iter()
+    }
+
+    pub fn remove(&mut self, version: &Version) -> Option<PrioritizedDist> {
+        self.0.remove(version)
+    }
+}
+
+impl IntoIterator for FlatDistributions {
+    type Item = (Version, PrioritizedDist);
+    type IntoIter = std::collections::btree_map::IntoIter<Version, PrioritizedDist>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
+
+impl From<FlatDistributions> for BTreeMap<Version, PrioritizedDist> {
+    fn from(distributions: FlatDistributions) -> Self {
+        distributions.0
+    }
+}
diff --git a/crates/uv-resolver/src/lib.rs b/crates/uv-resolver/src/lib.rs
index 129bbac3e..c7fd1aea1 100644
--- a/crates/uv-resolver/src/lib.rs
+++ b/crates/uv-resolver/src/lib.rs
@@ -1,6 +1,7 @@
 pub use dependency_mode::DependencyMode;
 pub use error::ResolveError;
 pub use exclusions::Exclusions;
+pub use flat_index::FlatIndex;
 pub use manifest::Manifest;
 pub use options::{Options, OptionsBuilder};
 pub use preferences::{Preference, PreferenceError};
@@ -9,7 +10,7 @@ pub use python_requirement::PythonRequirement;
 pub use resolution::{AnnotationStyle, Diagnostic, DisplayResolutionGraph, ResolutionGraph};
 pub use resolution_mode::ResolutionMode;
 pub use resolver::{
-    BuildId, DefaultResolverProvider, InMemoryIndex, PackageVersionsResult,
+    BuildId, DefaultResolverProvider, InMemoryIndex, MetadataResponse, PackageVersionsResult,
     Reporter as ResolverReporter, Resolver, ResolverProvider, VersionsResponse,
     WheelMetadataResult,
 };
@@ -24,6 +25,7 @@ mod dependency_provider;
 mod editables;
 mod error;
 mod exclusions;
+mod flat_index;
 mod manifest;
 mod options;
 mod pins;
diff --git a/crates/uv-resolver/src/manifest.rs b/crates/uv-resolver/src/manifest.rs
index e6b6607f6..2801aef1b 100644
--- a/crates/uv-resolver/src/manifest.rs
+++ b/crates/uv-resolver/src/manifest.rs
@@ -1,8 +1,9 @@
 use distribution_types::LocalEditable;
 use pep508_rs::{MarkerEnvironment, Requirement};
 use pypi_types::Metadata23;
+use uv_configuration::{Constraints, Overrides};
 use uv_normalize::PackageName;
-use uv_types::{Constraints, Overrides, RequestedRequirements};
+use uv_types::RequestedRequirements;
 
 use crate::{preferences::Preference, Exclusions};
 
diff --git a/crates/uv-resolver/src/preferences.rs b/crates/uv-resolver/src/preferences.rs
index 95bccb464..376ceaf67 100644
--- a/crates/uv-resolver/src/preferences.rs
+++ b/crates/uv-resolver/src/preferences.rs
@@ -6,7 +6,7 @@ use pep440_rs::{Operator, Version};
 use pep508_rs::{
     MarkerEnvironment, Requirement, RequirementsTxtRequirement, UnnamedRequirement, VersionOrUrl,
 };
-use pypi_types::{HashError, Hashes};
+use pypi_types::{HashDigest, HashError};
 use requirements_txt::RequirementEntry;
 use tracing::trace;
 use uv_normalize::PackageName;
@@ -23,7 +23,7 @@ pub enum PreferenceError {
 #[derive(Clone, Debug)]
 pub struct Preference {
     requirement: Requirement,
-    hashes: Vec<Hashes>,
+    hashes: Vec<HashDigest>,
 }
 
 impl Preference {
@@ -40,7 +40,7 @@ impl Preference {
                 .hashes
                 .iter()
                 .map(String::as_str)
-                .map(Hashes::from_str)
+                .map(HashDigest::from_str)
                 .collect::<Result<_, _>>()?,
         })
     }
@@ -146,7 +146,7 @@ impl Preferences {
         &self,
         package_name: &PackageName,
         version: &Version,
-    ) -> Option<&[Hashes]> {
+    ) -> Option<&[HashDigest]> {
         self.0
             .get(package_name)
             .filter(|pin| pin.version() == version)
@@ -158,7 +158,7 @@ impl Preferences {
 #[derive(Debug, Clone)]
 struct Pin {
     version: Version,
-    hashes: Vec<Hashes>,
+    hashes: Vec<HashDigest>,
 }
 
 impl Pin {
@@ -168,7 +168,7 @@ impl Pin {
     }
 
     /// Return the hashes of the pinned package.
-    fn hashes(&self) -> &[Hashes] {
+    fn hashes(&self) -> &[HashDigest] {
         &self.hashes
     }
 }
diff --git a/crates/uv-resolver/src/pubgrub/dependencies.rs b/crates/uv-resolver/src/pubgrub/dependencies.rs
index 28760cee5..6920fb0c1 100644
--- a/crates/uv-resolver/src/pubgrub/dependencies.rs
+++ b/crates/uv-resolver/src/pubgrub/dependencies.rs
@@ -5,8 +5,8 @@ use tracing::warn;
 use distribution_types::Verbatim;
 use pep440_rs::Version;
 use pep508_rs::{MarkerEnvironment, Requirement, VersionOrUrl};
+use uv_configuration::{Constraints, Overrides};
 use uv_normalize::{ExtraName, PackageName};
-use uv_types::{Constraints, Overrides};
 
 use crate::pubgrub::specifier::PubGrubSpecifier;
 use crate::pubgrub::PubGrubPackage;
diff --git a/crates/uv-resolver/src/pubgrub/report.rs b/crates/uv-resolver/src/pubgrub/report.rs
index dfb93997a..f4c7aea9e 100644
--- a/crates/uv-resolver/src/pubgrub/report.rs
+++ b/crates/uv-resolver/src/pubgrub/report.rs
@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 use std::cmp::Ordering;
-use std::collections::BTreeSet;
+use std::collections::{BTreeMap, BTreeSet};
 use std::ops::Bound;
 
 use derivative::Derivative;
@@ -17,7 +17,7 @@ use uv_normalize::PackageName;
 
 use crate::candidate_selector::CandidateSelector;
 use crate::python_requirement::PythonRequirement;
-use crate::resolver::UnavailablePackage;
+use crate::resolver::{IncompletePackage, UnavailablePackage};
 
 use super::PubGrubPackage;
 
@@ -342,6 +342,7 @@ impl PubGrubReportFormatter<'_> {
         selector: &Option<CandidateSelector>,
         index_locations: &Option<IndexLocations>,
         unavailable_packages: &FxHashMap<PackageName, UnavailablePackage>,
+        incomplete_packages: &FxHashMap<PackageName, BTreeMap<Version, IncompletePackage>>,
     ) -> IndexSet<PubGrubHint> {
         /// Returns `true` if pre-releases were allowed for a package.
         fn allowed_prerelease(package: &PubGrubPackage, selector: &CandidateSelector) -> bool {
@@ -354,7 +355,7 @@ impl PubGrubReportFormatter<'_> {
         let mut hints = IndexSet::default();
         match derivation_tree {
             DerivationTree::External(external) => match external {
-                External::NoVersions(package, set, _) => {
+                External::Unavailable(package, set, _) | External::NoVersions(package, set, _) => {
                     // Check for no versions due to pre-release options
                     if let Some(selector) = selector {
                         let any_prerelease = set.iter().any(|(start, end)| {
@@ -404,6 +405,7 @@ impl PubGrubReportFormatter<'_> {
                             index_locations.flat_index().peekable().peek().is_none();
 
                         if let PubGrubPackage::Package(name, ..) = package {
+                            // Add hints due to the package being entirely unavailable.
                             match unavailable_packages.get(name) {
                                 Some(UnavailablePackage::NoIndex) => {
                                     if no_find_links {
@@ -413,13 +415,64 @@ impl PubGrubReportFormatter<'_> {
                                 Some(UnavailablePackage::Offline) => {
                                     hints.insert(PubGrubHint::Offline);
                                 }
-                                _ => {}
+                                Some(UnavailablePackage::InvalidMetadata(reason)) => {
+                                    hints.insert(PubGrubHint::InvalidPackageMetadata {
+                                        package: package.clone(),
+                                        reason: reason.clone(),
+                                    });
+                                }
+                                Some(UnavailablePackage::InvalidStructure(reason)) => {
+                                    hints.insert(PubGrubHint::InvalidPackageStructure {
+                                        package: package.clone(),
+                                        reason: reason.clone(),
+                                    });
+                                }
+                                Some(UnavailablePackage::NotFound) => {}
+                                None => {}
+                            }
+
+                            // Add hints due to the package being unavailable at specific versions.
+                            if let Some(versions) = incomplete_packages.get(name) {
+                                for (version, incomplete) in versions.iter().rev() {
+                                    if set.contains(version) {
+                                        match incomplete {
+                                            IncompletePackage::Offline => {
+                                                hints.insert(PubGrubHint::Offline);
+                                            }
+                                            IncompletePackage::InvalidMetadata(reason) => {
+                                                hints.insert(PubGrubHint::InvalidVersionMetadata {
+                                                    package: package.clone(),
+                                                    version: version.clone(),
+                                                    reason: reason.clone(),
+                                                });
+                                            }
+                                            IncompletePackage::InconsistentMetadata(reason) => {
+                                                hints.insert(
+                                                    PubGrubHint::InconsistentVersionMetadata {
+                                                        package: package.clone(),
+                                                        version: version.clone(),
+                                                        reason: reason.clone(),
+                                                    },
+                                                );
+                                            }
+                                            IncompletePackage::InvalidStructure(reason) => {
+                                                hints.insert(
+                                                    PubGrubHint::InvalidVersionStructure {
+                                                        package: package.clone(),
+                                                        version: version.clone(),
+                                                        reason: reason.clone(),
+                                                    },
+                                                );
+                                            }
+                                        }
+                                        break;
+                                    }
+                                }
                             }
                         }
                     }
                 }
                 External::NotRoot(..) => {}
-                External::Unavailable(..) => {}
                 External::FromDependencyOf(..) => {}
             },
             DerivationTree::Derived(derived) => {
@@ -428,12 +481,14 @@ impl PubGrubReportFormatter<'_> {
                     selector,
                     index_locations,
                     unavailable_packages,
+                    incomplete_packages,
                 ));
                 hints.extend(self.hints(
                     &derived.cause2,
                     selector,
                     index_locations,
                     unavailable_packages,
+                    incomplete_packages,
                 ));
             }
         }
@@ -462,8 +517,45 @@ pub(crate) enum PubGrubHint {
     /// Requirements were unavailable due to lookups in the index being disabled and no extra
     /// index was provided via `--find-links`
     NoIndex,
-    /// A package was not found in the registry, but
+    /// A package was not found in the registry, but network access was disabled.
     Offline,
+    /// Metadata for a package could not be parsed.
+    InvalidPackageMetadata {
+        package: PubGrubPackage,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        reason: String,
+    },
+    /// The structure of a package was invalid (e.g., multiple `.dist-info` directories).
+    InvalidPackageStructure {
+        package: PubGrubPackage,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        reason: String,
+    },
+    /// Metadata for a package version could not be parsed.
+    InvalidVersionMetadata {
+        package: PubGrubPackage,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        version: Version,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        reason: String,
+    },
+    /// Metadata for a package version was inconsistent (e.g., the package name did not match that
+    /// of the file).
+    InconsistentVersionMetadata {
+        package: PubGrubPackage,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        version: Version,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        reason: String,
+    },
+    /// The structure of a package version was invalid (e.g., multiple `.dist-info` directories).
+    InvalidVersionStructure {
+        package: PubGrubPackage,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        version: Version,
+        #[derivative(PartialEq = "ignore", Hash = "ignore")]
+        reason: String,
+    },
 }
 
 impl std::fmt::Display for PubGrubHint {
@@ -505,6 +597,71 @@ impl std::fmt::Display for PubGrubHint {
                     ":".bold(),
                 )
             }
+            Self::InvalidPackageMetadata { package, reason } => {
+                write!(
+                    f,
+                    "{}{} Metadata for {} could not be parsed:\n{}",
+                    "hint".bold().cyan(),
+                    ":".bold(),
+                    package.bold(),
+                    textwrap::indent(reason, "  ")
+                )
+            }
+            Self::InvalidPackageStructure { package, reason } => {
+                write!(
+                    f,
+                    "{}{} The structure of {} was invalid:\n{}",
+                    "hint".bold().cyan(),
+                    ":".bold(),
+                    package.bold(),
+                    textwrap::indent(reason, "  ")
+                )
+            }
+            Self::InvalidVersionMetadata {
+                package,
+                version,
+                reason,
+            } => {
+                write!(
+                    f,
+                    "{}{} Metadata for {}=={} could not be parsed:\n{}",
+                    "hint".bold().cyan(),
+                    ":".bold(),
+                    package.bold(),
+                    version.bold(),
+                    textwrap::indent(reason, "  ")
+                )
+            }
+            Self::InvalidVersionStructure {
+                package,
+                version,
+                reason,
+            } => {
+                write!(
+                    f,
+                    "{}{} The structure of {}=={} was invalid:\n{}",
+                    "hint".bold().cyan(),
+                    ":".bold(),
+                    package.bold(),
+                    version.bold(),
+                    textwrap::indent(reason, "  ")
+                )
+            }
+            PubGrubHint::InconsistentVersionMetadata {
+                package,
+                version,
+                reason,
+            } => {
+                write!(
+                    f,
+                    "{}{} Metadata for {}=={} was inconsistent:\n{}",
+                    "hint".bold().cyan(),
+                    ":".bold(),
+                    package.bold(),
+                    version.bold(),
+                    textwrap::indent(reason, "  ")
+                )
+            }
         }
     }
 }
diff --git a/crates/uv-resolver/src/resolution.rs b/crates/uv-resolver/src/resolution.rs
index 667f79154..533a979b0 100644
--- a/crates/uv-resolver/src/resolution.rs
+++ b/crates/uv-resolver/src/resolution.rs
@@ -12,13 +12,13 @@ use pubgrub::type_aliases::SelectedDependencies;
 use rustc_hash::{FxHashMap, FxHashSet};
 
 use distribution_types::{
-    Dist, DistributionMetadata, LocalEditable, Name, PackageId, ResolvedDist, Verbatim,
+    Dist, DistributionMetadata, IndexUrl, LocalEditable, Name, ResolvedDist, Verbatim, VersionId,
     VersionOrUrl,
 };
 use once_map::OnceMap;
 use pep440_rs::Version;
 use pep508_rs::MarkerEnvironment;
-use pypi_types::{Hashes, Metadata23};
+use pypi_types::HashDigest;
 use uv_distribution::to_precise;
 use uv_normalize::{ExtraName, PackageName};
 
@@ -28,7 +28,7 @@ use crate::pins::FilePins;
 use crate::preferences::Preferences;
 use crate::pubgrub::{PubGrubDistribution, PubGrubPackage};
 use crate::redirect::apply_redirect;
-use crate::resolver::{InMemoryIndex, VersionsResponse};
+use crate::resolver::{InMemoryIndex, MetadataResponse, VersionsResponse};
 use crate::{Manifest, ResolveError};
 
 /// Indicate the style of annotation comments, used to indicate the dependencies that requested each
@@ -50,7 +50,7 @@ pub struct ResolutionGraph {
     /// The underlying graph.
     petgraph: petgraph::graph::Graph<ResolvedDist, Range<Version>, petgraph::Directed>,
     /// The metadata for every distribution in this resolution.
-    hashes: FxHashMap<PackageName, Vec<Hashes>>,
+    hashes: FxHashMap<PackageName, Vec<HashDigest>>,
     /// The enabled extras for every distribution in this resolution.
     extras: FxHashMap<PackageName, Vec<ExtraName>>,
     /// The set of editable requirements in this resolution.
@@ -66,7 +66,7 @@ impl ResolutionGraph {
         selection: &SelectedDependencies<UvDependencyProvider>,
         pins: &FilePins,
         packages: &OnceMap<PackageName, VersionsResponse>,
-        distributions: &OnceMap<PackageId, Metadata23>,
+        distributions: &OnceMap<VersionId, MetadataResponse>,
         state: &State<UvDependencyProvider>,
         preferences: &Preferences,
         editables: Editables,
@@ -96,15 +96,20 @@ impl ResolutionGraph {
 
                     // Add its hashes to the index, preserving those that were already present in
                     // the lockfile if necessary.
-                    if let Some(hash) = preferences.match_hashes(package_name, version) {
-                        hashes.insert(package_name.clone(), hash.to_vec());
+                    if let Some(digests) = preferences
+                        .match_hashes(package_name, version)
+                        .filter(|digests| !digests.is_empty())
+                    {
+                        hashes.insert(package_name.clone(), digests.to_vec());
                     } else if let Some(versions_response) = packages.get(package_name) {
-                        if let VersionsResponse::Found(ref version_map) = *versions_response {
-                            hashes.insert(package_name.clone(), {
-                                let mut hash = version_map.hashes(version);
-                                hash.sort_unstable();
-                                hash
-                            });
+                        if let VersionsResponse::Found(ref version_maps) = *versions_response {
+                            for version_map in version_maps {
+                                if let Some(mut digests) = version_map.hashes(version) {
+                                    digests.sort_unstable();
+                                    hashes.insert(package_name.clone(), digests);
+                                    break;
+                                }
+                            }
                         }
                     }
 
@@ -124,15 +129,18 @@ impl ResolutionGraph {
 
                     // Add its hashes to the index, preserving those that were already present in
                     // the lockfile if necessary.
-                    if let Some(hash) = preferences.match_hashes(package_name, version) {
-                        hashes.insert(package_name.clone(), hash.to_vec());
-                    } else if let Some(versions_response) = packages.get(package_name) {
-                        if let VersionsResponse::Found(ref version_map) = *versions_response {
-                            hashes.insert(package_name.clone(), {
-                                let mut hash = version_map.hashes(version);
-                                hash.sort_unstable();
-                                hash
-                            });
+                    if let Some(digests) = preferences
+                        .match_hashes(package_name, version)
+                        .filter(|digests| !digests.is_empty())
+                    {
+                        hashes.insert(package_name.clone(), digests.to_vec());
+                    } else if let Some(metadata_response) =
+                        distributions.get(&pinned_package.version_id())
+                    {
+                        if let MetadataResponse::Found(ref archive) = *metadata_response {
+                            let mut digests = archive.hashes.clone();
+                            digests.sort_unstable();
+                            hashes.insert(package_name.clone(), digests);
                         }
                     }
 
@@ -160,14 +168,21 @@ impl ResolutionGraph {
                             });
                         }
                     } else {
-                        let metadata = distributions.get(&dist.package_id()).unwrap_or_else(|| {
+                        let response = distributions.get(&dist.version_id()).unwrap_or_else(|| {
                             panic!(
                                 "Every package should have metadata: {:?}",
-                                dist.package_id()
+                                dist.version_id()
                             )
                         });
 
-                        if metadata.provides_extras.contains(extra) {
+                        let MetadataResponse::Found(archive) = &*response else {
+                            panic!(
+                                "Every package should have metadata: {:?}",
+                                dist.version_id()
+                            )
+                        };
+
+                        if archive.metadata.provides_extras.contains(extra) {
                             extras
                                 .entry(package_name.clone())
                                 .or_insert_with(Vec::new)
@@ -207,14 +222,21 @@ impl ResolutionGraph {
                             });
                         }
                     } else {
-                        let metadata = distributions.get(&dist.package_id()).unwrap_or_else(|| {
+                        let response = distributions.get(&dist.version_id()).unwrap_or_else(|| {
                             panic!(
                                 "Every package should have metadata: {:?}",
-                                dist.package_id()
+                                dist.version_id()
                             )
                         });
 
-                        if metadata.provides_extras.contains(extra) {
+                        let MetadataResponse::Found(archive) = &*response else {
+                            panic!(
+                                "Every package should have metadata: {:?}",
+                                dist.version_id()
+                            )
+                        };
+
+                        if archive.metadata.provides_extras.contains(extra) {
                             extras
                                 .entry(package_name.clone())
                                 .or_insert_with(Vec::new)
@@ -407,17 +429,23 @@ impl ResolutionGraph {
         let mut seen_marker_values = FxHashSet::default();
         for i in self.petgraph.node_indices() {
             let dist = &self.petgraph[i];
-            let package_id = match dist.version_or_url() {
+            let version_id = match dist.version_or_url() {
                 VersionOrUrl::Version(version) => {
-                    PackageId::from_registry(dist.name().clone(), version.clone())
+                    VersionId::from_registry(dist.name().clone(), version.clone())
                 }
-                VersionOrUrl::Url(verbatim_url) => PackageId::from_url(verbatim_url.raw()),
+                VersionOrUrl::Url(verbatim_url) => VersionId::from_url(verbatim_url.raw()),
             };
-            let md = index
+            let res = index
                 .distributions
-                .get(&package_id)
+                .get(&version_id)
                 .expect("every package in resolution graph has metadata");
-            for req in manifest.apply(&md.requires_dist) {
+            let MetadataResponse::Found(archive, ..) = &*res else {
+                panic!(
+                    "Every package should have metadata: {:?}",
+                    dist.version_id()
+                )
+            };
+            for req in manifest.apply(&archive.metadata.requires_dist) {
                 let Some(ref marker_tree) = req.marker else {
                     continue;
                 };
@@ -469,6 +497,7 @@ impl ResolutionGraph {
 
 /// A [`std::fmt::Display`] implementation for the resolution graph.
 #[derive(Debug)]
+#[allow(clippy::struct_excessive_bools)]
 pub struct DisplayResolutionGraph<'a> {
     /// The underlying graph.
     resolution: &'a ResolutionGraph,
@@ -481,6 +510,8 @@ pub struct DisplayResolutionGraph<'a> {
     /// Whether to include annotations in the output, to indicate which dependency or dependencies
     /// requested each package.
     include_annotations: bool,
+    /// Whether to include indexes in the output, to indicate which index was used for each package.
+    include_index_annotation: bool,
     /// The style of annotation comments, used to indicate the dependencies that requested each
     /// package.
     annotation_style: AnnotationStyle,
@@ -494,6 +525,7 @@ impl<'a> From<&'a ResolutionGraph> for DisplayResolutionGraph<'a> {
             false,
             false,
             true,
+            false,
             AnnotationStyle::default(),
         )
     }
@@ -501,12 +533,14 @@ impl<'a> From<&'a ResolutionGraph> for DisplayResolutionGraph<'a> {
 
 impl<'a> DisplayResolutionGraph<'a> {
     /// Create a new [`DisplayResolutionGraph`] for the given graph.
+    #[allow(clippy::fn_params_excessive_bools)]
     pub fn new(
         underlying: &'a ResolutionGraph,
         no_emit_packages: &'a [PackageName],
         show_hashes: bool,
         include_extras: bool,
         include_annotations: bool,
+        include_index_annotation: bool,
         annotation_style: AnnotationStyle,
     ) -> DisplayResolutionGraph<'a> {
         Self {
@@ -515,6 +549,7 @@ impl<'a> DisplayResolutionGraph<'a> {
             show_hashes,
             include_extras,
             include_annotations,
+            include_index_annotation,
             annotation_style,
         }
     }
@@ -552,6 +587,14 @@ impl<'a> Node<'a> {
             Node::Distribution(name, _, _) => NodeKey::Distribution(name),
         }
     }
+
+    /// Return the [`IndexUrl`] of the distribution, if any.
+    fn index(&self) -> Option<&IndexUrl> {
+        match self {
+            Node::Editable(_, _) => None,
+            Node::Distribution(_, dist, _) => dist.index(),
+        }
+    }
 }
 
 impl Verbatim for Node<'_> {
@@ -625,12 +668,10 @@ impl std::fmt::Display for DisplayResolutionGraph<'_> {
                     .filter(|hashes| !hashes.is_empty())
                 {
                     for hash in hashes {
-                        if let Some(hash) = hash.to_string() {
-                            has_hashes = true;
-                            line.push_str(" \\\n");
-                            line.push_str("    --hash=");
-                            line.push_str(&hash);
-                        }
+                        has_hashes = true;
+                        line.push_str(" \\\n");
+                        line.push_str("    --hash=");
+                        line.push_str(&hash.to_string());
                     }
                 }
             }
@@ -638,6 +679,8 @@ impl std::fmt::Display for DisplayResolutionGraph<'_> {
             // Determine the annotation comment and separator (between comment and requirement).
             let mut annotation = None;
 
+            // If enabled, include annotations to indicate the dependencies that requested each
+            // package (e.g., `# via mypy`).
             if self.include_annotations {
                 // Display all dependencies.
                 let mut edges = self
@@ -692,6 +735,14 @@ impl std::fmt::Display for DisplayResolutionGraph<'_> {
                 // Write the line as is.
                 writeln!(f, "{line}")?;
             }
+
+            // If enabled, include indexes to indicate which index was used for each package (e.g.,
+            // `# from https://pypi.org/simple`).
+            if self.include_index_annotation {
+                if let Some(index) = node.index() {
+                    writeln!(f, "{}", format!("    # from {index}").green())?;
+                }
+            }
         }
 
         Ok(())
diff --git a/crates/uv-resolver/src/resolver/batch_prefetch.rs b/crates/uv-resolver/src/resolver/batch_prefetch.rs
new file mode 100644
index 000000000..558cdc2b7
--- /dev/null
+++ b/crates/uv-resolver/src/resolver/batch_prefetch.rs
@@ -0,0 +1,176 @@
+use std::cmp::min;
+
+use pubgrub::range::Range;
+use rustc_hash::FxHashMap;
+use tokio::sync::mpsc::Sender;
+use tracing::{debug, trace};
+
+use distribution_types::{DistributionMetadata, ResolvedDistRef};
+use pep440_rs::Version;
+
+use crate::candidate_selector::{CandidateDist, CandidateSelector};
+use crate::pubgrub::PubGrubPackage;
+use crate::resolver::Request;
+use crate::{InMemoryIndex, ResolveError, VersionsResponse};
+
+enum BatchPrefetchStrategy {
+    /// Go through the next versions assuming the existing selection and its constraints
+    /// remain.
+    Compatible {
+        compatible: Range<Version>,
+        previous: Version,
+    },
+    /// We encounter cases (botocore) where the above doesn't work: Say we previously selected
+    /// a==x.y.z, which depends on b==x.y.z. a==x.y.z is incompatible, but we don't know that
+    /// yet. We just selected b==x.y.z and want to prefetch, since for all versions of a we try,
+    /// we have to wait for the matching version of b. The exiting range gives us only one version
+    /// of b, so the compatible strategy doesn't prefetch any version. Instead, we try the next
+    /// heuristic where the next version of b will be x.y.(z-1) and so forth.
+    InOrder { previous: Version },
+}
+
+/// Prefetch a large number of versions if we already unsuccessfully tried many versions.
+///
+/// This is an optimization specifically targeted at cold cache urllib3/boto3/botocore, where we
+/// have to fetch the metadata for a lot of versions.
+///
+/// Note that these all heuristics that could totally prefetch lots of irrelevant versions.
+#[derive(Default)]
+pub(crate) struct BatchPrefetcher {
+    tried_versions: FxHashMap<PubGrubPackage, usize>,
+    last_prefetch: FxHashMap<PubGrubPackage, usize>,
+}
+
+impl BatchPrefetcher {
+    /// Prefetch a large number of versions if we already unsuccessfully tried many versions.
+    pub(crate) async fn prefetch_batches(
+        &mut self,
+        next: &PubGrubPackage,
+        version: &Version,
+        current_range: &Range<Version>,
+        request_sink: &Sender<Request>,
+        index: &InMemoryIndex,
+        selector: &CandidateSelector,
+    ) -> anyhow::Result<(), ResolveError> {
+        let PubGrubPackage::Package(package_name, None, None) = &next else {
+            return Ok(());
+        };
+
+        let (num_tried, do_prefetch) = self.should_prefetch(next);
+        if !do_prefetch {
+            return Ok(());
+        }
+        let total_prefetch = min(num_tried, 50);
+
+        // This is immediate, we already fetched the version map.
+        let versions_response = index
+            .packages
+            .wait(package_name)
+            .await
+            .ok_or(ResolveError::Unregistered)?;
+
+        let VersionsResponse::Found(ref version_map) = *versions_response else {
+            return Ok(());
+        };
+
+        let mut phase = BatchPrefetchStrategy::Compatible {
+            compatible: current_range.clone(),
+            previous: version.clone(),
+        };
+        let mut prefetch_count = 0;
+        for _ in 0..total_prefetch {
+            let candidate = match phase {
+                BatchPrefetchStrategy::Compatible {
+                    compatible,
+                    previous,
+                } => {
+                    if let Some(candidate) =
+                        selector.select_no_preference(package_name, &compatible, version_map)
+                    {
+                        let compatible = compatible.intersection(
+                            &Range::singleton(candidate.version().clone()).complement(),
+                        );
+                        phase = BatchPrefetchStrategy::Compatible {
+                            compatible,
+                            previous: candidate.version().clone(),
+                        };
+                        candidate
+                    } else {
+                        // We exhausted the compatible version, switch to ignoring the existing
+                        // constraints on the package and instead going through versions in order.
+                        phase = BatchPrefetchStrategy::InOrder { previous };
+                        continue;
+                    }
+                }
+                BatchPrefetchStrategy::InOrder { previous } => {
+                    let range = if selector.use_highest_version(package_name) {
+                        Range::strictly_lower_than(previous)
+                    } else {
+                        Range::strictly_higher_than(previous)
+                    };
+                    if let Some(candidate) =
+                        selector.select_no_preference(package_name, &range, version_map)
+                    {
+                        phase = BatchPrefetchStrategy::InOrder {
+                            previous: candidate.version().clone(),
+                        };
+                        candidate
+                    } else {
+                        // Both strategies exhausted their candidates.
+                        break;
+                    }
+                }
+            };
+
+            let CandidateDist::Compatible(dist) = candidate.dist() else {
+                continue;
+            };
+            // Avoid building a lot of source distributions.
+            if !dist.prefetchable() {
+                continue;
+            }
+            let dist = dist.for_resolution();
+
+            // Emit a request to fetch the metadata for this version.
+            trace!(
+                "Prefetching {prefetch_count} ({}) {}",
+                match phase {
+                    BatchPrefetchStrategy::Compatible { .. } => "compatible",
+                    BatchPrefetchStrategy::InOrder { .. } => "in order",
+                },
+                dist
+            );
+            prefetch_count += 1;
+            if index.distributions.register(candidate.version_id()) {
+                let request = match dist {
+                    ResolvedDistRef::Installable(dist) => Request::Dist(dist.clone()),
+                    ResolvedDistRef::Installed(dist) => Request::Installed(dist.clone()),
+                };
+                request_sink.send(request).await?;
+            }
+        }
+
+        debug!("Prefetching {prefetch_count} {package_name} versions");
+
+        self.last_prefetch.insert(next.clone(), num_tried);
+        Ok(())
+    }
+
+    /// Each time we tried a version for a package, we register that here.
+    pub(crate) fn version_tried(&mut self, package: PubGrubPackage) {
+        *self.tried_versions.entry(package).or_default() += 1;
+    }
+
+    /// After 5, 10, 20, 40 tried versions, prefetch that many versions to start early but not
+    /// too aggressive. Later we schedule the prefetch of 50 versions every 20 versions, this gives
+    /// us a good buffer until we see prefetch again and is high enough to saturate the task pool.
+    fn should_prefetch(&self, next: &PubGrubPackage) -> (usize, bool) {
+        let num_tried = self.tried_versions.get(next).copied().unwrap_or_default();
+        let previous_prefetch = self.last_prefetch.get(next).copied().unwrap_or_default();
+        let do_prefetch = (num_tried >= 5 && previous_prefetch < 5)
+            || (num_tried >= 10 && previous_prefetch < 10)
+            || (num_tried >= 20 && previous_prefetch < 20)
+            || (num_tried >= 20 && num_tried - previous_prefetch >= 20);
+        (num_tried, do_prefetch)
+    }
+}
diff --git a/crates/uv-resolver/src/resolver/index.rs b/crates/uv-resolver/src/resolver/index.rs
index 7b4e1e336..614baf206 100644
--- a/crates/uv-resolver/src/resolver/index.rs
+++ b/crates/uv-resolver/src/resolver/index.rs
@@ -1,11 +1,10 @@
 use std::sync::Arc;
 
-use distribution_types::PackageId;
+use distribution_types::VersionId;
 use once_map::OnceMap;
-use pypi_types::Metadata23;
 use uv_normalize::PackageName;
 
-use crate::resolver::provider::VersionsResponse;
+use crate::resolver::provider::{MetadataResponse, VersionsResponse};
 
 /// In-memory index of package metadata.
 #[derive(Default)]
@@ -15,18 +14,18 @@ pub struct InMemoryIndex {
     pub(crate) packages: OnceMap<PackageName, VersionsResponse>,
 
     /// A map from package ID to metadata for that distribution.
-    pub(crate) distributions: OnceMap<PackageId, Metadata23>,
+    pub(crate) distributions: OnceMap<VersionId, MetadataResponse>,
 }
 
 impl InMemoryIndex {
     /// Insert a [`VersionsResponse`] into the index.
-    pub fn insert_package(&self, package_name: PackageName, metadata: VersionsResponse) {
-        self.packages.done(package_name, metadata);
+    pub fn insert_package(&self, package_name: PackageName, response: VersionsResponse) {
+        self.packages.done(package_name, response);
     }
 
     /// Insert a [`Metadata23`] into the index.
-    pub fn insert_metadata(&self, package_id: PackageId, metadata: Metadata23) {
-        self.distributions.done(package_id, metadata);
+    pub fn insert_metadata(&self, version_id: VersionId, response: MetadataResponse) {
+        self.distributions.done(version_id, response);
     }
 
     /// Get the [`VersionsResponse`] for a given package name, without waiting.
@@ -34,8 +33,8 @@ impl InMemoryIndex {
         self.packages.get(package_name)
     }
 
-    /// Get the [`Metadata23`] for a given package ID, without waiting.
-    pub fn get_metadata(&self, package_id: &PackageId) -> Option<Arc<Metadata23>> {
-        self.distributions.get(package_id)
+    /// Get the [`MetadataResponse`] for a given package ID, without waiting.
+    pub fn get_metadata(&self, version_id: &VersionId) -> Option<Arc<MetadataResponse>> {
+        self.distributions.get(version_id)
     }
 }
diff --git a/crates/uv-resolver/src/resolver/mod.rs b/crates/uv-resolver/src/resolver/mod.rs
index 5b99e307d..74a564682 100644
--- a/crates/uv-resolver/src/resolver/mod.rs
+++ b/crates/uv-resolver/src/resolver/mod.rs
@@ -6,7 +6,6 @@ use std::ops::Deref;
 use std::sync::Arc;
 
 use anyhow::Result;
-
 use dashmap::{DashMap, DashSet};
 use futures::{FutureExt, StreamExt};
 use itertools::Itertools;
@@ -15,7 +14,7 @@ use pubgrub::range::Range;
 use pubgrub::solver::{Incompatibility, State};
 use rustc_hash::{FxHashMap, FxHashSet};
 use tokio_stream::wrappers::ReceiverStream;
-use tracing::{debug, info_span, instrument, trace, Instrument};
+use tracing::{debug, info_span, instrument, trace, warn, Instrument};
 
 use distribution_types::{
     BuiltDist, Dist, DistributionMetadata, IncompatibleDist, IncompatibleSource, IncompatibleWheel,
@@ -27,14 +26,14 @@ use pep508_rs::{MarkerEnvironment, Requirement};
 use platform_tags::Tags;
 use pypi_types::Metadata23;
 pub(crate) use urls::Urls;
-use uv_client::{FlatIndex, RegistryClient};
-use uv_distribution::DistributionDatabase;
+use uv_client::RegistryClient;
+use uv_configuration::{Constraints, Overrides};
+use uv_distribution::{ArchiveMetadata, DistributionDatabase};
 use uv_interpreter::Interpreter;
 use uv_normalize::PackageName;
-use uv_types::{BuildContext, Constraints, InstalledPackagesProvider, Overrides};
+use uv_types::{BuildContext, HashStrategy, InstalledPackagesProvider};
 
 use crate::candidate_selector::{CandidateDist, CandidateSelector};
-
 use crate::editables::Editables;
 use crate::error::ResolveError;
 use crate::manifest::Manifest;
@@ -46,16 +45,18 @@ use crate::pubgrub::{
 };
 use crate::python_requirement::PythonRequirement;
 use crate::resolution::ResolutionGraph;
+use crate::resolver::batch_prefetch::BatchPrefetcher;
 pub use crate::resolver::index::InMemoryIndex;
 pub use crate::resolver::provider::{
-    DefaultResolverProvider, PackageVersionsResult, ResolverProvider, VersionsResponse,
-    WheelMetadataResult,
+    DefaultResolverProvider, MetadataResponse, PackageVersionsResult, ResolverProvider,
+    VersionsResponse, WheelMetadataResult,
 };
 use crate::resolver::reporter::Facade;
 pub use crate::resolver::reporter::{BuildId, Reporter};
 use crate::yanks::AllowedYanks;
-use crate::{DependencyMode, Exclusions, Options, VersionMap};
+use crate::{DependencyMode, Exclusions, FlatIndex, Options};
 
+mod batch_prefetch;
 mod index;
 mod locals;
 mod provider;
@@ -70,15 +71,32 @@ pub(crate) enum UnavailableVersion {
     IncompatibleDist(IncompatibleDist),
 }
 
-/// The package is unavailable and cannot be used
+/// The package is unavailable and cannot be used.
 #[derive(Debug, Clone)]
 pub(crate) enum UnavailablePackage {
-    /// Index lookups were disabled (i.e., `--no-index`) and the package was not found in a flat index (i.e. from `--find-links`)
+    /// Index lookups were disabled (i.e., `--no-index`) and the package was not found in a flat index (i.e. from `--find-links`).
     NoIndex,
     /// Network requests were disabled (i.e., `--offline`), and the package was not found in the cache.
     Offline,
-    /// The package was not found in the registry
+    /// The package was not found in the registry.
     NotFound,
+    /// The package metadata was found, but could not be parsed.
+    InvalidMetadata(String),
+    /// The package has an invalid structure.
+    InvalidStructure(String),
+}
+
+/// The package is unavailable at specific versions.
+#[derive(Debug, Clone)]
+pub(crate) enum IncompletePackage {
+    /// Network requests were disabled (i.e., `--offline`), and the wheel metadata was not found in the cache.
+    Offline,
+    /// The wheel metadata was found, but could not be parsed.
+    InvalidMetadata(String),
+    /// The wheel metadata was found, but the metadata was inconsistent.
+    InconsistentMetadata(String),
+    /// The wheel has an invalid structure.
+    InvalidStructure(String),
 }
 
 enum ResolverVersion {
@@ -103,13 +121,16 @@ pub struct Resolver<
     urls: Urls,
     locals: Locals,
     dependency_mode: DependencyMode,
+    hasher: &'a HashStrategy,
     markers: &'a MarkerEnvironment,
     python_requirement: PythonRequirement,
     selector: CandidateSelector,
     index: &'a InMemoryIndex,
     installed_packages: &'a InstalledPackages,
-    /// Incompatibilities for packages that are entirely unavailable
+    /// Incompatibilities for packages that are entirely unavailable.
     unavailable_packages: DashMap<PackageName, UnavailablePackage>,
+    /// Incompatibilities for packages that are unavailable at specific versions.
+    incomplete_packages: DashMap<PackageName, DashMap<Version, IncompletePackage>>,
     /// The set of all registry-based packages visited during resolution.
     visited: DashSet<PackageName>,
     reporter: Option<Arc<dyn Reporter>>,
@@ -135,6 +156,7 @@ impl<
         client: &'a RegistryClient,
         flat_index: &'a FlatIndex,
         index: &'a InMemoryIndex,
+        hasher: &'a HashStrategy,
         build_context: &'a Context,
         installed_packages: &'a InstalledPackages,
     ) -> Result<Self, ResolveError> {
@@ -145,6 +167,7 @@ impl<
             tags,
             PythonRequirement::new(interpreter, markers),
             AllowedYanks::from_manifest(&manifest, markers),
+            hasher,
             options.exclude_newer,
             build_context.no_binary(),
             build_context.no_build(),
@@ -152,6 +175,7 @@ impl<
         Self::new_custom_io(
             manifest,
             options,
+            hasher,
             markers,
             PythonRequirement::new(interpreter, markers),
             index,
@@ -168,9 +192,11 @@ impl<
     > Resolver<'a, Provider, InstalledPackages>
 {
     /// Initialize a new resolver using a user provided backend.
+    #[allow(clippy::too_many_arguments)]
     pub fn new_custom_io(
         manifest: Manifest,
         options: Options,
+        hasher: &'a HashStrategy,
         markers: &'a MarkerEnvironment,
         python_requirement: PythonRequirement,
         index: &'a InMemoryIndex,
@@ -180,6 +206,7 @@ impl<
         Ok(Self {
             index,
             unavailable_packages: DashMap::default(),
+            incomplete_packages: DashMap::default(),
             visited: DashSet::default(),
             selector: CandidateSelector::for_resolution(options, &manifest, markers),
             dependency_mode: options.dependency_mode,
@@ -192,6 +219,7 @@ impl<
             preferences: Preferences::from_iter(manifest.preferences, markers),
             exclusions: manifest.exclusions,
             editables: Editables::from_requirements(manifest.editables),
+            hasher,
             markers,
             python_requirement,
             reporter: None,
@@ -215,14 +243,14 @@ impl<
     pub async fn resolve(self) -> Result<ResolutionGraph, ResolveError> {
         // A channel to fetch package metadata (e.g., given `flask`, fetch all versions) and version
         // metadata (e.g., given `flask==1.0.0`, fetch the metadata for that version).
-        // Channel size is set to the same size as the task buffer for simplicity.
-        let (request_sink, request_stream) = tokio::sync::mpsc::channel(50);
+        // Channel size is set large to accommodate batch prefetching.
+        let (request_sink, request_stream) = tokio::sync::mpsc::channel(300);
 
         // Run the fetcher.
         let requests_fut = self.fetch(request_stream).fuse();
 
         // Run the solver.
-        let resolve_fut = self.solve(request_sink).fuse();
+        let resolve_fut = self.solve(request_sink).boxed().fuse();
 
         // Wait for both to complete.
         match tokio::try_join!(requests_fut, resolve_fut) {
@@ -242,7 +270,8 @@ impl<
                         .with_selector(self.selector.clone())
                         .with_python_requirement(&self.python_requirement)
                         .with_index_locations(self.provider.index_locations())
-                        .with_unavailable_packages(&self.unavailable_packages),
+                        .with_unavailable_packages(&self.unavailable_packages)
+                        .with_incomplete_packages(&self.incomplete_packages),
                     )
                 } else {
                     err
@@ -258,6 +287,7 @@ impl<
         request_sink: tokio::sync::mpsc::Sender<Request>,
     ) -> Result<ResolutionGraph, ResolveError> {
         let root = PubGrubPackage::Root(self.project.clone());
+        let mut prefetcher = BatchPrefetcher::default();
 
         // Keep track of the packages for which we've requested metadata.
         let mut pins = FilePins::default();
@@ -306,6 +336,8 @@ impl<
             };
             next = highest_priority_pkg;
 
+            prefetcher.version_tried(next.clone());
+
             let term_intersection = state
                 .partial_solution
                 .term_intersection_for_package(&next)
@@ -344,6 +376,12 @@ impl<
                                     UnavailablePackage::NotFound => {
                                         "was not found in the package registry"
                                     }
+                                    UnavailablePackage::InvalidMetadata(_) => {
+                                        "was found, but the metadata could not be parsed"
+                                    }
+                                    UnavailablePackage::InvalidStructure(_) => {
+                                        "was found, but has an invalid format"
+                                    }
                                 })
                         } else {
                             None
@@ -407,6 +445,17 @@ impl<
                 }
             };
 
+            prefetcher
+                .prefetch_batches(
+                    &next,
+                    &version,
+                    term_intersection.unwrap_positive(),
+                    &request_sink,
+                    self.index,
+                    &self.selector,
+                )
+                .await?;
+
             self.on_progress(&next, &version);
 
             if added_dependencies
@@ -421,18 +470,10 @@ impl<
                     .await?
                 {
                     Dependencies::Unavailable(reason) => {
-                        let message = {
-                            if matches!(package, PubGrubPackage::Root(_)) {
-                                // Including front-matter for the root package is redundant
-                                reason.clone()
-                            } else {
-                                format!("its dependencies are unusable because {reason}")
-                            }
-                        };
                         state.add_incompatibility(Incompatibility::unavailable(
                             package.clone(),
                             version.clone(),
-                            message,
+                            reason.clone(),
                         ));
                         continue;
                     }
@@ -482,19 +523,27 @@ impl<
         match package {
             PubGrubPackage::Root(_) => {}
             PubGrubPackage::Python(_) => {}
-            PubGrubPackage::Package(package_name, _extra, None) => {
+            PubGrubPackage::Package(name, _extra, None) => {
+                // Verify that the package is allowed under the hash-checking policy.
+                if !self.hasher.allows_package(name) {
+                    return Err(ResolveError::UnhashedPackage(name.clone()));
+                }
+
                 // Emit a request to fetch the metadata for this package.
-                if self.index.packages.register(package_name.clone()) {
-                    priorities.add(package_name.clone());
-                    request_sink
-                        .send(Request::Package(package_name.clone()))
-                        .await?;
+                if self.index.packages.register(name.clone()) {
+                    priorities.add(name.clone());
+                    request_sink.send(Request::Package(name.clone())).await?;
                 }
             }
-            PubGrubPackage::Package(package_name, _extra, Some(url)) => {
+            PubGrubPackage::Package(name, _extra, Some(url)) => {
+                // Verify that the package is allowed under the hash-checking policy.
+                if !self.hasher.allows_url(url) {
+                    return Err(ResolveError::UnhashedPackage(name.clone()));
+                }
+
                 // Emit a request to fetch the metadata for this distribution.
-                let dist = Dist::from_url(package_name.clone(), url.clone())?;
-                if self.index.distributions.register(dist.package_id()) {
+                let dist = Dist::from_url(name.clone(), url.clone())?;
+                if self.index.distributions.register(dist.version_id()) {
                     priorities.add(dist.name().clone());
                     request_sink.send(Request::Dist(dist)).await?;
                 }
@@ -592,12 +641,44 @@ impl<
                 }
 
                 let dist = PubGrubDistribution::from_url(package_name, url);
-                let metadata = self
+                let response = self
                     .index
                     .distributions
-                    .wait(&dist.package_id())
+                    .wait(&dist.version_id())
                     .await
                     .ok_or(ResolveError::Unregistered)?;
+
+                // If we failed to fetch the metadata for a URL, we can't proceed.
+                let metadata = match &*response {
+                    MetadataResponse::Found(archive) => &archive.metadata,
+                    MetadataResponse::Offline => {
+                        self.unavailable_packages
+                            .insert(package_name.clone(), UnavailablePackage::Offline);
+                        return Ok(None);
+                    }
+                    MetadataResponse::InvalidMetadata(err) => {
+                        self.unavailable_packages.insert(
+                            package_name.clone(),
+                            UnavailablePackage::InvalidMetadata(err.to_string()),
+                        );
+                        return Ok(None);
+                    }
+                    MetadataResponse::InconsistentMetadata(err) => {
+                        self.unavailable_packages.insert(
+                            package_name.clone(),
+                            UnavailablePackage::InvalidMetadata(err.to_string()),
+                        );
+                        return Ok(None);
+                    }
+                    MetadataResponse::InvalidStructure(err) => {
+                        self.unavailable_packages.insert(
+                            package_name.clone(),
+                            UnavailablePackage::InvalidStructure(err.to_string()),
+                        );
+                        return Ok(None);
+                    }
+                };
+
                 let version = &metadata.version;
 
                 // The version is incompatible with the requirement.
@@ -632,23 +713,22 @@ impl<
                     .ok_or(ResolveError::Unregistered)?;
                 self.visited.insert(package_name.clone());
 
-                let empty_version_map = VersionMap::default();
-                let version_map = match *versions_response {
-                    VersionsResponse::Found(ref version_map) => version_map,
+                let version_maps = match *versions_response {
+                    VersionsResponse::Found(ref version_maps) => version_maps.as_slice(),
                     VersionsResponse::NoIndex => {
                         self.unavailable_packages
                             .insert(package_name.clone(), UnavailablePackage::NoIndex);
-                        &empty_version_map
+                        &[]
                     }
                     VersionsResponse::Offline => {
                         self.unavailable_packages
                             .insert(package_name.clone(), UnavailablePackage::Offline);
-                        &empty_version_map
+                        &[]
                     }
                     VersionsResponse::NotFound => {
                         self.unavailable_packages
                             .insert(package_name.clone(), UnavailablePackage::NotFound);
-                        &empty_version_map
+                        &[]
                     }
                 };
 
@@ -664,7 +744,7 @@ impl<
                 let Some(candidate) = self.selector.select(
                     package_name,
                     range,
-                    version_map,
+                    version_maps,
                     &self.preferences,
                     self.installed_packages,
                     &self.exclusions,
@@ -714,8 +794,7 @@ impl<
                 let version = candidate.version().clone();
 
                 // Emit a request to fetch the metadata for this version.
-
-                if self.index.distributions.register(candidate.package_id()) {
+                if self.index.distributions.register(candidate.version_id()) {
                     let request = match dist.for_resolution() {
                         ResolvedDistRef::Installable(dist) => Request::Dist(dist.clone()),
                         ResolvedDistRef::Installed(dist) => Request::Installed(dist.clone()),
@@ -799,13 +878,13 @@ impl<
                             Some(url) => PubGrubDistribution::from_url(package_name, url),
                             None => PubGrubDistribution::from_registry(package_name, version),
                         };
-                        let package_id = dist.package_id();
+                        let version_id = dist.version_id();
 
                         // Wait for the metadata to be available.
                         self.index
                             .distributions
-                            .wait(&package_id)
-                            .instrument(info_span!("distributions_wait", %package_id))
+                            .wait(&version_id)
+                            .instrument(info_span!("distributions_wait", %version_id))
                             .await
                             .ok_or(ResolveError::Unregistered)?;
                     }
@@ -850,7 +929,7 @@ impl<
                     Some(url) => PubGrubDistribution::from_url(package_name, url),
                     None => PubGrubDistribution::from_registry(package_name, version),
                 };
-                let package_id = dist.package_id();
+                let version_id = dist.version_id();
 
                 // If the package does not exist in the registry or locally, we cannot fetch its dependencies
                 if self.unavailable_packages.get(package_name).is_some()
@@ -869,14 +948,67 @@ impl<
                 }
 
                 // Wait for the metadata to be available.
-                let metadata = self
+                let response = self
                     .index
                     .distributions
-                    .wait(&package_id)
-                    .instrument(info_span!("distributions_wait", %package_id))
+                    .wait(&version_id)
+                    .instrument(info_span!("distributions_wait", %version_id))
                     .await
                     .ok_or(ResolveError::Unregistered)?;
 
+                let metadata = match &*response {
+                    MetadataResponse::Found(archive) => &archive.metadata,
+                    MetadataResponse::Offline => {
+                        self.incomplete_packages
+                            .entry(package_name.clone())
+                            .or_default()
+                            .insert(version.clone(), IncompletePackage::Offline);
+                        return Ok(Dependencies::Unavailable(
+                            "network connectivity is disabled, but the metadata wasn't found in the cache"
+                                .to_string(),
+                        ));
+                    }
+                    MetadataResponse::InvalidMetadata(err) => {
+                        warn!("Unable to extract metadata for {package_name}: {err}");
+                        self.incomplete_packages
+                            .entry(package_name.clone())
+                            .or_default()
+                            .insert(
+                                version.clone(),
+                                IncompletePackage::InvalidMetadata(err.to_string()),
+                            );
+                        return Ok(Dependencies::Unavailable(
+                            "the package metadata could not be parsed".to_string(),
+                        ));
+                    }
+                    MetadataResponse::InconsistentMetadata(err) => {
+                        warn!("Unable to extract metadata for {package_name}: {err}");
+                        self.incomplete_packages
+                            .entry(package_name.clone())
+                            .or_default()
+                            .insert(
+                                version.clone(),
+                                IncompletePackage::InconsistentMetadata(err.to_string()),
+                            );
+                        return Ok(Dependencies::Unavailable(
+                            "the package metadata was inconsistent".to_string(),
+                        ));
+                    }
+                    MetadataResponse::InvalidStructure(err) => {
+                        warn!("Unable to extract metadata for {package_name}: {err}");
+                        self.incomplete_packages
+                            .entry(package_name.clone())
+                            .or_default()
+                            .insert(
+                                version.clone(),
+                                IncompletePackage::InvalidStructure(err.to_string()),
+                            );
+                        return Ok(Dependencies::Unavailable(
+                            "the package has an invalid format".to_string(),
+                        ));
+                    }
+                };
+
                 let mut constraints = PubGrubDependencies::from_requirements(
                     &metadata.requires_dist,
                     &self.constraints,
@@ -926,23 +1058,42 @@ impl<
                 }
                 Some(Response::Installed { dist, metadata }) => {
                     trace!("Received installed distribution metadata for: {dist}");
-                    self.index.distributions.done(dist.package_id(), metadata);
+                    self.index.distributions.done(
+                        dist.version_id(),
+                        MetadataResponse::Found(ArchiveMetadata::from(metadata)),
+                    );
                 }
                 Some(Response::Dist {
                     dist: Dist::Built(dist),
                     metadata,
                 }) => {
                     trace!("Received built distribution metadata for: {dist}");
-                    self.index.distributions.done(dist.package_id(), metadata);
+                    match &metadata {
+                        MetadataResponse::InvalidMetadata(err) => {
+                            warn!("Unable to extract metadata for {dist}: {err}");
+                        }
+                        MetadataResponse::InvalidStructure(err) => {
+                            warn!("Unable to extract metadata for {dist}: {err}");
+                        }
+                        _ => {}
+                    }
+                    self.index.distributions.done(dist.version_id(), metadata);
                 }
                 Some(Response::Dist {
-                    dist: Dist::Source(distribution),
+                    dist: Dist::Source(dist),
                     metadata,
                 }) => {
-                    trace!("Received source distribution metadata for: {distribution}");
-                    self.index
-                        .distributions
-                        .done(distribution.package_id(), metadata);
+                    trace!("Received source distribution metadata for: {dist}");
+                    match &metadata {
+                        MetadataResponse::InvalidMetadata(err) => {
+                            warn!("Unable to extract metadata for {dist}: {err}");
+                        }
+                        MetadataResponse::InvalidStructure(err) => {
+                            warn!("Unable to extract metadata for {dist}: {err}");
+                        }
+                        _ => {}
+                    }
+                    self.index.distributions.done(dist.version_id(), metadata);
                 }
                 None => {}
             }
@@ -1047,7 +1198,7 @@ impl<
                 };
 
                 // Emit a request to fetch the metadata for this version.
-                if self.index.distributions.register(candidate.package_id()) {
+                if self.index.distributions.register(candidate.version_id()) {
                     let dist = dist.for_resolution().to_owned();
 
                     let response = match dist {
@@ -1150,7 +1301,10 @@ enum Response {
     /// The returned metadata for a package hosted on a registry.
     Package(PackageName, VersionsResponse),
     /// The returned metadata for a distribution.
-    Dist { dist: Dist, metadata: Metadata23 },
+    Dist {
+        dist: Dist,
+        metadata: MetadataResponse,
+    },
     /// The returned metadata for an already-installed distribution.
     Installed {
         dist: InstalledDist,
diff --git a/crates/uv-resolver/src/resolver/provider.rs b/crates/uv-resolver/src/resolver/provider.rs
index 266f7fc1e..3479620ac 100644
--- a/crates/uv-resolver/src/resolver/provider.rs
+++ b/crates/uv-resolver/src/resolver/provider.rs
@@ -5,24 +5,26 @@ use chrono::{DateTime, Utc};
 
 use distribution_types::{Dist, IndexLocations};
 use platform_tags::Tags;
-use pypi_types::Metadata23;
-use uv_client::{FlatIndex, RegistryClient};
-use uv_distribution::DistributionDatabase;
-use uv_normalize::PackageName;
-use uv_types::{BuildContext, NoBinary, NoBuild};
 
+use uv_client::RegistryClient;
+use uv_configuration::{NoBinary, NoBuild};
+use uv_distribution::{ArchiveMetadata, DistributionDatabase};
+use uv_normalize::PackageName;
+use uv_types::{BuildContext, HashStrategy};
+
+use crate::flat_index::FlatIndex;
 use crate::python_requirement::PythonRequirement;
 use crate::version_map::VersionMap;
 use crate::yanks::AllowedYanks;
 
 pub type PackageVersionsResult = Result<VersionsResponse, uv_client::Error>;
-pub type WheelMetadataResult = Result<Metadata23, uv_distribution::Error>;
+pub type WheelMetadataResult = Result<MetadataResponse, uv_distribution::Error>;
 
 /// The response when requesting versions for a package
 #[derive(Debug)]
 pub enum VersionsResponse {
     /// The package was found in the registry with the included versions
-    Found(VersionMap),
+    Found(Vec<VersionMap>),
     /// The package was not found in the registry
     NotFound,
     /// The package was not found in the local registry
@@ -31,6 +33,20 @@ pub enum VersionsResponse {
     Offline,
 }
 
+#[derive(Debug)]
+pub enum MetadataResponse {
+    /// The wheel metadata was found and parsed successfully.
+    Found(ArchiveMetadata),
+    /// The wheel metadata was found, but could not be parsed.
+    InvalidMetadata(Box<pypi_types::MetadataError>),
+    /// The wheel metadata was found, but the metadata was inconsistent.
+    InconsistentMetadata(Box<uv_distribution::Error>),
+    /// The wheel has an invalid structure.
+    InvalidStructure(Box<install_wheel_rs::Error>),
+    /// The wheel metadata was not found in the cache and the network is not available.
+    Offline,
+}
+
 pub trait ResolverProvider: Send + Sync {
     /// Get the version map for a package.
     fn get_package_versions<'io>(
@@ -67,6 +83,7 @@ pub struct DefaultResolverProvider<'a, Context: BuildContext + Send + Sync> {
     tags: Tags,
     python_requirement: PythonRequirement,
     allowed_yanks: AllowedYanks,
+    hasher: HashStrategy,
     exclude_newer: Option<DateTime<Utc>>,
     no_binary: NoBinary,
     no_build: NoBuild,
@@ -82,6 +99,7 @@ impl<'a, Context: BuildContext + Send + Sync> DefaultResolverProvider<'a, Contex
         tags: &'a Tags,
         python_requirement: PythonRequirement,
         allowed_yanks: AllowedYanks,
+        hasher: &'a HashStrategy,
         exclude_newer: Option<DateTime<Utc>>,
         no_binary: &'a NoBinary,
         no_build: &'a NoBuild,
@@ -93,6 +111,7 @@ impl<'a, Context: BuildContext + Send + Sync> DefaultResolverProvider<'a, Contex
             tags: tags.clone(),
             python_requirement,
             allowed_yanks,
+            hasher: hasher.clone(),
             exclude_newer,
             no_binary: no_binary.clone(),
             no_build: no_build.clone(),
@@ -108,34 +127,38 @@ impl<'a, Context: BuildContext + Send + Sync> ResolverProvider
         &'io self,
         package_name: &'io PackageName,
     ) -> PackageVersionsResult {
-        let result = self.client.simple(package_name).await;
-
-        // If the "Simple API" request was successful, convert to `VersionMap` on the Tokio
-        // threadpool, since it can be slow.
-        match result {
-            Ok((index, metadata)) => Ok(VersionsResponse::Found(VersionMap::from_metadata(
-                metadata,
-                package_name,
-                &index,
-                &self.tags,
-                &self.python_requirement,
-                &self.allowed_yanks,
-                self.exclude_newer.as_ref(),
-                self.flat_index.get(package_name).cloned(),
-                &self.no_binary,
-                &self.no_build,
-            ))),
+        match self.client.simple(package_name).await {
+            Ok(results) => Ok(VersionsResponse::Found(
+                results
+                    .into_iter()
+                    .map(|(index, metadata)| {
+                        VersionMap::from_metadata(
+                            metadata,
+                            package_name,
+                            &index,
+                            &self.tags,
+                            &self.python_requirement,
+                            &self.allowed_yanks,
+                            &self.hasher,
+                            self.exclude_newer.as_ref(),
+                            self.flat_index.get(package_name).cloned(),
+                            &self.no_binary,
+                            &self.no_build,
+                        )
+                    })
+                    .collect(),
+            )),
             Err(err) => match err.into_kind() {
                 uv_client::ErrorKind::PackageNotFound(_) => {
                     if let Some(flat_index) = self.flat_index.get(package_name).cloned() {
-                        Ok(VersionsResponse::Found(VersionMap::from(flat_index)))
+                        Ok(VersionsResponse::Found(vec![VersionMap::from(flat_index)]))
                     } else {
                         Ok(VersionsResponse::NotFound)
                     }
                 }
                 uv_client::ErrorKind::NoIndex(_) => {
                     if let Some(flat_index) = self.flat_index.get(package_name).cloned() {
-                        Ok(VersionsResponse::Found(VersionMap::from(flat_index)))
+                        Ok(VersionsResponse::Found(vec![VersionMap::from(flat_index)]))
                     } else if self.flat_index.offline() {
                         Ok(VersionsResponse::Offline)
                     } else {
@@ -144,7 +167,7 @@ impl<'a, Context: BuildContext + Send + Sync> ResolverProvider
                 }
                 uv_client::ErrorKind::Offline(_) => {
                     if let Some(flat_index) = self.flat_index.get(package_name).cloned() {
-                        Ok(VersionsResponse::Found(VersionMap::from(flat_index)))
+                        Ok(VersionsResponse::Found(vec![VersionMap::from(flat_index)]))
                     } else {
                         Ok(VersionsResponse::Offline)
                     }
@@ -154,8 +177,40 @@ impl<'a, Context: BuildContext + Send + Sync> ResolverProvider
         }
     }
 
+    /// Fetch the metadata for a distribution, building it if necessary.
     async fn get_or_build_wheel_metadata<'io>(&'io self, dist: &'io Dist) -> WheelMetadataResult {
-        self.fetcher.get_or_build_wheel_metadata(dist).await
+        match self
+            .fetcher
+            .get_or_build_wheel_metadata(dist, self.hasher.get(dist))
+            .await
+        {
+            Ok(metadata) => Ok(MetadataResponse::Found(metadata)),
+            Err(err) => match err {
+                uv_distribution::Error::Client(client) => match client.into_kind() {
+                    uv_client::ErrorKind::Offline(_) => Ok(MetadataResponse::Offline),
+                    uv_client::ErrorKind::MetadataParseError(_, _, err) => {
+                        Ok(MetadataResponse::InvalidMetadata(err))
+                    }
+                    uv_client::ErrorKind::DistInfo(err) => {
+                        Ok(MetadataResponse::InvalidStructure(Box::new(err)))
+                    }
+                    kind => Err(uv_client::Error::from(kind).into()),
+                },
+                uv_distribution::Error::VersionMismatch { .. } => {
+                    Ok(MetadataResponse::InconsistentMetadata(Box::new(err)))
+                }
+                uv_distribution::Error::NameMismatch { .. } => {
+                    Ok(MetadataResponse::InconsistentMetadata(Box::new(err)))
+                }
+                uv_distribution::Error::Metadata(err) => {
+                    Ok(MetadataResponse::InvalidMetadata(Box::new(err)))
+                }
+                uv_distribution::Error::DistInfo(err) => {
+                    Ok(MetadataResponse::InvalidStructure(Box::new(err)))
+                }
+                err => Err(err),
+            },
+        }
     }
 
     fn index_locations(&self) -> &IndexLocations {
diff --git a/crates/uv-resolver/src/version_map.rs b/crates/uv-resolver/src/version_map.rs
index b3045e600..91e41c4e2 100644
--- a/crates/uv-resolver/src/version_map.rs
+++ b/crates/uv-resolver/src/version_map.rs
@@ -2,23 +2,25 @@ use std::collections::btree_map::{BTreeMap, Entry};
 use std::sync::OnceLock;
 
 use chrono::{DateTime, Utc};
+use rkyv::{de::deserializers::SharedDeserializeMap, Deserialize};
 use rustc_hash::FxHashSet;
-use tracing::{instrument, warn};
+use tracing::instrument;
 
 use distribution_filename::{DistFilename, WheelFilename};
 use distribution_types::{
-    Dist, IncompatibleSource, IncompatibleWheel, IndexUrl, PrioritizedDist,
+    Dist, Hash, IncompatibleSource, IncompatibleWheel, IndexUrl, PrioritizedDist,
     SourceDistCompatibility, WheelCompatibility,
 };
 use pep440_rs::{Version, VersionSpecifiers};
-use platform_tags::Tags;
-use pypi_types::{Hashes, Yanked};
-use rkyv::{de::deserializers::SharedDeserializeMap, Deserialize};
-use uv_client::{FlatDistributions, OwnedArchive, SimpleMetadata, VersionFiles};
+use platform_tags::{TagCompatibility, Tags};
+use pypi_types::{HashDigest, Yanked};
+use uv_client::{OwnedArchive, SimpleMetadata, VersionFiles};
+use uv_configuration::{NoBinary, NoBuild};
 use uv_normalize::PackageName;
-use uv_types::{NoBinary, NoBuild};
+use uv_types::HashStrategy;
 use uv_warnings::warn_user_once;
 
+use crate::flat_index::FlatDistributions;
 use crate::{python_requirement::PythonRequirement, yanks::AllowedYanks};
 
 /// A map from versions to distributions.
@@ -46,6 +48,7 @@ impl VersionMap {
         tags: &Tags,
         python_requirement: &PythonRequirement,
         allowed_yanks: &AllowedYanks,
+        hasher: &HashStrategy,
         exclude_newer: Option<&DateTime<Utc>>,
         flat_index: Option<FlatDistributions>,
         no_binary: &NoBinary,
@@ -109,6 +112,7 @@ impl VersionMap {
             .allowed_versions(package_name)
             .cloned()
             .unwrap_or_default();
+        let required_hashes = hasher.get_package(package_name).digests().to_vec();
         Self {
             inner: VersionMapInner::Lazy(VersionMapLazy {
                 map,
@@ -120,6 +124,7 @@ impl VersionMap {
                 python_requirement: python_requirement.clone(),
                 exclude_newer: exclude_newer.copied(),
                 allowed_yanks,
+                required_hashes,
             }),
         }
     }
@@ -152,7 +157,9 @@ impl VersionMap {
     /// which can be used to lazily request a [`CompatibleDist`]. This is
     /// useful in cases where one can skip materializing a full distribution
     /// for each version.
-    pub(crate) fn iter(&self) -> impl DoubleEndedIterator<Item = (&Version, VersionMapDistHandle)> {
+    pub(crate) fn iter(
+        &self,
+    ) -> impl DoubleEndedIterator<Item = (&Version, VersionMapDistHandle)> + ExactSizeIterator {
         match self.inner {
             VersionMapInner::Eager(ref map) => {
                 either::Either::Left(map.iter().map(|(version, dist)| {
@@ -174,16 +181,10 @@ impl VersionMap {
     }
 
     /// Return the [`Hashes`] for the given version, if any.
-    pub(crate) fn hashes(&self, version: &Version) -> Vec<Hashes> {
+    pub(crate) fn hashes(&self, version: &Version) -> Option<Vec<HashDigest>> {
         match self.inner {
-            VersionMapInner::Eager(ref map) => map
-                .get(version)
-                .map(|file| file.hashes().to_vec())
-                .unwrap_or_default(),
-            VersionMapInner::Lazy(ref lazy) => lazy
-                .get(version)
-                .map(|file| file.hashes().to_vec())
-                .unwrap_or_default(),
+            VersionMapInner::Eager(ref map) => map.get(version).map(|file| file.hashes().to_vec()),
+            VersionMapInner::Lazy(ref lazy) => lazy.get(version).map(|file| file.hashes().to_vec()),
         }
     }
 
@@ -306,6 +307,8 @@ struct VersionMapLazy {
     exclude_newer: Option<DateTime<Utc>>,
     /// Which yanked versions are allowed
     allowed_yanks: FxHashSet<Version>,
+    /// The hashes of allowed distributions.
+    required_hashes: Vec<HashDigest>,
 }
 
 impl VersionMapLazy {
@@ -382,13 +385,14 @@ impl VersionMapLazy {
                 let version = filename.version().clone();
                 let requires_python = file.requires_python.clone();
                 let yanked = file.yanked.clone();
-                let hash = file.hashes.clone();
+                let hashes = file.hashes.clone();
                 match filename {
                     DistFilename::WheelFilename(filename) => {
                         let compatibility = self.wheel_compatibility(
                             &filename,
                             &version,
                             requires_python,
+                            &hashes,
                             yanked,
                             excluded,
                             upload_time,
@@ -398,12 +402,13 @@ impl VersionMapLazy {
                             file,
                             self.index.clone(),
                         );
-                        priority_dist.insert_built(dist, Some(hash), compatibility);
+                        priority_dist.insert_built(dist, hashes, compatibility);
                     }
                     DistFilename::SourceDistFilename(filename) => {
                         let compatibility = self.source_dist_compatibility(
                             &version,
                             requires_python,
+                            &hashes,
                             yanked,
                             excluded,
                             upload_time,
@@ -413,7 +418,7 @@ impl VersionMapLazy {
                             file,
                             self.index.clone(),
                         );
-                        priority_dist.insert_source(dist, Some(hash), compatibility);
+                        priority_dist.insert_source(dist, hashes, compatibility);
                     }
                 }
             }
@@ -426,10 +431,12 @@ impl VersionMapLazy {
         simple.dist.get_or_init(get_or_init).as_ref()
     }
 
+    #[allow(clippy::too_many_arguments)]
     fn source_dist_compatibility(
         &self,
         version: &Version,
         requires_python: Option<VersionSpecifiers>,
+        hashes: &[HashDigest],
         yanked: Option<Yanked>,
         excluded: bool,
         upload_time: Option<i64>,
@@ -466,14 +473,32 @@ impl VersionMapLazy {
             }
         }
 
-        SourceDistCompatibility::Compatible
+        // Check if hashes line up. If hashes aren't required, they're considered matching.
+        let hash = if self.required_hashes.is_empty() {
+            Hash::Matched
+        } else {
+            if hashes.is_empty() {
+                Hash::Missing
+            } else if hashes
+                .iter()
+                .any(|hash| self.required_hashes.contains(hash))
+            {
+                Hash::Matched
+            } else {
+                Hash::Mismatched
+            }
+        };
+
+        SourceDistCompatibility::Compatible(hash)
     }
 
+    #[allow(clippy::too_many_arguments)]
     fn wheel_compatibility(
         &self,
         filename: &WheelFilename,
         version: &Version,
         requires_python: Option<VersionSpecifiers>,
+        hashes: &[HashDigest],
         yanked: Option<Yanked>,
         excluded: bool,
         upload_time: Option<i64>,
@@ -504,8 +529,31 @@ impl VersionMapLazy {
             }
         }
 
-        // Determine a compatibility for the wheel based on tags
-        WheelCompatibility::from(filename.compatibility(&self.tags))
+        // Determine a compatibility for the wheel based on tags.
+        let priority = match filename.compatibility(&self.tags) {
+            TagCompatibility::Incompatible(tag) => {
+                return WheelCompatibility::Incompatible(IncompatibleWheel::Tag(tag))
+            }
+            TagCompatibility::Compatible(priority) => priority,
+        };
+
+        // Check if hashes line up. If hashes aren't required, they're considered matching.
+        let hash = if self.required_hashes.is_empty() {
+            Hash::Matched
+        } else {
+            if hashes.is_empty() {
+                Hash::Missing
+            } else if hashes
+                .iter()
+                .any(|hash| self.required_hashes.contains(hash))
+            {
+                Hash::Matched
+            } else {
+                Hash::Mismatched
+            }
+        };
+
+        WheelCompatibility::Compatible(hash, priority)
     }
 }
 
diff --git a/crates/uv-resolver/tests/resolver.rs b/crates/uv-resolver/tests/resolver.rs
index 3fc94d237..9a4951e1b 100644
--- a/crates/uv-resolver/tests/resolver.rs
+++ b/crates/uv-resolver/tests/resolver.rs
@@ -14,15 +14,15 @@ use distribution_types::{IndexLocations, Resolution, SourceDist};
 use pep508_rs::{MarkerEnvironment, Requirement, StringVersion};
 use platform_tags::{Arch, Os, Platform, Tags};
 use uv_cache::Cache;
-use uv_client::{FlatIndex, RegistryClientBuilder};
+use uv_client::RegistryClientBuilder;
+use uv_configuration::{BuildKind, Constraints, NoBinary, NoBuild, Overrides, SetupPyStrategy};
 use uv_interpreter::{find_default_python, Interpreter, PythonEnvironment};
 use uv_resolver::{
-    DisplayResolutionGraph, Exclusions, InMemoryIndex, Manifest, Options, OptionsBuilder,
-    PreReleaseMode, Preference, ResolutionGraph, ResolutionMode, Resolver,
+    DisplayResolutionGraph, Exclusions, FlatIndex, InMemoryIndex, Manifest, Options,
+    OptionsBuilder, PreReleaseMode, Preference, ResolutionGraph, ResolutionMode, Resolver,
 };
 use uv_types::{
-    BuildContext, BuildIsolation, BuildKind, Constraints, EmptyInstalledPackages, NoBinary,
-    NoBuild, Overrides, SetupPyStrategy, SourceBuildTrait,
+    BuildContext, BuildIsolation, EmptyInstalledPackages, HashStrategy, SourceBuildTrait,
 };
 
 // Exclude any packages uploaded after this date.
@@ -125,6 +125,7 @@ async fn resolve(
         find_default_python(&Cache::temp().unwrap()).expect("Expected a python to be installed");
     let interpreter = Interpreter::artificial(real_interpreter.platform().clone(), markers.clone());
     let build_context = DummyContext::new(Cache::temp()?, interpreter.clone());
+    let hashes = HashStrategy::None;
     let installed_packages = EmptyInstalledPackages;
     let resolver = Resolver::new(
         manifest,
@@ -135,6 +136,7 @@ async fn resolve(
         &client,
         &flat_index,
         &index,
+        &hashes,
         &build_context,
         &installed_packages,
     )?;
diff --git a/crates/uv-toolchain/Cargo.toml b/crates/uv-toolchain/Cargo.toml
new file mode 100644
index 000000000..59bab562e
--- /dev/null
+++ b/crates/uv-toolchain/Cargo.toml
@@ -0,0 +1,33 @@
+[package]
+name = "uv-toolchain"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+homepage.workspace = true
+documentation.workspace = true
+repository.workspace = true
+authors.workspace = true
+license.workspace = true
+
+[dependencies]
+uv-client = { workspace = true }
+uv-extract = { workspace = true }
+uv-fs = { workspace = true }
+pep440_rs = { workspace = true }
+pep508_rs = { workspace = true }
+
+anyhow = { workspace = true }
+fs-err = { workspace = true }
+futures = { workspace = true }
+once_cell = {workspace = true}
+reqwest = { workspace = true }
+reqwest-middleware = { workspace = true }
+tempfile = { workspace = true }
+thiserror = { workspace = true }
+tokio = { workspace = true }
+tokio-util = { workspace = true, features = ["compat"] }
+tracing = { workspace = true }
+url = { workspace = true }
+
+[lints]
+workspace = true
diff --git a/scripts/bootstrap/fetch-version-metadata.py b/crates/uv-toolchain/fetch-version-metadata.py
similarity index 69%
rename from scripts/bootstrap/fetch-version-metadata.py
rename to crates/uv-toolchain/fetch-version-metadata.py
index d3d5e4b25..2dc4b3d9a 100755
--- a/scripts/bootstrap/fetch-version-metadata.py
+++ b/crates/uv-toolchain/fetch-version-metadata.py
@@ -2,15 +2,11 @@
 """
 Fetch Python version metadata.
 
-Generates the bootstrap `versions.json` file.
-
-Installation:
-
-    pip install requests==2.31.0
+Generates the `python-version-metadata.json` file.
 
 Usage:
 
-    scripts/bootstrap/fetch-versions
+    python fetch-version-metadata.py
 
 Acknowledgements:
 
@@ -22,25 +18,19 @@ import argparse
 import hashlib
 import json
 import logging
-import os
 import re
-import sys
+import urllib.error
+import urllib.request
 from itertools import chain
 from pathlib import Path
 from urllib.parse import unquote
 
-try:
-    import requests
-except ImportError:
-    print("ERROR: requests is required; install with `pip install requests==2.31.0`")
-    sys.exit(1)
-
 SELF_DIR = Path(__file__).parent
 RELEASE_URL = "https://api.github.com/repos/indygreg/python-build-standalone/releases"
 HEADERS = {
     "X-GitHub-Api-Version": "2022-11-28",
 }
-VERSIONS_FILE = SELF_DIR / "versions.json"
+VERSIONS_FILE = SELF_DIR / "python-version-metadata.json"
 FLAVOR_PREFERENCES = [
     "shared-pgo",
     "shared-noopt",
@@ -63,6 +53,8 @@ SPECIAL_TRIPLES = {
     "linux64": "x86_64-unknown-linux-gnu",
     "windows-amd64": "x86_64-pc-windows",
     "windows-x86": "i686-pc-windows",
+    "windows-amd64-shared": "x86_64-pc-windows",
+    "windows-x86-shared": "i686-pc-windows",
     "linux64-musl": "x86_64-unknown-linux-musl",
 }
 
@@ -88,8 +80,14 @@ _suffix_re = re.compile(
     )
 )
 
-# to match the output of the `arch` command
-ARCH_MAP = {"aarch64": "arm64"}
+# Normalized mappings to match the Rust types
+ARCH_MAP = {
+    "ppc64": "powerpc64",
+    "ppc64le": "powerpc64le",
+    "i686": "x86",
+    "i386": "x86",
+}
+OS_MAP = {"darwin": "macos"}
 
 
 def parse_filename(filename):
@@ -114,10 +112,8 @@ def normalize_triple(triple):
     triple = SPECIAL_TRIPLES.get(triple, triple)
     pieces = triple.split("-")
     try:
-        arch = pieces[0]
-        # Normalize
-        arch = ARCH_MAP.get(arch, arch)
-        platform = pieces[2]
+        arch = normalize_arch(pieces[0])
+        operating_system = normalize_os(pieces[2])
         if pieces[2] == "linux":
             # On linux, the triple has four segments, the last one is the libc
             libc = pieces[3]
@@ -126,14 +122,27 @@ def normalize_triple(triple):
     except IndexError:
         logging.debug("Skipping %r: unknown triple", triple)
         return
-    return "%s-%s-%s" % (arch, platform, libc)
+    return "%s-%s-%s" % (arch, operating_system, libc)
 
 
-def read_sha256(session, url):
-    resp = session.get(url + ".sha256")
-    if not resp.ok:
+def normalize_arch(arch):
+    arch = ARCH_MAP.get(arch, arch)
+    pieces = arch.split("_")
+    # Strip `_vN` from `x86_64`
+    return "_".join(pieces[:2])
+
+
+def normalize_os(os):
+    return OS_MAP.get(os, os)
+
+
+def read_sha256(url):
+    try:
+        resp = urllib.request.urlopen(url + ".sha256")
+    except urllib.error.HTTPError:
         return None
-    return resp.text.strip()
+    assert resp.status == 200
+    return resp.read().decode().strip()
 
 
 def sha256(path):
@@ -150,8 +159,8 @@ def sha256(path):
     return h.hexdigest()
 
 
-def _sort_key(info):
-    triple, flavor, url = info
+def _sort_by_flavor_preference(info):
+    _triple, flavor, _url = info
     try:
         pref = FLAVOR_PREFERENCES.index(flavor)
     except ValueError:
@@ -159,32 +168,22 @@ def _sort_key(info):
     return pref
 
 
-def get_session() -> requests.Session:
-    session = requests.Session()
-    session.headers = HEADERS.copy()
-
-    token = os.environ.get("GITHUB_TOKEN")
-    if token:
-        session.headers["Authorization"] = "Bearer " + token
-    else:
-        logging.warning(
-            "An authentication token was not found at `GITHUB_TOKEN`, rate limits may be encountered.",
-        )
-
-    return session
+def _sort_by_interpreter_and_version(info):
+    interpreter, version_tuple, _ = info
+    return (interpreter, version_tuple)
 
 
-def find(args):
+def find():
     """
     Find available Python versions and write metadata to a file.
     """
     results = {}
-    session = get_session()
 
+    # Collect all available Python downloads
     for page in range(1, 100):
         logging.debug("Reading release page %s...", page)
-        resp = session.get("%s?page=%d" % (RELEASE_URL, page))
-        rows = resp.json()
+        resp = urllib.request.urlopen("%s?page=%d" % (RELEASE_URL, page))
+        rows = json.loads(resp.read())
         if not rows:
             break
         for row in rows:
@@ -204,34 +203,47 @@ def find(args):
                     continue
                 results.setdefault(py_ver, []).append((triple, flavor, url))
 
-    cpython_results = {}
+    # Collapse CPython variants to a single URL flavor per triple
+    cpython_results: dict[tuple[int, int, int], dict[tuple[str, str, str], str]] = {}
     for py_ver, choices in results.items():
-        choices.sort(key=_sort_key)
         urls = {}
-        for triple, flavor, url in choices:
+        for triple, flavor, url in sorted(choices, key=_sort_by_flavor_preference):
             triple = tuple(triple.split("-"))
+            # Skip existing triples, preferring the first flavor
             if triple in urls:
                 continue
             urls[triple] = url
         cpython_results[tuple(map(int, py_ver.split(".")))] = urls
 
+    # Collect variants across interpreter kinds
+    # TODO(zanieb): Note we only support CPython downloads at this time
+    #               but this will include PyPy chain in the future.
     final_results = {}
     for interpreter, py_ver, choices in sorted(
         chain(
             (("cpython",) + x for x in cpython_results.items()),
         ),
-        key=lambda x: x[:2],
+        key=_sort_by_interpreter_and_version,
+        # Reverse the ordering so newer versions are first
         reverse=True,
     ):
-        for (arch, platform, libc), url in sorted(choices.items()):
-            key = "%s-%s.%s.%s-%s-%s-%s" % (interpreter, *py_ver, platform, arch, libc)
+        # Sort by the remaining information for determinism
+        # This groups download metadata in triple component order
+        for (arch, operating_system, libc), url in sorted(choices.items()):
+            key = "%s-%s.%s.%s-%s-%s-%s" % (
+                interpreter,
+                *py_ver,
+                operating_system,
+                arch,
+                libc,
+            )
             logging.info("Found %s", key)
-            sha256 = read_sha256(session, url)
+            sha256 = read_sha256(url)
 
             final_results[key] = {
                 "name": interpreter,
                 "arch": arch,
-                "os": platform,
+                "os": operating_system,
                 "libc": libc,
                 "major": py_ver[0],
                 "minor": py_ver[1],
@@ -273,7 +285,7 @@ def main():
         datefmt="%Y-%m-%d %H:%M:%S",
     )
 
-    find(args)
+    find()
 
 
 if __name__ == "__main__":
diff --git a/scripts/bootstrap/versions.json b/crates/uv-toolchain/python-version-metadata.json
similarity index 63%
rename from scripts/bootstrap/versions.json
rename to crates/uv-toolchain/python-version-metadata.json
index c95201415..3306ca69d 100644
--- a/scripts/bootstrap/versions.json
+++ b/crates/uv-toolchain/python-version-metadata.json
@@ -1,18 +1,106 @@
 {
-  "cpython-3.12.1-darwin-arm64-none": {
+  "cpython-3.12.2-linux-aarch64-gnu": {
     "name": "cpython",
-    "arch": "arm64",
-    "os": "darwin",
+    "arch": "aarch64",
+    "os": "linux",
+    "libc": "gnu",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-aarch64-unknown-linux-gnu-debug-full.tar.zst",
+    "sha256": "469a7fd0d0a09936c5db41b5ac83bb29d5bfeb721aa483ac92f3f7ac4d311097"
+  },
+  "cpython-3.12.2-macos-aarch64-none": {
+    "name": "cpython",
+    "arch": "aarch64",
+    "os": "macos",
     "libc": "none",
     "major": 3,
     "minor": 12,
-    "patch": 1,
-    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240107/cpython-3.12.1%2B20240107-aarch64-apple-darwin-pgo%2Blto-full.tar.zst",
-    "sha256": "61e51e3490537b800fcefad718157cf775de41044e95aa538b63ab599f66f3a9"
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-aarch64-apple-darwin-pgo%2Blto-full.tar.zst",
+    "sha256": "2afcc8b25c55793f6ceb0bef2e547e101f53c9e25a0fe0332320e5381a1f0fdb"
   },
-  "cpython-3.12.1-linux-arm64-gnu": {
+  "cpython-3.12.2-linux-powerpc64le-gnu": {
     "name": "cpython",
-    "arch": "arm64",
+    "arch": "powerpc64le",
+    "os": "linux",
+    "libc": "gnu",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-ppc64le-unknown-linux-gnu-debug-full.tar.zst",
+    "sha256": "1d70476fb9013cc93e787417680b34629b510e6e2145cf48bb2f0fe887f7a4d8"
+  },
+  "cpython-3.12.2-linux-s390x-gnu": {
+    "name": "cpython",
+    "arch": "s390x",
+    "os": "linux",
+    "libc": "gnu",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-s390x-unknown-linux-gnu-debug-full.tar.zst",
+    "sha256": "f40b88607928b5ee34ff87c1d574c8493a1604d7a40474e1b03731184186f419"
+  },
+  "cpython-3.12.2-windows-x86-none": {
+    "name": "cpython",
+    "arch": "x86",
+    "os": "windows",
+    "libc": "none",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-i686-pc-windows-msvc-shared-pgo-full.tar.zst",
+    "sha256": "ee985ae6a6a98f4d5bd19fd8c59f45235911d19b64e1dbd026261b8103f15db5"
+  },
+  "cpython-3.12.2-linux-x86_64-gnu": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "linux",
+    "libc": "gnu",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-x86_64-unknown-linux-gnu-debug-full.tar.zst",
+    "sha256": "15b61ed9d33b35ad014a13a68a55d8ea5ba7fb70945644747f4e53c659f2fed6"
+  },
+  "cpython-3.12.2-linux-x86_64-musl": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "linux",
+    "libc": "musl",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-x86_64-unknown-linux-musl-lto-full.tar.zst",
+    "sha256": "7ec1dc7ad8223ec5839a57d232fd3cf730987f7b0f88b2c4f15ee935bcabbaa9"
+  },
+  "cpython-3.12.2-macos-x86_64-none": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "macos",
+    "libc": "none",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-x86_64-apple-darwin-pgo%2Blto-full.tar.zst",
+    "sha256": "b4b4d19c36e86803aa0b4410395f5568bef28d82666efba926e44dbe06345a12"
+  },
+  "cpython-3.12.2-windows-x86_64-none": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "windows",
+    "libc": "none",
+    "major": 3,
+    "minor": 12,
+    "patch": 2,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240224/cpython-3.12.2%2B20240224-x86_64-pc-windows-msvc-shared-pgo-full.tar.zst",
+    "sha256": "a1daf5e8ceb23d34ea29b16b5123b06694810fe7acc5c8384426435c63bf731e"
+  },
+  "cpython-3.12.1-linux-aarch64-gnu": {
+    "name": "cpython",
+    "arch": "aarch64",
     "os": "linux",
     "libc": "gnu",
     "major": 3,
@@ -21,20 +109,20 @@
     "url": "https://github.com/indygreg/python-build-standalone/releases/download/20240107/cpython-3.12.1%2B20240107-aarch64-unknown-linux-gnu-debug-full.tar.zst",
     "sha256": "9009da24f436611d0bf086b8ea62aaed1c27104af5b770ddcfc92b60db06da8c"
   },
-  "cpython-3.12.1-windows-i686-none": {
+  "cpython-3.12.1-macos-aarch64-none": {
     "name": "cpython",
-    "arch": "i686",
-    "os": "windows",
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+    "os": "macos",
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@@ -98,86 +197,9 @@
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@@ -186,20 +208,20 @@
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@@ -219,16 +241,16 @@
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-    "os": "windows",
+    "arch": "aarch64",
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@@ -417,6 +472,17 @@
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@@ -428,86 +494,9 @@
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@@ -516,20 +505,20 @@
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+    "arch": "aarch64",
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@@ -549,16 +538,16 @@
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-    "os": "darwin",
+    "arch": "x86",
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@@ -582,6 +571,17 @@
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@@ -593,86 +593,9 @@
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@@ -681,31 +604,20 @@
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@@ -2496,9 +1704,9 @@
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@@ -2793,9 +1858,20 @@
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@@ -2804,9 +1880,9 @@
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@@ -4333,9 +2815,9 @@
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@@ -4630,9 +2969,20 @@
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@@ -4696,20 +3046,9 @@
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@@ -4718,9 +3057,20 @@
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-    "sha256": null
-  },
   "cpython-3.7.4-linux-x86_64-gnu": {
     "name": "cpython",
     "arch": "x86_64",
@@ -6599,6 +4916,17 @@
     "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-linux64-musl-20190817T0227.tar.zst",
     "sha256": null
   },
+  "cpython-3.7.4-macos-x86_64-none": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "macos",
+    "libc": "none",
+    "major": 3,
+    "minor": 7,
+    "patch": 4,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-macos-20190817T0220.tar.zst",
+    "sha256": null
+  },
   "cpython-3.7.4-windows-x86_64-none": {
     "name": "cpython",
     "arch": "x86_64",
@@ -6610,9 +4938,9 @@
     "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-windows-amd64-20190817T0227.tar.zst",
     "sha256": null
   },
-  "cpython-3.7.3-windows-i686-none": {
+  "cpython-3.7.3-windows-x86-none": {
     "name": "cpython",
-    "arch": "i686",
+    "arch": "x86",
     "os": "windows",
     "libc": "none",
     "major": 3,
@@ -6621,17 +4949,6 @@
     "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-windows-x86-20190709T0348.tar.zst",
     "sha256": null
   },
-  "cpython-3.7.3-darwin-x86_64-none": {
-    "name": "cpython",
-    "arch": "x86_64",
-    "os": "darwin",
-    "libc": "none",
-    "major": 3,
-    "minor": 7,
-    "patch": 3,
-    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-macos-20190618T0523.tar.zst",
-    "sha256": null
-  },
   "cpython-3.7.3-linux-x86_64-gnu": {
     "name": "cpython",
     "arch": "x86_64",
@@ -6654,6 +4971,17 @@
     "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-linux64-musl-20190618T0400.tar.zst",
     "sha256": null
   },
+  "cpython-3.7.3-macos-x86_64-none": {
+    "name": "cpython",
+    "arch": "x86_64",
+    "os": "macos",
+    "libc": "none",
+    "major": 3,
+    "minor": 7,
+    "patch": 3,
+    "url": "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-macos-20190618T0523.tar.zst",
+    "sha256": null
+  },
   "cpython-3.7.3-windows-x86_64-none": {
     "name": "cpython",
     "arch": "x86_64",
diff --git a/crates/uv-toolchain/src/downloads.rs b/crates/uv-toolchain/src/downloads.rs
new file mode 100644
index 000000000..ae1adfe59
--- /dev/null
+++ b/crates/uv-toolchain/src/downloads.rs
@@ -0,0 +1,438 @@
+use std::fmt::{self, Display};
+use std::io;
+use std::path::{Path, PathBuf};
+use std::str::FromStr;
+
+use crate::PythonVersion;
+use thiserror::Error;
+use uv_client::BetterReqwestError;
+
+use futures::TryStreamExt;
+
+use tokio_util::compat::FuturesAsyncReadCompatExt;
+use tracing::debug;
+use url::Url;
+use uv_fs::Simplified;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("operating system not supported: {0}")]
+    OsNotSupported(String),
+    #[error("architecture not supported: {0}")]
+    ArchNotSupported(String),
+    #[error("libc type could not be detected")]
+    LibcNotDetected(),
+    #[error("invalid python version: {0}")]
+    InvalidPythonVersion(String),
+    #[error("download failed")]
+    NetworkError(#[from] BetterReqwestError),
+    #[error("download failed")]
+    NetworkMiddlewareError(#[source] anyhow::Error),
+    #[error(transparent)]
+    ExtractError(#[from] uv_extract::Error),
+    #[error("invalid download url")]
+    InvalidUrl(#[from] url::ParseError),
+    #[error("failed to create download directory")]
+    DownloadDirError(#[source] io::Error),
+    #[error("failed to copy to: {0}", to.user_display())]
+    CopyError {
+        to: PathBuf,
+        #[source]
+        err: io::Error,
+    },
+    #[error("failed to read toolchain directory: {0}", dir.user_display())]
+    ReadError {
+        dir: PathBuf,
+        #[source]
+        err: io::Error,
+    },
+}
+
+#[derive(Debug, PartialEq)]
+pub struct PythonDownload {
+    key: &'static str,
+    implementation: ImplementationName,
+    arch: Arch,
+    os: Os,
+    libc: Libc,
+    major: u8,
+    minor: u8,
+    patch: u8,
+    url: &'static str,
+    sha256: Option<&'static str>,
+}
+
+#[derive(Debug)]
+pub struct PythonDownloadRequest {
+    version: Option<PythonVersion>,
+    implementation: Option<ImplementationName>,
+    arch: Option<Arch>,
+    os: Option<Os>,
+    libc: Option<Libc>,
+}
+
+impl PythonDownloadRequest {
+    pub fn new(
+        version: Option<PythonVersion>,
+        implementation: Option<ImplementationName>,
+        arch: Option<Arch>,
+        os: Option<Os>,
+        libc: Option<Libc>,
+    ) -> Self {
+        Self {
+            version,
+            implementation,
+            arch,
+            os,
+            libc,
+        }
+    }
+
+    #[must_use]
+    pub fn with_implementation(mut self, implementation: ImplementationName) -> Self {
+        self.implementation = Some(implementation);
+        self
+    }
+
+    #[must_use]
+    pub fn with_arch(mut self, arch: Arch) -> Self {
+        self.arch = Some(arch);
+        self
+    }
+
+    #[must_use]
+    pub fn with_os(mut self, os: Os) -> Self {
+        self.os = Some(os);
+        self
+    }
+
+    #[must_use]
+    pub fn with_libc(mut self, libc: Libc) -> Self {
+        self.libc = Some(libc);
+        self
+    }
+
+    pub fn fill(mut self) -> Result<Self, Error> {
+        if self.implementation.is_none() {
+            self.implementation = Some(ImplementationName::Cpython);
+        }
+        if self.arch.is_none() {
+            self.arch = Some(Arch::from_env()?);
+        }
+        if self.os.is_none() {
+            self.os = Some(Os::from_env()?);
+        }
+        if self.libc.is_none() {
+            self.libc = Some(Libc::from_env()?);
+        }
+        Ok(self)
+    }
+}
+
+impl FromStr for PythonDownloadRequest {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        // TOOD(zanieb): Implement parsing of additional request parts
+        let version = PythonVersion::from_str(s).map_err(Error::InvalidPythonVersion)?;
+        Ok(Self::new(Some(version), None, None, None, None))
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Libc {
+    Gnu,
+    Musl,
+    None,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum ImplementationName {
+    Cpython,
+}
+#[derive(Debug, PartialEq)]
+pub struct Platform {
+    os: Os,
+    arch: Arch,
+    libc: Libc,
+}
+
+include!("python_versions.inc");
+
+pub enum DownloadResult {
+    AlreadyAvailable(PathBuf),
+    Fetched(PathBuf),
+}
+
+impl PythonDownload {
+    /// Return the [`PythonDownload`] corresponding to the key, if it exists.
+    pub fn from_key(key: &str) -> Option<&PythonDownload> {
+        PYTHON_DOWNLOADS.iter().find(|&value| value.key == key)
+    }
+
+    pub fn from_request(request: &PythonDownloadRequest) -> Option<&'static PythonDownload> {
+        for download in PYTHON_DOWNLOADS {
+            if let Some(arch) = &request.arch {
+                if download.arch != *arch {
+                    continue;
+                }
+            }
+            if let Some(os) = &request.os {
+                if download.os != *os {
+                    continue;
+                }
+            }
+            if let Some(implementation) = &request.implementation {
+                if download.implementation != *implementation {
+                    continue;
+                }
+            }
+            if let Some(version) = &request.version {
+                if download.major != version.major() {
+                    continue;
+                }
+                if download.minor != version.minor() {
+                    continue;
+                }
+                if let Some(patch) = version.patch() {
+                    if download.patch != patch {
+                        continue;
+                    }
+                }
+            }
+            return Some(download);
+        }
+        None
+    }
+
+    pub fn url(&self) -> &str {
+        self.url
+    }
+
+    pub fn sha256(&self) -> Option<&str> {
+        self.sha256
+    }
+
+    /// Download and extract
+    pub async fn fetch(
+        &self,
+        client: &uv_client::BaseClient,
+        path: &Path,
+    ) -> Result<DownloadResult, Error> {
+        let url = Url::parse(self.url)?;
+        let path = path.join(self.key).clone();
+
+        // If it already exists, return it
+        if path.is_dir() {
+            return Ok(DownloadResult::AlreadyAvailable(path));
+        }
+
+        let filename = url.path_segments().unwrap().last().unwrap();
+        let response = client.get(url.clone()).send().await?;
+
+        // Ensure the request was successful.
+        response.error_for_status_ref()?;
+
+        // Download and extract into a temporary directory.
+        let temp_dir = tempfile::tempdir().map_err(Error::DownloadDirError)?;
+
+        debug!(
+            "Downloading {url} to temporary location {}",
+            temp_dir.path().display()
+        );
+        let reader = response
+            .bytes_stream()
+            .map_err(|err| std::io::Error::new(std::io::ErrorKind::Other, err))
+            .into_async_read();
+
+        debug!("Extracting {filename}");
+        uv_extract::stream::archive(reader.compat(), filename, temp_dir.path()).await?;
+
+        // Extract the top-level directory.
+        let extracted = match uv_extract::strip_component(temp_dir.path()) {
+            Ok(top_level) => top_level,
+            Err(uv_extract::Error::NonSingularArchive(_)) => temp_dir.into_path(),
+            Err(err) => return Err(err.into()),
+        };
+
+        // Persist it to the target
+        debug!("Moving {} to {}", extracted.display(), path.user_display());
+        fs_err::tokio::rename(extracted, &path)
+            .await
+            .map_err(|err| Error::CopyError {
+                to: path.clone(),
+                err,
+            })?;
+
+        Ok(DownloadResult::Fetched(path))
+    }
+
+    pub fn python_version(&self) -> PythonVersion {
+        PythonVersion::from_str(&format!("{}.{}.{}", self.major, self.minor, self.patch))
+            .expect("Python downloads should always have valid versions")
+    }
+}
+
+impl Platform {
+    pub fn new(os: Os, arch: Arch, libc: Libc) -> Self {
+        Self { os, arch, libc }
+    }
+    pub fn from_env() -> Result<Self, Error> {
+        Ok(Self::new(
+            Os::from_env()?,
+            Arch::from_env()?,
+            Libc::from_env()?,
+        ))
+    }
+}
+
+/// All supported operating systems.
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub enum Os {
+    Windows,
+    Linux,
+    Macos,
+    FreeBsd,
+    NetBsd,
+    OpenBsd,
+    Dragonfly,
+    Illumos,
+    Haiku,
+}
+
+impl fmt::Display for Os {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Self::Windows => write!(f, "Windows"),
+            Self::Macos => write!(f, "MacOS"),
+            Self::FreeBsd => write!(f, "FreeBSD"),
+            Self::NetBsd => write!(f, "NetBSD"),
+            Self::Linux => write!(f, "Linux"),
+            Self::OpenBsd => write!(f, "OpenBSD"),
+            Self::Dragonfly => write!(f, "DragonFly"),
+            Self::Illumos => write!(f, "Illumos"),
+            Self::Haiku => write!(f, "Haiku"),
+        }
+    }
+}
+
+impl Os {
+    pub(crate) fn from_env() -> Result<Self, Error> {
+        Self::from_str(std::env::consts::OS)
+    }
+}
+
+impl FromStr for Os {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "windows" => Ok(Self::Windows),
+            "linux" => Ok(Self::Linux),
+            "macos" => Ok(Self::Macos),
+            "freebsd" => Ok(Self::FreeBsd),
+            "netbsd" => Ok(Self::NetBsd),
+            "openbsd" => Ok(Self::OpenBsd),
+            "dragonfly" => Ok(Self::Dragonfly),
+            "illumos" => Ok(Self::Illumos),
+            "haiku" => Ok(Self::Haiku),
+            _ => Err(Error::OsNotSupported(s.to_string())),
+        }
+    }
+}
+
+/// All supported CPU architectures
+#[derive(Debug, Clone, Copy, Eq, PartialEq)]
+pub enum Arch {
+    Aarch64,
+    Armv6L,
+    Armv7L,
+    Powerpc64Le,
+    Powerpc64,
+    X86,
+    X86_64,
+    S390X,
+}
+
+impl fmt::Display for Arch {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Self::Aarch64 => write!(f, "aarch64"),
+            Self::Armv6L => write!(f, "armv6l"),
+            Self::Armv7L => write!(f, "armv7l"),
+            Self::Powerpc64Le => write!(f, "ppc64le"),
+            Self::Powerpc64 => write!(f, "ppc64"),
+            Self::X86 => write!(f, "i686"),
+            Self::X86_64 => write!(f, "x86_64"),
+            Self::S390X => write!(f, "s390x"),
+        }
+    }
+}
+
+impl FromStr for Arch {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "aarch64" | "arm64" => Ok(Self::Aarch64),
+            "armv6l" => Ok(Self::Armv6L),
+            "armv7l" => Ok(Self::Armv7L),
+            "powerpc64le" | "ppc64le" => Ok(Self::Powerpc64Le),
+            "powerpc64" | "ppc64" => Ok(Self::Powerpc64),
+            "x86" | "i686" | "i386" => Ok(Self::X86),
+            "x86_64" | "amd64" => Ok(Self::X86_64),
+            "s390x" => Ok(Self::S390X),
+            _ => Err(Error::ArchNotSupported(s.to_string())),
+        }
+    }
+}
+
+impl Arch {
+    pub(crate) fn from_env() -> Result<Self, Error> {
+        Self::from_str(std::env::consts::ARCH)
+    }
+}
+
+impl Libc {
+    pub(crate) fn from_env() -> Result<Self, Error> {
+        // TODO(zanieb): Perform this lookup
+        match std::env::consts::OS {
+            "linux" => Ok(Libc::Gnu),
+            "windows" | "macos" => Ok(Libc::None),
+            _ => Err(Error::LibcNotDetected()),
+        }
+    }
+}
+
+impl fmt::Display for Libc {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Libc::Gnu => f.write_str("gnu"),
+            Libc::None => f.write_str("none"),
+            Libc::Musl => f.write_str("musl"),
+        }
+    }
+}
+
+impl From<reqwest::Error> for Error {
+    fn from(error: reqwest::Error) -> Self {
+        Self::NetworkError(BetterReqwestError::from(error))
+    }
+}
+
+impl From<reqwest_middleware::Error> for Error {
+    fn from(error: reqwest_middleware::Error) -> Self {
+        match error {
+            reqwest_middleware::Error::Middleware(error) => Self::NetworkMiddlewareError(error),
+            reqwest_middleware::Error::Reqwest(error) => {
+                Self::NetworkError(BetterReqwestError::from(error))
+            }
+        }
+    }
+}
+
+impl Display for PythonDownload {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(self.key)
+    }
+}
diff --git a/crates/uv-toolchain/src/find.rs b/crates/uv-toolchain/src/find.rs
new file mode 100644
index 000000000..69022bae6
--- /dev/null
+++ b/crates/uv-toolchain/src/find.rs
@@ -0,0 +1,110 @@
+use std::collections::BTreeSet;
+use std::ffi::OsStr;
+use std::path::{Path, PathBuf};
+
+use crate::downloads::{Arch, Error, Libc, Os};
+use crate::python_version::PythonVersion;
+
+use once_cell::sync::Lazy;
+
+/// The directory where Python toolchains we install are stored.
+pub static TOOLCHAIN_DIRECTORY: Lazy<PathBuf> = Lazy::new(|| {
+    std::env::var_os("UV_BOOTSTRAP_DIR").map_or(
+        Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap())
+            .parent()
+            .expect("CARGO_MANIFEST_DIR should be nested in workspace")
+            .parent()
+            .expect("CARGO_MANIFEST_DIR should be doubly nested in workspace")
+            .join("bin"),
+        PathBuf::from,
+    )
+});
+
+/// An installed Python toolchain.
+#[derive(Debug, Clone)]
+pub struct Toolchain {
+    /// The path to the top-level directory of the installed toolchain.
+    path: PathBuf,
+}
+
+impl Toolchain {
+    pub fn executable(&self) -> PathBuf {
+        if cfg!(windows) {
+            self.path.join("install").join("python.exe")
+        } else if cfg!(unix) {
+            self.path.join("install").join("bin").join("python3")
+        } else {
+            unimplemented!("Only Windows and Unix systems are supported.")
+        }
+    }
+}
+
+/// Return the toolchains that satisfy the given Python version on this platform.
+///
+/// ## Errors
+///
+/// - The platform metadata cannot be read
+/// - A directory in the toolchain directory cannot be read
+pub fn toolchains_for_version(version: &PythonVersion) -> Result<Vec<Toolchain>, Error> {
+    let platform_key = platform_key_from_env()?;
+
+    // TODO(zanieb): Consider returning an iterator instead of a `Vec`
+    //               Note we need to collect paths regardless for sorting by version.
+
+    let toolchain_dirs = match fs_err::read_dir(TOOLCHAIN_DIRECTORY.to_path_buf()) {
+        Ok(toolchain_dirs) => {
+            // Collect sorted directory paths; `read_dir` is not stable across platforms
+            let directories: BTreeSet<_> = toolchain_dirs
+                .filter_map(|read_dir| match read_dir {
+                    Ok(entry) => match entry.file_type() {
+                        Ok(file_type) => file_type.is_dir().then_some(Ok(entry.path())),
+                        Err(err) => Some(Err(err)),
+                    },
+                    Err(err) => Some(Err(err)),
+                })
+                .collect::<Result<_, std::io::Error>>()
+                .map_err(|err| Error::ReadError {
+                    dir: TOOLCHAIN_DIRECTORY.to_path_buf(),
+                    err,
+                })?;
+            directories
+        }
+        Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
+            return Ok(Vec::new());
+        }
+        Err(err) => {
+            return Err(Error::ReadError {
+                dir: TOOLCHAIN_DIRECTORY.to_path_buf(),
+                err,
+            })
+        }
+    };
+
+    Ok(toolchain_dirs
+        .into_iter()
+        // Sort "newer" versions of Python first
+        .rev()
+        .filter_map(|path| {
+            if path
+                .file_name()
+                .map(OsStr::to_string_lossy)
+                .is_some_and(|filename| {
+                    filename.starts_with(&format!("cpython-{version}"))
+                        && filename.ends_with(&platform_key)
+                })
+            {
+                Some(Toolchain { path })
+            } else {
+                None
+            }
+        })
+        .collect::<Vec<_>>())
+}
+
+/// Generate a platform portion of a key from the environment.
+fn platform_key_from_env() -> Result<String, Error> {
+    let os = Os::from_env()?;
+    let arch = Arch::from_env()?;
+    let libc = Libc::from_env()?;
+    Ok(format!("{os}-{arch}-{libc}").to_lowercase())
+}
diff --git a/crates/uv-toolchain/src/lib.rs b/crates/uv-toolchain/src/lib.rs
new file mode 100644
index 000000000..116571ff7
--- /dev/null
+++ b/crates/uv-toolchain/src/lib.rs
@@ -0,0 +1,9 @@
+pub use crate::downloads::{
+    DownloadResult, Error, Platform, PythonDownload, PythonDownloadRequest,
+};
+pub use crate::find::{toolchains_for_version, Toolchain, TOOLCHAIN_DIRECTORY};
+pub use crate::python_version::PythonVersion;
+
+mod downloads;
+mod find;
+mod python_version;
diff --git a/crates/uv-interpreter/src/python_version.rs b/crates/uv-toolchain/src/python_version.rs
similarity index 92%
rename from crates/uv-interpreter/src/python_version.rs
rename to crates/uv-toolchain/src/python_version.rs
index dffb46fbf..ba3d36385 100644
--- a/crates/uv-interpreter/src/python_version.rs
+++ b/crates/uv-toolchain/src/python_version.rs
@@ -5,8 +5,6 @@ use std::str::FromStr;
 use pep440_rs::Version;
 use pep508_rs::{MarkerEnvironment, StringVersion};
 
-use crate::Interpreter;
-
 #[derive(Debug, Clone)]
 pub struct PythonVersion(StringVersion);
 
@@ -142,18 +140,6 @@ impl PythonVersion {
         Self::from_str(format!("{}.{}", self.major(), self.minor()).as_str())
             .expect("dropping a patch should always be valid")
     }
-
-    /// Check if this Python version is satisfied by the given interpreter.
-    ///
-    /// If a patch version is present, we will require an exact match.
-    /// Otherwise, just the major and minor version numbers need to match.
-    pub fn is_satisfied_by(&self, interpreter: &Interpreter) -> bool {
-        if self.patch().is_some() {
-            self.version() == interpreter.python_version()
-        } else {
-            (self.major(), self.minor()) == interpreter.python_tuple()
-        }
-    }
 }
 
 #[cfg(test)]
diff --git a/crates/uv-toolchain/src/python_versions.inc b/crates/uv-toolchain/src/python_versions.inc
new file mode 100644
index 000000000..56c2aeac0
--- /dev/null
+++ b/crates/uv-toolchain/src/python_versions.inc
@@ -0,0 +1,5467 @@
+// DO NOT EDIT
+//
+// Generated with `crates/uv-toolchain/template-version-metadata.py`
+// From template at `crates/uv-toolchain/src/python_versions.inc.mustache`
+
+pub(crate) const PYTHON_DOWNLOADS: &[PythonDownload] = &[
+    PythonDownload {
+        key: "cpython-3.12.2-linux-aarch64-gnu",
+        major: 3,
+        minor: 12,
+        patch: 2,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::Aarch64,
+        os: Os::Linux,
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+        key: "cpython-3.8.2-linux-x86_64-gnu",
+        major: 3,
+        minor: 8,
+        patch: 2,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200418/cpython-3.8.2-x86_64-unknown-linux-gnu-debug-20200418T2305.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.8.2-macos-x86_64-none",
+        major: 3,
+        minor: 8,
+        patch: 2,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200418/cpython-3.8.2-x86_64-apple-darwin-pgo-20200418T2238.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.8.2-windows-x86_64-none",
+        major: 3,
+        minor: 8,
+        patch: 2,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200418/cpython-3.8.2-x86_64-pc-windows-msvc-shared-pgo-20200418T2315.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.9-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 9,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200822/cpython-3.7.9-i686-pc-windows-msvc-shared-pgo-20200823T0159.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.9-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 9,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200822/cpython-3.7.9-x86_64-unknown-linux-gnu-debug-20200823T0036.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.9-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 9,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200822/cpython-3.7.9-x86_64-unknown-linux-musl-debug-20200823T0036.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.9-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 9,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200823/cpython-3.7.9-x86_64-apple-darwin-pgo-20200823T2228.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.9-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 9,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200822/cpython-3.7.9-x86_64-pc-windows-msvc-shared-pgo-20200823T0118.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.7-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 7,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200517/cpython-3.7.7-i686-pc-windows-msvc-shared-pgo-20200517T2153.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.7-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 7,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200517/cpython-3.7.7-x86_64-unknown-linux-gnu-debug-20200518T0040.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.7-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 7,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200517/cpython-3.7.7-x86_64-unknown-linux-musl-debug-20200518T0040.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.7-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 7,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200530/cpython-3.7.7-x86_64-apple-darwin-pgo-20200530T1845.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.7-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 7,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200517/cpython-3.7.7-x86_64-pc-windows-msvc-shared-pgo-20200517T2128.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.6-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 6,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200216/cpython-3.7.6-windows-x86-shared-pgo-20200217T0110.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.6-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 6,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200216/cpython-3.7.6-linux64-20200216T2303.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.6-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 6,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200217/cpython-3.7.6-linux64-musl-20200218T0557.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.6-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 6,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200216/cpython-3.7.6-macos-20200216T2344.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.6-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 6,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20200216/cpython-3.7.6-windows-amd64-shared-pgo-20200217T0022.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.5-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 5,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20191025/cpython-3.7.5-windows-x86-20191025T0549.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.5-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 5,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20191025/cpython-3.7.5-linux64-20191025T0506.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.5-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 5,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20191025/cpython-3.7.5-linux64-musl-20191026T0603.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.5-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 5,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20191025/cpython-3.7.5-macos-20191026T0535.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.5-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 5,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20191025/cpython-3.7.5-windows-amd64-20191025T0540.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.4-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 4,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-windows-x86-20190817T0235.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.4-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 4,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-linux64-20190817T0224.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.4-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 4,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-linux64-musl-20190817T0227.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.4-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 4,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-macos-20190817T0220.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.4-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 4,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190816/cpython-3.7.4-windows-amd64-20190817T0227.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.3-windows-x86-none",
+        major: 3,
+        minor: 7,
+        patch: 3,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-windows-x86-20190709T0348.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.3-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 3,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-linux64-20190618T0324.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.3-linux-x86_64-musl",
+        major: 3,
+        minor: 7,
+        patch: 3,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Musl,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-linux64-musl-20190618T0400.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.3-macos-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 3,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Macos,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-macos-20190618T0523.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.3-windows-x86_64-none",
+        major: 3,
+        minor: 7,
+        patch: 3,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Windows,
+        libc: Libc::None,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20190617/cpython-3.7.3-windows-amd64-20190618T0516.tar.zst",
+        sha256: None
+    },
+    PythonDownload {
+        key: "cpython-3.7.1-linux-x86_64-gnu",
+        major: 3,
+        minor: 7,
+        patch: 1,
+        implementation: ImplementationName::Cpython,
+        arch: Arch::X86_64,
+        os: Os::Linux,
+        libc: Libc::Gnu,
+        url: "https://github.com/indygreg/python-build-standalone/releases/download/20181218/cpython-3.7.1-linux64-20181218T1905.tar.zst",
+        sha256: None
+    },
+];
diff --git a/crates/uv-toolchain/src/python_versions.inc.mustache b/crates/uv-toolchain/src/python_versions.inc.mustache
new file mode 100644
index 000000000..9c81e82b3
--- /dev/null
+++ b/crates/uv-toolchain/src/python_versions.inc.mustache
@@ -0,0 +1,26 @@
+// DO NOT EDIT
+//
+// Generated with `{{generated_with}}`
+// From template at `{{generated_from}}`
+
+pub(crate) const PYTHON_DOWNLOADS: &[PythonDownload] = &[
+    {{#versions}}
+    PythonDownload {
+        key: "{{key}}",
+        major: {{value.major}},
+        minor: {{value.minor}},
+        patch: {{value.patch}},
+        implementation: ImplementationName::{{value.name}},
+        arch: Arch::{{value.arch}},
+        os: Os::{{value.os}},
+        libc: Libc::{{value.libc}},
+        url: "{{value.url}}",
+        {{#value.sha256}}
+        sha256: Some("{{.}}")
+        {{/value.sha256}}
+        {{^value.sha256}}
+        sha256: None
+        {{/value.sha256}}
+    },
+    {{/versions}}
+];
diff --git a/crates/uv-toolchain/template-version-metadata.py b/crates/uv-toolchain/template-version-metadata.py
new file mode 100644
index 000000000..f8d70f14d
--- /dev/null
+++ b/crates/uv-toolchain/template-version-metadata.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python3.12
+"""
+Generate static Rust code from Python version metadata.
+
+Generates the `python_versions.rs` file from the `python_versions.rs.mustache` template.
+
+Usage:
+
+    python template-version-metadata.py
+"""
+
+import sys
+import logging
+import argparse
+import json
+import subprocess
+from pathlib import Path
+
+CRATE_ROOT = Path(__file__).parent
+WORKSPACE_ROOT = CRATE_ROOT.parent.parent
+VERSION_METADATA = CRATE_ROOT / "python-version-metadata.json"
+TEMPLATE = CRATE_ROOT / "src" / "python_versions.inc.mustache"
+TARGET = TEMPLATE.with_suffix("")
+
+
+try:
+    import chevron_blue
+except ImportError:
+    print(
+        "missing requirement `chevron-blue`",
+        file=sys.stderr,
+    )
+    exit(1)
+
+
+def prepare_value(value: dict) -> dict:
+    # Convert fields from snake case to camel case for enums
+    for key in ["arch", "os", "libc", "name"]:
+        value[key] = value[key].title()
+    return value
+
+
+def main():
+    debug = logging.getLogger().getEffectiveLevel() <= logging.DEBUG
+
+    data = {}
+    data["generated_with"] = Path(__file__).relative_to(WORKSPACE_ROOT)
+    data["generated_from"] = TEMPLATE.relative_to(WORKSPACE_ROOT)
+    data["versions"] = [
+        {"key": key, "value": prepare_value(value)}
+        for key, value in json.loads(VERSION_METADATA.read_text()).items()
+    ]
+
+    # Render the template
+    logging.info(f"Rendering `{TEMPLATE.name}`...")
+    output = chevron_blue.render(
+        template=TEMPLATE.read_text(), data=data, no_escape=True, warn=debug
+    )
+
+    # Update the file
+    logging.info(f"Updating `{TARGET}`...")
+    TARGET.write_text(output)
+    subprocess.check_call(
+        ["rustfmt", str(TARGET)],
+        stderr=subprocess.STDOUT,
+        stdout=sys.stderr if debug else subprocess.DEVNULL,
+    )
+
+    logging.info("Done!")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Generates Rust code for Python version metadata.",
+    )
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="store_true",
+        help="Enable debug logging",
+    )
+    parser.add_argument(
+        "-q",
+        "--quiet",
+        action="store_true",
+        help="Disable logging",
+    )
+
+    args = parser.parse_args()
+    if args.quiet:
+        log_level = logging.CRITICAL
+    elif args.verbose:
+        log_level = logging.DEBUG
+    else:
+        log_level = logging.INFO
+
+    logging.basicConfig(level=log_level, format="%(message)s")
+
+    main()
diff --git a/crates/uv-types/Cargo.toml b/crates/uv-types/Cargo.toml
index e6210fb49..c517c0bf0 100644
--- a/crates/uv-types/Cargo.toml
+++ b/crates/uv-types/Cargo.toml
@@ -15,16 +15,22 @@ workspace = true
 [dependencies]
 distribution-types = { workspace = true }
 once-map = { workspace = true }
+pep440_rs = { workspace = true }
 pep508_rs = { workspace = true }
+pypi-types = { workspace = true }
 uv-cache = { workspace = true }
 uv-interpreter = { workspace = true }
 uv-normalize = { workspace = true }
+uv-configuration = { workspace = true }
 
 anyhow = { workspace = true }
+clap = { workspace = true, features = ["derive"], optional = true }
 itertools = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true, optional = true }
 serde_json = { workspace = true, optional = true }
+thiserror = { workspace = true }
+url = { workspace = true }
 
 [features]
 default = []
diff --git a/crates/uv-types/src/builds.rs b/crates/uv-types/src/builds.rs
new file mode 100644
index 000000000..9cc80f7e2
--- /dev/null
+++ b/crates/uv-types/src/builds.rs
@@ -0,0 +1,15 @@
+use uv_interpreter::PythonEnvironment;
+
+/// Whether to enforce build isolation when building source distributions.
+#[derive(Debug, Copy, Clone)]
+pub enum BuildIsolation<'a> {
+    Isolated,
+    Shared(&'a PythonEnvironment),
+}
+
+impl<'a> BuildIsolation<'a> {
+    /// Returns `true` if build isolation is enforced.
+    pub fn is_isolated(&self) -> bool {
+        matches!(self, Self::Isolated)
+    }
+}
diff --git a/crates/uv-types/src/hash.rs b/crates/uv-types/src/hash.rs
new file mode 100644
index 000000000..23b992b33
--- /dev/null
+++ b/crates/uv-types/src/hash.rs
@@ -0,0 +1,162 @@
+use std::str::FromStr;
+
+use rustc_hash::FxHashMap;
+use url::Url;
+
+use distribution_types::{DistributionMetadata, HashPolicy, PackageId};
+use pep508_rs::{MarkerEnvironment, RequirementsTxtRequirement, VersionOrUrl};
+use pypi_types::{HashDigest, HashError};
+use uv_normalize::PackageName;
+
+#[derive(Debug, Clone)]
+pub enum HashStrategy {
+    /// No hash policy is specified.
+    None,
+    /// Hashes should be generated (specifically, a SHA-256 hash), but not validated.
+    Generate,
+    /// Hashes should be validated against a pre-defined list of hashes. If necessary, hashes should
+    /// be generated so as to ensure that the archive is valid.
+    Validate(FxHashMap<PackageId, Vec<HashDigest>>),
+}
+
+impl HashStrategy {
+    /// Return the [`HashPolicy`] for the given distribution.
+    pub fn get<T: DistributionMetadata>(&self, distribution: &T) -> HashPolicy {
+        match self {
+            Self::None => HashPolicy::None,
+            Self::Generate => HashPolicy::Generate,
+            Self::Validate(hashes) => HashPolicy::Validate(
+                hashes
+                    .get(&distribution.package_id())
+                    .map(Vec::as_slice)
+                    .unwrap_or_default(),
+            ),
+        }
+    }
+
+    /// Return the [`HashPolicy`] for the given registry-based package.
+    pub fn get_package(&self, name: &PackageName) -> HashPolicy {
+        match self {
+            Self::None => HashPolicy::None,
+            Self::Generate => HashPolicy::Generate,
+            Self::Validate(hashes) => HashPolicy::Validate(
+                hashes
+                    .get(&PackageId::from_registry(name.clone()))
+                    .map(Vec::as_slice)
+                    .unwrap_or_default(),
+            ),
+        }
+    }
+
+    /// Return the [`HashPolicy`] for the given direct URL package.
+    pub fn get_url(&self, url: &Url) -> HashPolicy {
+        match self {
+            Self::None => HashPolicy::None,
+            Self::Generate => HashPolicy::Generate,
+            Self::Validate(hashes) => HashPolicy::Validate(
+                hashes
+                    .get(&PackageId::from_url(url))
+                    .map(Vec::as_slice)
+                    .unwrap_or_default(),
+            ),
+        }
+    }
+
+    /// Returns `true` if the given registry-based package is allowed.
+    pub fn allows_package(&self, name: &PackageName) -> bool {
+        match self {
+            Self::None => true,
+            Self::Generate => true,
+            Self::Validate(hashes) => hashes.contains_key(&PackageId::from_registry(name.clone())),
+        }
+    }
+
+    /// Returns `true` if the given direct URL package is allowed.
+    pub fn allows_url(&self, url: &Url) -> bool {
+        match self {
+            Self::None => true,
+            Self::Generate => true,
+            Self::Validate(hashes) => hashes.contains_key(&PackageId::from_url(url)),
+        }
+    }
+
+    /// Generate the required hashes from a set of [`RequirementsTxtRequirement`] entries.
+    pub fn from_requirements<'a>(
+        requirements: impl Iterator<Item = (&'a RequirementsTxtRequirement, &'a [String])>,
+        markers: &MarkerEnvironment,
+    ) -> Result<Self, HashStrategyError> {
+        let mut hashes = FxHashMap::<PackageId, Vec<HashDigest>>::default();
+
+        // For each requirement, map from name to allowed hashes. We use the last entry for each
+        // package.
+        for (requirement, digests) in requirements {
+            if !requirement.evaluate_markers(markers, &[]) {
+                continue;
+            }
+
+            // Every requirement must be either a pinned version or a direct URL.
+            let id = match &requirement {
+                RequirementsTxtRequirement::Pep508(requirement) => {
+                    match requirement.version_or_url.as_ref() {
+                        Some(VersionOrUrl::Url(url)) => {
+                            // Direct URLs are always allowed.
+                            PackageId::from_url(url)
+                        }
+                        Some(VersionOrUrl::VersionSpecifier(specifiers)) => {
+                            // Must be a single specifier.
+                            let [specifier] = specifiers.as_ref() else {
+                                return Err(HashStrategyError::UnpinnedRequirement(
+                                    requirement.to_string(),
+                                ));
+                            };
+
+                            // Must be pinned to a specific version.
+                            if *specifier.operator() != pep440_rs::Operator::Equal {
+                                return Err(HashStrategyError::UnpinnedRequirement(
+                                    requirement.to_string(),
+                                ));
+                            }
+
+                            PackageId::from_registry(requirement.name.clone())
+                        }
+                        None => {
+                            return Err(HashStrategyError::UnpinnedRequirement(
+                                requirement.to_string(),
+                            ))
+                        }
+                    }
+                }
+                RequirementsTxtRequirement::Unnamed(requirement) => {
+                    // Direct URLs are always allowed.
+                    PackageId::from_url(&requirement.url)
+                }
+            };
+
+            // Every requirement must include a hash.
+            if digests.is_empty() {
+                return Err(HashStrategyError::MissingHashes(requirement.to_string()));
+            }
+
+            // Parse the hashes.
+            let digests = digests
+                .iter()
+                .map(|digest| HashDigest::from_str(digest))
+                .collect::<Result<Vec<_>, _>>()
+                .unwrap();
+
+            hashes.insert(id, digests);
+        }
+
+        Ok(Self::Validate(hashes))
+    }
+}
+
+#[derive(thiserror::Error, Debug)]
+pub enum HashStrategyError {
+    #[error(transparent)]
+    Hash(#[from] HashError),
+    #[error("In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: {0}")]
+    UnpinnedRequirement(String),
+    #[error("In `--require-hashes` mode, all requirement must have a hash, but none were provided for: {0}")]
+    MissingHashes(String),
+}
diff --git a/crates/uv-types/src/lib.rs b/crates/uv-types/src/lib.rs
index 40a0edc0a..df0b6c4a8 100644
--- a/crates/uv-types/src/lib.rs
+++ b/crates/uv-types/src/lib.rs
@@ -1,20 +1,12 @@
 //! Fundamental types shared across `uv` crates.
-pub use build_options::*;
-pub use config_settings::*;
-pub use constraints::*;
+pub use builds::*;
 pub use downloads::*;
-pub use name_specifiers::*;
-pub use overrides::*;
-pub use package_options::*;
+pub use hash::*;
 pub use requirements::*;
 pub use traits::*;
 
-mod build_options;
-mod config_settings;
-mod constraints;
+mod builds;
 mod downloads;
-mod name_specifiers;
-mod overrides;
-mod package_options;
+mod hash;
 mod requirements;
 mod traits;
diff --git a/crates/uv-types/src/traits.rs b/crates/uv-types/src/traits.rs
index 7370d2c5c..bd5498f52 100644
--- a/crates/uv-types/src/traits.rs
+++ b/crates/uv-types/src/traits.rs
@@ -9,7 +9,8 @@ use pep508_rs::{PackageName, Requirement};
 use uv_cache::Cache;
 use uv_interpreter::{Interpreter, PythonEnvironment};
 
-use crate::{BuildIsolation, BuildKind, NoBinary, NoBuild, SetupPyStrategy};
+use crate::BuildIsolation;
+use uv_configuration::{BuildKind, NoBinary, NoBuild, SetupPyStrategy};
 
 ///  Avoids cyclic crate dependencies between resolver, installer and builder.
 ///
@@ -94,13 +95,13 @@ pub trait BuildContext: Sync {
     ///
     /// For PEP 517 builds, this calls `get_requires_for_build_wheel`.
     ///
-    /// `package_id` is for error reporting only.
+    /// `version_id` is for error reporting only.
     /// `dist` is for safety checks and may be null for editable builds.
     fn setup_build<'a>(
         &'a self,
         source: &'a Path,
         subdirectory: Option<&'a Path>,
-        package_id: &'a str,
+        version_id: &'a str,
         dist: Option<&'a SourceDist>,
         build_kind: BuildKind,
     ) -> impl Future<Output = Result<Self::SourceDistBuilder>> + Send + 'a;
diff --git a/crates/uv-version/Cargo.toml b/crates/uv-version/Cargo.toml
index 9258fe59b..47b3a0440 100644
--- a/crates/uv-version/Cargo.toml
+++ b/crates/uv-version/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uv-version"
-version = "0.1.28"
+version = "0.1.31"
 edition = { workspace = true }
 rust-version = { workspace = true }
 homepage = { workspace = true }
diff --git a/crates/uv/Cargo.toml b/crates/uv/Cargo.toml
index 1dba92d0a..b34b9757b 100644
--- a/crates/uv/Cargo.toml
+++ b/crates/uv/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uv"
-version = "0.1.28"
+version = "0.1.31"
 edition = { workspace = true }
 rust-version = { workspace = true }
 homepage = { workspace = true }
@@ -31,8 +31,10 @@ uv-interpreter = { workspace = true }
 uv-normalize = { workspace = true }
 uv-requirements = { workspace = true }
 uv-resolver = { workspace = true, features = ["clap"] }
-uv-types = { workspace = true }
+uv-types = { workspace = true, features = ["clap"] }
+uv-configuration = { workspace = true, features = ["clap"] }
 uv-virtualenv = { workspace = true }
+uv-toolchain = { workspace = true }
 uv-warnings = { workspace = true }
 
 anstream = { workspace = true }
@@ -71,19 +73,21 @@ tikv-jemallocator = { version = "0.5.4" }
 [dev-dependencies]
 assert_cmd = { version = "2.0.14" }
 assert_fs = { version = "1.1.0" }
-base64 = { version = "0.21.7" }
+base64 = { version = "0.22.0" }
 byteorder = { version = "1.5.0" }
 filetime = { version = "0.2.23" }
 indoc = { version = "2.0.4" }
 insta = { version = "1.36.1", features = ["filters", "json"] }
 predicates = { version = "3.0.4" }
 regex = { version = "1.10.3" }
-reqwest = { version = "0.11.23", features = ["blocking"], default-features = false }
+reqwest = { workspace = true, features = ["blocking"], default-features = false }
 
 [features]
-default = ["flate2/zlib-ng", "python", "pypi", "git", "maturin"]
+default = ["flate2/zlib-ng", "python", "pypi", "git", "maturin", "python-patch"]
 # Introduces a dependency on a local Python installation.
 python = []
+# Introduces a dependency on a local Python installation with specific patch versions.
+python-patch = []
 # Introduces a dependency on PyPI.
 pypi = []
 # Introduces a dependency on Git.
diff --git a/crates/uv/src/commands/pip_compile.rs b/crates/uv/src/commands/pip_compile.rs
index 28c28978c..c14cf8906 100644
--- a/crates/uv/src/commands/pip_compile.rs
+++ b/crates/uv/src/commands/pip_compile.rs
@@ -14,31 +14,31 @@ use owo_colors::OwoColorize;
 use tempfile::tempdir_in;
 use tracing::debug;
 
-use distribution_types::{IndexLocations, LocalEditable, Verbatim};
+use distribution_types::{IndexLocations, LocalEditable, LocalEditables, Verbatim};
 use platform_tags::Tags;
 use requirements_txt::EditableRequirement;
 use uv_auth::{KeyringProvider, GLOBAL_AUTH_STORE};
 use uv_cache::Cache;
-use uv_client::{
-    BaseClientBuilder, Connectivity, FlatIndex, FlatIndexClient, RegistryClientBuilder,
+use uv_client::{BaseClientBuilder, Connectivity, FlatIndexClient, RegistryClientBuilder};
+use uv_configuration::{
+    ConfigSettings, Constraints, IndexStrategy, NoBinary, NoBuild, Overrides, SetupPyStrategy,
+    Upgrade,
 };
 use uv_dispatch::BuildDispatch;
 use uv_fs::Simplified;
 use uv_installer::Downloader;
-use uv_interpreter::{find_best_python, PythonEnvironment, PythonVersion};
+use uv_interpreter::{find_best_python, PythonEnvironment};
 use uv_normalize::{ExtraName, PackageName};
 use uv_requirements::{
     upgrade::read_lockfile, ExtrasSpecification, LookaheadResolver, NamedRequirementsResolver,
     RequirementsSource, RequirementsSpecification, SourceTreeResolver,
 };
 use uv_resolver::{
-    AnnotationStyle, DependencyMode, DisplayResolutionGraph, Exclusions, InMemoryIndex, Manifest,
-    OptionsBuilder, PreReleaseMode, PythonRequirement, ResolutionMode, Resolver,
-};
-use uv_types::{
-    BuildIsolation, ConfigSettings, Constraints, EmptyInstalledPackages, InFlight, NoBinary,
-    NoBuild, Overrides, SetupPyStrategy, Upgrade,
+    AnnotationStyle, DependencyMode, DisplayResolutionGraph, Exclusions, FlatIndex, InMemoryIndex,
+    Manifest, OptionsBuilder, PreReleaseMode, PythonRequirement, ResolutionMode, Resolver,
 };
+use uv_toolchain::PythonVersion;
+use uv_types::{BuildIsolation, EmptyInstalledPackages, HashStrategy, InFlight};
 use uv_warnings::warn_user;
 
 use crate::commands::reporters::{DownloadReporter, ResolverReporter};
@@ -66,7 +66,9 @@ pub(crate) async fn pip_compile(
     include_index_url: bool,
     include_find_links: bool,
     include_marker_expression: bool,
+    include_index_annotation: bool,
     index_locations: IndexLocations,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     setup_py: SetupPyStrategy,
     config_settings: ConfigSettings,
@@ -196,6 +198,13 @@ pub(crate) async fn pip_compile(
         |python_version| Cow::Owned(python_version.markers(interpreter.markers())),
     );
 
+    // Generate, but don't enforce hashes for the requirements.
+    let hasher = if generate_hashes {
+        HashStrategy::Generate
+    } else {
+        HashStrategy::None
+    };
+
     // Incorporate any index locations from the provided sources.
     let index_locations =
         index_locations.combine(index_url, extra_index_urls, find_links, no_index);
@@ -210,6 +219,7 @@ pub(crate) async fn pip_compile(
         .native_tls(native_tls)
         .connectivity(connectivity)
         .index_urls(index_locations.index_urls())
+        .index_strategy(index_strategy)
         .keyring_provider(keyring_provider)
         .markers(&markers)
         .platform(interpreter.platform())
@@ -218,15 +228,11 @@ pub(crate) async fn pip_compile(
     // Read the lockfile, if present.
     let preferences = read_lockfile(output_file, upgrade).await?;
 
-    // Collect constraints and overrides.
-    let constraints = Constraints::from_requirements(constraints);
-    let overrides = Overrides::from_requirements(overrides);
-
     // Resolve the flat indexes from `--find-links`.
     let flat_index = {
         let client = FlatIndexClient::new(&client, &cache);
         let entries = client.fetch(index_locations.flat_index()).await?;
-        FlatIndex::from_entries(entries, &tags)
+        FlatIndex::from_entries(entries, &tags, &hasher, &no_build, &NoBinary::None)
     };
 
     // Track in-flight downloads, builds, etc., across resolutions.
@@ -265,6 +271,7 @@ pub(crate) async fn pip_compile(
         // Convert from unnamed to named requirements.
         let mut requirements = NamedRequirementsResolver::new(
             requirements,
+            &hasher,
             &build_dispatch,
             &client,
             &top_level_index,
@@ -279,6 +286,7 @@ pub(crate) async fn pip_compile(
                 SourceTreeResolver::new(
                     source_trees,
                     &extras,
+                    &hasher,
                     &build_dispatch,
                     &client,
                     &top_level_index,
@@ -292,21 +300,34 @@ pub(crate) async fn pip_compile(
         requirements
     };
 
+    // Resolve the overrides from the provided sources.
+    let overrides = NamedRequirementsResolver::new(
+        overrides,
+        &hasher,
+        &build_dispatch,
+        &client,
+        &top_level_index,
+    )
+    .with_reporter(ResolverReporter::from(printer))
+    .resolve()
+    .await?;
+
+    // Collect constraints and overrides.
+    let constraints = Constraints::from_requirements(constraints);
+    let overrides = Overrides::from_requirements(overrides);
+
     // Build the editables and add their requirements
     let editables = if editables.is_empty() {
         Vec::new()
     } else {
         let start = std::time::Instant::now();
 
-        let editables: Vec<LocalEditable> = editables
-            .into_iter()
-            .map(|editable| {
-                let EditableRequirement { url, extras, path } = editable;
-                Ok(LocalEditable { url, path, extras })
-            })
-            .collect::<Result<_>>()?;
+        let editables = LocalEditables::from_editables(editables.into_iter().map(|editable| {
+            let EditableRequirement { url, extras, path } = editable;
+            LocalEditable { url, path, extras }
+        }));
 
-        let downloader = Downloader::new(&cache, &tags, &client, &build_dispatch)
+        let downloader = Downloader::new(&cache, &tags, &hasher, &client, &build_dispatch)
             .with_reporter(DownloadReporter::from(printer).with_length(editables.len() as u64));
 
         // Build all editables.
@@ -354,6 +375,7 @@ pub(crate) async fn pip_compile(
         &constraints,
         &overrides,
         &editables,
+        &hasher,
         &build_dispatch,
         &client,
         &top_level_index,
@@ -370,7 +392,7 @@ pub(crate) async fn pip_compile(
         preferences,
         project,
         editables,
-        // Do not consider any installed packages during compilation
+        // Do not consider any installed packages during resolution.
         Exclusions::All,
         lookaheads,
     );
@@ -392,6 +414,7 @@ pub(crate) async fn pip_compile(
         &client,
         &flat_index,
         &top_level_index,
+        &hasher,
         &build_dispatch,
         &EmptyInstalledPackages,
     )?
@@ -501,6 +524,7 @@ pub(crate) async fn pip_compile(
             generate_hashes,
             include_extras,
             include_annotations,
+            include_index_annotation,
             annotation_style,
         )
     )?;
diff --git a/crates/uv/src/commands/pip_install.rs b/crates/uv/src/commands/pip_install.rs
index e54d64ff0..63ff8af1e 100644
--- a/crates/uv/src/commands/pip_install.rs
+++ b/crates/uv/src/commands/pip_install.rs
@@ -1,4 +1,5 @@
 use std::fmt::Write;
+
 use std::path::Path;
 
 use anstream::eprint;
@@ -10,8 +11,8 @@ use tempfile::tempdir_in;
 use tracing::debug;
 
 use distribution_types::{
-    DistributionMetadata, IndexLocations, InstalledMetadata, LocalDist, LocalEditable, Name,
-    Resolution,
+    DistributionMetadata, IndexLocations, InstalledMetadata, LocalDist, LocalEditable,
+    LocalEditables, Name, Resolution,
 };
 use install_wheel_rs::linker::LinkMode;
 use pep508_rs::{MarkerEnvironment, Requirement};
@@ -21,8 +22,11 @@ use requirements_txt::EditableRequirement;
 use uv_auth::{KeyringProvider, GLOBAL_AUTH_STORE};
 use uv_cache::Cache;
 use uv_client::{
-    BaseClientBuilder, Connectivity, FlatIndex, FlatIndexClient, RegistryClient,
-    RegistryClientBuilder,
+    BaseClientBuilder, Connectivity, FlatIndexClient, RegistryClient, RegistryClientBuilder,
+};
+use uv_configuration::{
+    ConfigSettings, Constraints, IndexStrategy, NoBinary, NoBuild, Overrides, Reinstall,
+    SetupPyStrategy, Upgrade,
 };
 use uv_dispatch::BuildDispatch;
 use uv_fs::Simplified;
@@ -34,13 +38,10 @@ use uv_requirements::{
     RequirementsSpecification, SourceTreeResolver,
 };
 use uv_resolver::{
-    DependencyMode, Exclusions, InMemoryIndex, Manifest, Options, OptionsBuilder, PreReleaseMode,
-    Preference, ResolutionGraph, ResolutionMode, Resolver,
-};
-use uv_types::{
-    BuildIsolation, ConfigSettings, Constraints, InFlight, NoBinary, NoBuild, Overrides, Reinstall,
-    SetupPyStrategy, Upgrade,
+    DependencyMode, Exclusions, FlatIndex, InMemoryIndex, Manifest, Options, OptionsBuilder,
+    PreReleaseMode, Preference, ResolutionGraph, ResolutionMode, Resolver,
 };
+use uv_types::{BuildIsolation, HashStrategy, InFlight};
 use uv_warnings::warn_user;
 
 use crate::commands::reporters::{DownloadReporter, InstallReporter, ResolverReporter};
@@ -61,10 +62,12 @@ pub(crate) async fn pip_install(
     dependency_mode: DependencyMode,
     upgrade: Upgrade,
     index_locations: IndexLocations,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     reinstall: Reinstall,
     link_mode: LinkMode,
     compile: bool,
+    require_hashes: bool,
     setup_py: SetupPyStrategy,
     connectivity: Connectivity,
     config_settings: &ConfigSettings,
@@ -82,6 +85,7 @@ pub(crate) async fn pip_install(
     printer: Printer,
 ) -> Result<ExitStatus> {
     let start = std::time::Instant::now();
+
     let client_builder = BaseClientBuilder::new()
         .connectivity(connectivity)
         .native_tls(native_tls)
@@ -156,6 +160,7 @@ pub(crate) async fn pip_install(
     if reinstall.is_none()
         && upgrade.is_none()
         && source_trees.is_empty()
+        && overrides.is_empty()
         && site_packages.satisfies(&requirements, &editables, &constraints)?
     {
         let num_requirements = requirements.len() + editables.len();
@@ -181,6 +186,19 @@ pub(crate) async fn pip_install(
     let tags = venv.interpreter().tags()?;
     let markers = venv.interpreter().markers();
 
+    // Collect the set of required hashes.
+    let hasher = if require_hashes {
+        HashStrategy::from_requirements(
+            requirements
+                .iter()
+                .chain(overrides.iter())
+                .map(|entry| (&entry.requirement, entry.hashes.as_slice())),
+            markers,
+        )?
+    } else {
+        HashStrategy::None
+    };
+
     // Incorporate any index locations from the provided sources.
     let index_locations =
         index_locations.combine(index_url, extra_index_urls, find_links, no_index);
@@ -195,6 +213,7 @@ pub(crate) async fn pip_install(
         .native_tls(native_tls)
         .connectivity(connectivity)
         .index_urls(index_locations.index_urls())
+        .index_strategy(index_strategy)
         .keyring_provider(keyring_provider)
         .markers(markers)
         .platform(interpreter.platform())
@@ -204,7 +223,7 @@ pub(crate) async fn pip_install(
     let flat_index = {
         let client = FlatIndexClient::new(&client, &cache);
         let entries = client.fetch(index_locations.flat_index()).await?;
-        FlatIndex::from_entries(entries, tags)
+        FlatIndex::from_entries(entries, tags, &hasher, &no_build, &no_binary)
     };
 
     // Determine whether to enable build isolation.
@@ -244,25 +263,44 @@ pub(crate) async fn pip_install(
     // Resolve the requirements from the provided sources.
     let requirements = {
         // Convert from unnamed to named requirements.
-        let mut requirements =
-            NamedRequirementsResolver::new(requirements, &resolve_dispatch, &client, &index)
-                .with_reporter(ResolverReporter::from(printer))
-                .resolve()
-                .await?;
+        let mut requirements = NamedRequirementsResolver::new(
+            requirements,
+            &hasher,
+            &resolve_dispatch,
+            &client,
+            &index,
+        )
+        .with_reporter(ResolverReporter::from(printer))
+        .resolve()
+        .await?;
 
         // Resolve any source trees into requirements.
         if !source_trees.is_empty() {
             requirements.extend(
-                SourceTreeResolver::new(source_trees, extras, &resolve_dispatch, &client, &index)
-                    .with_reporter(ResolverReporter::from(printer))
-                    .resolve()
-                    .await?,
+                SourceTreeResolver::new(
+                    source_trees,
+                    extras,
+                    &hasher,
+                    &resolve_dispatch,
+                    &client,
+                    &index,
+                )
+                .with_reporter(ResolverReporter::from(printer))
+                .resolve()
+                .await?,
             );
         }
 
         requirements
     };
 
+    // Resolve the overrides from the provided sources.
+    let overrides =
+        NamedRequirementsResolver::new(overrides, &hasher, &resolve_dispatch, &client, &index)
+            .with_reporter(ResolverReporter::from(printer))
+            .resolve()
+            .await?;
+
     // Build all editable distributions. The editables are shared between resolution and
     // installation, and should live for the duration of the command. If an editable is already
     // installed in the environment, we'll still re-build it here.
@@ -270,10 +308,11 @@ pub(crate) async fn pip_install(
     let editables = if editables.is_empty() {
         vec![]
     } else {
-        editable_wheel_dir = tempdir_in(venv.root())?;
+        editable_wheel_dir = tempdir_in(cache.root())?;
         build_editables(
             &editables,
             editable_wheel_dir.path(),
+            &hasher,
             &cache,
             &interpreter,
             tags,
@@ -298,6 +337,7 @@ pub(crate) async fn pip_install(
         overrides,
         project,
         &editables,
+        &hasher,
         &site_packages,
         &reinstall,
         &upgrade,
@@ -358,6 +398,7 @@ pub(crate) async fn pip_install(
         link_mode,
         compile,
         &index_locations,
+        &hasher,
         tags,
         &client,
         &in_flight,
@@ -385,13 +426,13 @@ async fn read_requirements(
     extras: &ExtrasSpecification<'_>,
     client_builder: &BaseClientBuilder<'_>,
 ) -> Result<RequirementsSpecification, Error> {
-    // If the user requests `extras` but does not provide a pyproject toml source
-    if !matches!(extras, ExtrasSpecification::None)
-        && !requirements
-            .iter()
-            .any(|source| matches!(source, RequirementsSource::PyprojectToml(_)))
-    {
-        return Err(anyhow!("Requesting extras requires a pyproject.toml input file.").into());
+    // If the user requests `extras` but does not provide a valid source (e.g., a `pyproject.toml`),
+    // return an error.
+    if !extras.is_empty() && !requirements.iter().any(RequirementsSource::allows_extras) {
+        return Err(anyhow!(
+            "Requesting extras requires a `pyproject.toml`, `setup.cfg`, or `setup.py` file."
+        )
+        .into());
     }
 
     // Read all requirements from the provided sources.
@@ -404,21 +445,24 @@ async fn read_requirements(
     )
     .await?;
 
-    // Check that all provided extras are used
-    if let ExtrasSpecification::Some(extras) = extras {
-        let mut unused_extras = extras
-            .iter()
-            .filter(|extra| !spec.extras.contains(extra))
-            .collect::<Vec<_>>();
-        if !unused_extras.is_empty() {
-            unused_extras.sort_unstable();
-            unused_extras.dedup();
-            let s = if unused_extras.len() == 1 { "" } else { "s" };
-            return Err(anyhow!(
-                "Requested extra{s} not found: {}",
-                unused_extras.iter().join(", ")
-            )
-            .into());
+    // If all the metadata could be statically resolved, validate that every extra was used. If we
+    // need to resolve metadata via PEP 517, we don't know which extras are used until much later.
+    if spec.source_trees.is_empty() {
+        if let ExtrasSpecification::Some(extras) = extras {
+            let mut unused_extras = extras
+                .iter()
+                .filter(|extra| !spec.extras.contains(extra))
+                .collect::<Vec<_>>();
+            if !unused_extras.is_empty() {
+                unused_extras.sort_unstable();
+                unused_extras.dedup();
+                let s = if unused_extras.len() == 1 { "" } else { "s" };
+                return Err(anyhow!(
+                    "Requested extra{s} not found: {}",
+                    unused_extras.iter().join(", ")
+                )
+                .into());
+            }
         }
     }
 
@@ -430,6 +474,7 @@ async fn read_requirements(
 async fn build_editables(
     editables: &[EditableRequirement],
     editable_wheel_dir: &Path,
+    hasher: &HashStrategy,
     cache: &Cache,
     interpreter: &Interpreter,
     tags: &Tags,
@@ -439,20 +484,17 @@ async fn build_editables(
 ) -> Result<Vec<BuiltEditable>, Error> {
     let start = std::time::Instant::now();
 
-    let downloader = Downloader::new(cache, tags, client, build_dispatch)
+    let downloader = Downloader::new(cache, tags, hasher, client, build_dispatch)
         .with_reporter(DownloadReporter::from(printer).with_length(editables.len() as u64));
 
-    let editables: Vec<LocalEditable> = editables
-        .iter()
-        .map(|editable| {
-            let EditableRequirement { url, extras, path } = editable;
-            Ok(LocalEditable {
-                url: url.clone(),
-                extras: extras.clone(),
-                path: path.clone(),
-            })
-        })
-        .collect::<Result<_>>()?;
+    let editables = LocalEditables::from_editables(editables.iter().map(|editable| {
+        let EditableRequirement { url, extras, path } = editable;
+        LocalEditable {
+            url: url.clone(),
+            extras: extras.clone(),
+            path: path.clone(),
+        }
+    }));
 
     let editables: Vec<_> = downloader
         .build_editables(editables, editable_wheel_dir)
@@ -499,6 +541,7 @@ async fn resolve(
     overrides: Vec<Requirement>,
     project: Option<PackageName>,
     editables: &[BuiltEditable],
+    hasher: &HashStrategy,
     site_packages: &SitePackages<'_>,
     reinstall: &Reinstall,
     upgrade: &Upgrade,
@@ -545,6 +588,7 @@ async fn resolve(
         &constraints,
         &overrides,
         &editables,
+        hasher,
         build_dispatch,
         client,
         index,
@@ -575,6 +619,7 @@ async fn resolve(
         client,
         flat_index,
         index,
+        hasher,
         build_dispatch,
         site_packages,
     )?
@@ -593,6 +638,17 @@ async fn resolve(
         .dimmed()
     )?;
 
+    // Notify the user of any diagnostics.
+    for diagnostic in resolution.diagnostics() {
+        writeln!(
+            printer.stderr(),
+            "{}{} {}",
+            "warning".yellow().bold(),
+            ":".bold(),
+            diagnostic.message().bold()
+        )?;
+    }
+
     Ok(resolution)
 }
 
@@ -607,6 +663,7 @@ async fn install(
     link_mode: LinkMode,
     compile: bool,
     index_urls: &IndexLocations,
+    hasher: &HashStrategy,
     tags: &Tags,
     client: &RegistryClient,
     in_flight: &InFlight,
@@ -634,6 +691,7 @@ async fn install(
             site_packages,
             reinstall,
             no_binary,
+            hasher,
             index_urls,
             cache,
             venv,
@@ -686,7 +744,7 @@ async fn install(
     } else {
         let start = std::time::Instant::now();
 
-        let downloader = Downloader::new(cache, tags, client, build_dispatch)
+        let downloader = Downloader::new(cache, tags, hasher, client, build_dispatch)
             .with_reporter(DownloadReporter::from(printer).with_length(remote.len() as u64));
 
         let wheels = downloader
@@ -1002,6 +1060,9 @@ enum Error {
     #[error(transparent)]
     Platform(#[from] platform_tags::PlatformError),
 
+    #[error(transparent)]
+    Hash(#[from] uv_types::HashStrategyError),
+
     #[error(transparent)]
     Io(#[from] std::io::Error),
 
diff --git a/crates/uv/src/commands/pip_sync.rs b/crates/uv/src/commands/pip_sync.rs
index d9ad30410..218ad29c3 100644
--- a/crates/uv/src/commands/pip_sync.rs
+++ b/crates/uv/src/commands/pip_sync.rs
@@ -1,22 +1,26 @@
 use std::fmt::Write;
 
+use anstream::eprint;
 use anyhow::{anyhow, Context, Result};
 use itertools::Itertools;
 use owo_colors::OwoColorize;
 use tracing::debug;
 
 use distribution_types::{
-    IndexLocations, InstalledMetadata, LocalDist, LocalEditable, Name, ResolvedDist,
+    IndexLocations, InstalledMetadata, LocalDist, LocalEditable, LocalEditables, Name, ResolvedDist,
 };
 use install_wheel_rs::linker::LinkMode;
+
 use platform_tags::Tags;
 use pypi_types::Yanked;
 use requirements_txt::EditableRequirement;
 use uv_auth::{KeyringProvider, GLOBAL_AUTH_STORE};
 use uv_cache::{ArchiveTarget, ArchiveTimestamp, Cache};
 use uv_client::{
-    BaseClientBuilder, Connectivity, FlatIndex, FlatIndexClient, RegistryClient,
-    RegistryClientBuilder,
+    BaseClientBuilder, Connectivity, FlatIndexClient, RegistryClient, RegistryClientBuilder,
+};
+use uv_configuration::{
+    ConfigSettings, IndexStrategy, NoBinary, NoBuild, Reinstall, SetupPyStrategy,
 };
 use uv_dispatch::BuildDispatch;
 use uv_fs::Simplified;
@@ -26,11 +30,8 @@ use uv_requirements::{
     ExtrasSpecification, NamedRequirementsResolver, RequirementsSource, RequirementsSpecification,
     SourceTreeResolver,
 };
-use uv_resolver::{DependencyMode, InMemoryIndex, Manifest, OptionsBuilder, Resolver};
-use uv_types::{
-    BuildIsolation, ConfigSettings, EmptyInstalledPackages, InFlight, NoBinary, NoBuild, Reinstall,
-    SetupPyStrategy,
-};
+use uv_resolver::{DependencyMode, FlatIndex, InMemoryIndex, Manifest, OptionsBuilder, Resolver};
+use uv_types::{BuildIsolation, EmptyInstalledPackages, HashStrategy, InFlight};
 use uv_warnings::warn_user;
 
 use crate::commands::reporters::{DownloadReporter, InstallReporter, ResolverReporter};
@@ -44,7 +45,9 @@ pub(crate) async fn pip_sync(
     reinstall: &Reinstall,
     link_mode: LinkMode,
     compile: bool,
+    require_hashes: bool,
     index_locations: IndexLocations,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     setup_py: SetupPyStrategy,
     connectivity: Connectivity,
@@ -61,6 +64,7 @@ pub(crate) async fn pip_sync(
     printer: Printer,
 ) -> Result<ExitStatus> {
     let start = std::time::Instant::now();
+
     let client_builder = BaseClientBuilder::new()
         .connectivity(connectivity)
         .native_tls(native_tls)
@@ -128,6 +132,19 @@ pub(crate) async fn pip_sync(
 
     // Determine the current environment markers.
     let tags = venv.interpreter().tags()?;
+    let markers = venv.interpreter().markers();
+
+    // Collect the set of required hashes.
+    let hasher = if require_hashes {
+        HashStrategy::from_requirements(
+            requirements
+                .iter()
+                .map(|entry| (&entry.requirement, entry.hashes.as_slice())),
+            markers,
+        )?
+    } else {
+        HashStrategy::None
+    };
 
     // Incorporate any index locations from the provided sources.
     let index_locations =
@@ -143,6 +160,7 @@ pub(crate) async fn pip_sync(
         .native_tls(native_tls)
         .connectivity(connectivity)
         .index_urls(index_locations.index_urls())
+        .index_strategy(index_strategy)
         .keyring_provider(keyring_provider)
         .markers(venv.interpreter().markers())
         .platform(venv.interpreter().platform())
@@ -152,7 +170,7 @@ pub(crate) async fn pip_sync(
     let flat_index = {
         let client = FlatIndexClient::new(&client, &cache);
         let entries = client.fetch(index_locations.flat_index()).await?;
-        FlatIndex::from_entries(entries, tags)
+        FlatIndex::from_entries(entries, tags, &hasher, &no_build, &no_binary)
     };
 
     // Create a shared in-memory index.
@@ -195,7 +213,7 @@ pub(crate) async fn pip_sync(
     let requirements = {
         // Convert from unnamed to named requirements.
         let mut requirements =
-            NamedRequirementsResolver::new(requirements, &build_dispatch, &client, &index)
+            NamedRequirementsResolver::new(requirements, &hasher, &build_dispatch, &client, &index)
                 .with_reporter(ResolverReporter::from(printer))
                 .resolve()
                 .await?;
@@ -206,6 +224,7 @@ pub(crate) async fn pip_sync(
                 SourceTreeResolver::new(
                     source_trees,
                     &ExtrasSpecification::None,
+                    &hasher,
                     &build_dispatch,
                     &client,
                     &index,
@@ -224,6 +243,7 @@ pub(crate) async fn pip_sync(
         editables,
         &site_packages,
         reinstall,
+        &hasher,
         venv.interpreter(),
         tags,
         &cache,
@@ -247,6 +267,7 @@ pub(crate) async fn pip_sync(
             site_packages,
             reinstall,
             &no_binary,
+            &hasher,
             &index_locations,
             &cache,
             &venv,
@@ -300,12 +321,22 @@ pub(crate) async fn pip_sync(
             &client,
             &flat_index,
             &index,
+            &hasher,
             &build_dispatch,
             // TODO(zanieb): We should consider support for installed packages in pip sync
             &EmptyInstalledPackages,
         )?
         .with_reporter(reporter);
-        let resolution = resolver.resolve().await?;
+
+        let resolution = match resolver.resolve().await {
+            Err(uv_resolver::ResolveError::NoSolution(err)) => {
+                let report = miette::Report::msg(format!("{err}"))
+                    .context("No solution found when resolving dependencies:");
+                eprint!("{report:?}");
+                return Ok(ExitStatus::Failure);
+            }
+            result => result,
+        }?;
 
         let s = if resolution.len() == 1 { "" } else { "s" };
         writeln!(
@@ -334,7 +365,7 @@ pub(crate) async fn pip_sync(
     } else {
         let start = std::time::Instant::now();
 
-        let downloader = Downloader::new(&cache, tags, &client, &build_dispatch)
+        let downloader = Downloader::new(&cache, tags, &hasher, &client, &build_dispatch)
             .with_reporter(DownloadReporter::from(printer).with_length(remote.len() as u64));
 
         let wheels = downloader
@@ -530,6 +561,7 @@ async fn resolve_editables(
     editables: Vec<EditableRequirement>,
     site_packages: &SitePackages<'_>,
     reinstall: &Reinstall,
+    hasher: &HashStrategy,
     interpreter: &Interpreter,
     tags: &Tags,
     cache: &Cache,
@@ -596,32 +628,28 @@ async fn resolve_editables(
     } else {
         let start = std::time::Instant::now();
 
-        let temp_dir = tempfile::tempdir_in(cache.root())?;
-
-        let downloader = Downloader::new(cache, tags, client, build_dispatch)
+        let downloader = Downloader::new(cache, tags, hasher, client, build_dispatch)
             .with_reporter(DownloadReporter::from(printer).with_length(uninstalled.len() as u64));
 
-        let local_editables: Vec<LocalEditable> = uninstalled
-            .iter()
-            .map(|editable| {
-                let EditableRequirement { url, path, extras } = editable;
-                Ok(LocalEditable {
-                    url: url.clone(),
-                    path: path.clone(),
-                    extras: extras.clone(),
-                })
-            })
-            .collect::<Result<_>>()?;
+        let editables = LocalEditables::from_editables(uninstalled.iter().map(|editable| {
+            let EditableRequirement { url, path, extras } = editable;
+            LocalEditable {
+                url: url.clone(),
+                path: path.clone(),
+                extras: extras.clone(),
+            }
+        }));
 
-        let built_editables: Vec<_> = downloader
-            .build_editables(local_editables, temp_dir.path())
+        let editable_wheel_dir = tempfile::tempdir_in(cache.root())?;
+        let editables: Vec<_> = downloader
+            .build_editables(editables, editable_wheel_dir.path())
             .await
             .context("Failed to build editables")?
             .into_iter()
             .collect();
 
         // Validate that the editables are compatible with the target Python version.
-        for editable in &built_editables {
+        for editable in &editables {
             if let Some(python_requires) = editable.metadata.requires_python.as_ref() {
                 if !python_requires.contains(interpreter.python_version()) {
                     return Err(anyhow!(
@@ -634,19 +662,19 @@ async fn resolve_editables(
             }
         }
 
-        let s = if built_editables.len() == 1 { "" } else { "s" };
+        let s = if editables.len() == 1 { "" } else { "s" };
         writeln!(
             printer.stderr(),
             "{}",
             format!(
                 "Built {} in {}",
-                format!("{} editable{}", built_editables.len(), s).bold(),
+                format!("{} editable{}", editables.len(), s).bold(),
                 elapsed(start.elapsed())
             )
             .dimmed()
         )?;
 
-        (built_editables, Some(temp_dir))
+        (editables, Some(editable_wheel_dir))
     };
 
     Ok(ResolvedEditables {
diff --git a/crates/uv/src/commands/pip_uninstall.rs b/crates/uv/src/commands/pip_uninstall.rs
index e4d91154d..45e19da59 100644
--- a/crates/uv/src/commands/pip_uninstall.rs
+++ b/crates/uv/src/commands/pip_uninstall.rs
@@ -82,7 +82,7 @@ pub(crate) async fn pip_uninstall(
     let (named, unnamed): (Vec<Requirement>, Vec<UnnamedRequirement>) = spec
         .requirements
         .into_iter()
-        .partition_map(|requirement| match requirement {
+        .partition_map(|entry| match entry.requirement {
             RequirementsTxtRequirement::Pep508(requirement) => Either::Left(requirement),
             RequirementsTxtRequirement::Unnamed(requirement) => Either::Right(requirement),
         });
diff --git a/crates/uv/src/commands/venv.rs b/crates/uv/src/commands/venv.rs
index 6faa5e131..6f44fecbe 100644
--- a/crates/uv/src/commands/venv.rs
+++ b/crates/uv/src/commands/venv.rs
@@ -15,14 +15,13 @@ use distribution_types::{DistributionMetadata, IndexLocations, Name, ResolvedDis
 use pep508_rs::Requirement;
 use uv_auth::{KeyringProvider, GLOBAL_AUTH_STORE};
 use uv_cache::Cache;
-use uv_client::{Connectivity, FlatIndex, FlatIndexClient, RegistryClientBuilder};
+use uv_client::{Connectivity, FlatIndexClient, RegistryClientBuilder};
+use uv_configuration::{ConfigSettings, IndexStrategy, NoBinary, NoBuild, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_fs::Simplified;
 use uv_interpreter::{find_default_python, find_requested_python, Error};
-use uv_resolver::{InMemoryIndex, OptionsBuilder};
-use uv_types::{
-    BuildContext, BuildIsolation, ConfigSettings, InFlight, NoBinary, NoBuild, SetupPyStrategy,
-};
+use uv_resolver::{FlatIndex, InMemoryIndex, OptionsBuilder};
+use uv_types::{BuildContext, BuildIsolation, HashStrategy, InFlight};
 
 use crate::commands::ExitStatus;
 use crate::printer::Printer;
@@ -34,6 +33,7 @@ pub(crate) async fn venv(
     path: &Path,
     python_request: Option<&str>,
     index_locations: &IndexLocations,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     prompt: uv_virtualenv::Prompt,
     system_site_packages: bool,
@@ -48,6 +48,7 @@ pub(crate) async fn venv(
         path,
         python_request,
         index_locations,
+        index_strategy,
         keyring_provider,
         prompt,
         system_site_packages,
@@ -93,6 +94,7 @@ async fn venv_impl(
     path: &Path,
     python_request: Option<&str>,
     index_locations: &IndexLocations,
+    index_strategy: IndexStrategy,
     keyring_provider: KeyringProvider,
     prompt: uv_virtualenv::Prompt,
     system_site_packages: bool,
@@ -150,6 +152,7 @@ async fn venv_impl(
         let client = RegistryClientBuilder::new(cache.clone())
             .native_tls(native_tls)
             .index_urls(index_locations.index_urls())
+            .index_strategy(index_strategy)
             .keyring_provider(keyring_provider)
             .connectivity(connectivity)
             .markers(interpreter.markers())
@@ -164,7 +167,13 @@ async fn venv_impl(
                 .fetch(index_locations.flat_index())
                 .await
                 .map_err(VenvError::FlatIndex)?;
-            FlatIndex::from_entries(entries, tags)
+            FlatIndex::from_entries(
+                entries,
+                tags,
+                &HashStrategy::None,
+                &NoBuild::All,
+                &NoBinary::None,
+            )
         };
 
         // Create a shared in-memory index.
diff --git a/crates/uv/src/logging.rs b/crates/uv/src/logging.rs
index 67c491a4d..3ba021d59 100644
--- a/crates/uv/src/logging.rs
+++ b/crates/uv/src/logging.rs
@@ -5,7 +5,6 @@ use std::str::FromStr;
 use anyhow::Context;
 use chrono::Utc;
 use owo_colors::OwoColorize;
-use tracing::level_filters::LevelFilter;
 use tracing::{Event, Subscriber};
 #[cfg(feature = "tracing-durations-export")]
 use tracing_durations_export::{
@@ -115,19 +114,26 @@ where
 /// includes targets and timestamps, along with all `uv=debug` messages by default.
 pub(crate) fn setup_logging(
     level: Level,
-    duration: impl Layer<Registry> + Send + Sync,
+    durations: impl Layer<Registry> + Send + Sync,
 ) -> anyhow::Result<()> {
     let default_directive = match level {
         Level::Default => {
             // Show nothing, but allow `RUST_LOG` to override.
-            LevelFilter::OFF.into()
+            tracing::level_filters::LevelFilter::OFF.into()
         }
         Level::Verbose | Level::ExtraVerbose => {
             // Show `DEBUG` messages from the CLI crate, but allow `RUST_LOG` to override.
-            Directive::from_str("uv=debug").unwrap()
+            Directive::from_str("uv=trace").unwrap()
         }
     };
 
+    // Only record our own spans.
+    let durations_layer =
+        durations.with_filter(tracing_subscriber::filter::Targets::new().with_target(
+            env!("CARGO_PKG_NAME"),
+            tracing::level_filters::LevelFilter::INFO,
+        ));
+
     let filter = EnvFilter::builder()
         .with_default_directive(default_directive)
         .from_env()
@@ -148,26 +154,26 @@ pub(crate) fn setup_logging(
                 ColorChoice::Auto => unreachable!(),
             };
             tracing_subscriber::registry()
-                .with(duration)
-                .with(filter)
+                .with(durations_layer)
                 .with(
                     tracing_subscriber::fmt::layer()
                         .event_format(format)
                         .with_writer(std::io::stderr)
-                        .with_ansi(ansi),
+                        .with_ansi(ansi)
+                        .with_filter(filter),
                 )
                 .init();
         }
         Level::ExtraVerbose => {
             // Regardless of the tracing level, include the uptime and target for each message.
             tracing_subscriber::registry()
-                .with(duration)
-                .with(filter)
+                .with(durations_layer)
                 .with(
                     HierarchicalLayer::default()
                         .with_targets(true)
                         .with_timer(Uptime::default())
-                        .with_writer(std::io::stderr),
+                        .with_writer(std::io::stderr)
+                        .with_filter(filter),
                 )
                 .init();
         }
@@ -178,15 +184,15 @@ pub(crate) fn setup_logging(
 
 /// Setup the `TRACING_DURATIONS_FILE` environment variable to enable tracing durations.
 #[cfg(feature = "tracing-durations-export")]
-pub(crate) fn setup_duration() -> (
+pub(crate) fn setup_duration() -> anyhow::Result<(
     Option<DurationsLayer<Registry>>,
     Option<DurationsLayerDropGuard>,
-) {
+)> {
     if let Ok(location) = std::env::var("TRACING_DURATIONS_FILE") {
         let location = std::path::PathBuf::from(location);
         if let Some(parent) = location.parent() {
             fs_err::create_dir_all(parent)
-                .expect("Failed to create parent of TRACING_DURATIONS_FILE");
+                .context("Failed to create parent of TRACING_DURATIONS_FILE")?;
         }
         let plot_config = PlotConfig {
             multi_lane: true,
@@ -203,9 +209,9 @@ pub(crate) fn setup_duration() -> (
             .plot_file(location.with_extension("svg"))
             .plot_config(plot_config)
             .build()
-            .expect("Couldn't create TRACING_DURATIONS_FILE files");
-        (Some(layer), Some(guard))
+            .context("Couldn't create TRACING_DURATIONS_FILE files")?;
+        Ok((Some(layer), Some(guard)))
     } else {
-        (None, None)
+        Ok((None, None))
     }
 }
diff --git a/crates/uv/src/main.rs b/crates/uv/src/main.rs
index 97511eb4d..d39b7198c 100644
--- a/crates/uv/src/main.rs
+++ b/crates/uv/src/main.rs
@@ -16,15 +16,15 @@ use distribution_types::{FlatIndexLocation, IndexLocations, IndexUrl};
 use uv_auth::KeyringProvider;
 use uv_cache::{Cache, CacheArgs, Refresh};
 use uv_client::Connectivity;
-use uv_interpreter::PythonVersion;
-use uv_normalize::{ExtraName, PackageName};
-use uv_requirements::{ExtrasSpecification, RequirementsSource};
-use uv_resolver::{AnnotationStyle, DependencyMode, PreReleaseMode, ResolutionMode};
-use uv_types::NoBinary;
-use uv_types::{
+use uv_configuration::{
     ConfigSettingEntry, ConfigSettings, NoBuild, PackageNameSpecifier, Reinstall, SetupPyStrategy,
     Upgrade,
 };
+use uv_configuration::{IndexStrategy, NoBinary};
+use uv_normalize::{ExtraName, PackageName};
+use uv_requirements::{ExtrasSpecification, RequirementsSource};
+use uv_resolver::{AnnotationStyle, DependencyMode, PreReleaseMode, ResolutionMode};
+use uv_toolchain::PythonVersion;
 
 use crate::commands::{extra_name_with_clap_error, ExitStatus, ListFormat, VersionFormat};
 use crate::compat::CompatArgs;
@@ -335,6 +335,10 @@ struct PipCompileArgs {
     #[clap(long)]
     no_header: bool,
 
+    /// Choose the style of the annotation comments, which indicate the source of each package.
+    #[clap(long, default_value_t=AnnotationStyle::Split, value_enum)]
+    annotation_style: AnnotationStyle,
+
     /// Change header comment to reflect custom command wrapping `uv pip compile`.
     #[clap(long, env = "UV_CUSTOM_COMPILE_COMMAND")]
     custom_compile_command: Option<String>,
@@ -384,6 +388,15 @@ struct PipCompileArgs {
     #[clap(long, conflicts_with = "index_url", conflicts_with = "extra_index_url")]
     no_index: bool,
 
+    /// The strategy to use when resolving against multiple index URLs.
+    ///
+    /// By default, `uv` will stop at the first index on which a given package is available, and
+    /// limit resolutions to those present on that first index. This prevents "dependency confusion"
+    /// attacks, whereby an attack can upload a malicious package under the same name to a secondary
+    /// index.
+    #[clap(long, default_value_t, value_enum, env = "UV_INDEX_STRATEGY")]
+    index_strategy: IndexStrategy,
+
     /// Attempt to use `keyring` for authentication for index urls
     ///
     /// Due to not having Python imports, only `--keyring-provider subprocess` argument is currently
@@ -486,9 +499,10 @@ struct PipCompileArgs {
     #[clap(long, hide = true)]
     emit_marker_expression: bool,
 
-    /// Choose the style of the annotation comments, which indicate the source of each package.
-    #[clap(long, default_value_t=AnnotationStyle::Split, value_enum)]
-    annotation_style: AnnotationStyle,
+    /// Include comment annotations indicating the index used to resolve each package (e.g.,
+    /// `# from https://pypi.org/simple`).
+    #[clap(long)]
+    emit_index_annotation: bool,
 
     #[command(flatten)]
     compat_args: compat::PipCompileCompatArgs,
@@ -570,6 +584,29 @@ struct PipSyncArgs {
     #[clap(long, conflicts_with = "index_url", conflicts_with = "extra_index_url")]
     no_index: bool,
 
+    /// The strategy to use when resolving against multiple index URLs.
+    ///
+    /// By default, `uv` will stop at the first index on which a given package is available, and
+    /// limit resolutions to those present on that first index. This prevents "dependency confusion"
+    /// attacks, whereby an attack can upload a malicious package under the same name to a secondary
+    /// index.
+    #[clap(long, default_value_t, value_enum, env = "UV_INDEX_STRATEGY")]
+    index_strategy: IndexStrategy,
+
+    /// Require a matching hash for each requirement.
+    ///
+    /// Hash-checking mode is all or nothing. If enabled, _all_ requirements must be provided
+    /// with a corresponding hash or set of hashes. Additionally, if enabled, _all_ requirements
+    /// must either be pinned to exact versions (e.g., `==1.0.0`), or be specified via direct URL.
+    ///
+    /// Hash-checking mode introduces a number of additional constraints:
+    /// - Git dependencies are not supported.
+    /// - Editable installs are not supported.
+    /// - Local dependencies are not supported, unless they point to a specific wheel (`.whl`) or
+    ///   source archive (`.zip`, `.tar.gz`), as opposed to a directory.
+    #[clap(long, hide = true)]
+    require_hashes: bool,
+
     /// Attempt to use `keyring` for authentication for index urls
     ///
     /// Function's similar to `pip`'s `--keyring-provider subprocess` argument,
@@ -620,7 +657,7 @@ struct PipSyncArgs {
     /// environments, when installing into Python installations that are managed by an external
     /// package manager, like `apt`. It should be used with caution, as such Python installations
     /// explicitly recommend against modifications by other package managers (like `uv` or `pip`).
-    #[clap(long, requires = "discovery")]
+    #[clap(long, env = "UV_BREAK_SYSTEM_PACKAGES", requires = "discovery")]
     break_system_packages: bool,
 
     /// Use legacy `setuptools` behavior when building source distributions without a
@@ -677,6 +714,10 @@ struct PipSyncArgs {
     #[clap(long)]
     compile: bool,
 
+    /// Don't compile Python files to bytecode.
+    #[clap(long, hide = true, conflicts_with = "compile")]
+    no_compile: bool,
+
     /// Settings to pass to the PEP 517 build backend, specified as `KEY=VALUE` pairs.
     #[clap(long, short = 'C', alias = "config-settings")]
     config_setting: Vec<ConfigSettingEntry>,
@@ -790,10 +831,6 @@ struct PipInstallArgs {
     #[clap(long, hide = true, conflicts_with = "prerelease")]
     pre: bool,
 
-    /// Write the compiled requirements to the given `requirements.txt` file.
-    #[clap(long, short)]
-    output_file: Option<PathBuf>,
-
     /// The URL of the Python package index (by default: <https://pypi.org/simple>).
     ///
     /// The index given by this flag is given lower priority than all other
@@ -831,6 +868,29 @@ struct PipInstallArgs {
     #[clap(long, conflicts_with = "index_url", conflicts_with = "extra_index_url")]
     no_index: bool,
 
+    /// The strategy to use when resolving against multiple index URLs.
+    ///
+    /// By default, `uv` will stop at the first index on which a given package is available, and
+    /// limit resolutions to those present on that first index. This prevents "dependency confusion"
+    /// attacks, whereby an attack can upload a malicious package under the same name to a secondary
+    /// index.
+    #[clap(long, default_value_t, value_enum, env = "UV_INDEX_STRATEGY")]
+    index_strategy: IndexStrategy,
+
+    /// Require a matching hash for each requirement.
+    ///
+    /// Hash-checking mode is all or nothing. If enabled, _all_ requirements must be provided
+    /// with a corresponding hash or set of hashes. Additionally, if enabled, _all_ requirements
+    /// must either be pinned to exact versions (e.g., `==1.0.0`), or be specified via direct URL.
+    ///
+    /// Hash-checking mode introduces a number of additional constraints:
+    /// - Git dependencies are not supported.
+    /// - Editable installs are not supported.
+    /// - Local dependencies are not supported, unless they point to a specific wheel (`.whl`) or
+    ///   source archive (`.zip`, `.tar.gz`), as opposed to a directory.
+    #[clap(long, hide = true)]
+    require_hashes: bool,
+
     /// Attempt to use `keyring` for authentication for index urls
     ///
     /// Due to not having Python imports, only `--keyring-provider subprocess` argument is currently
@@ -881,7 +941,7 @@ struct PipInstallArgs {
     /// environments, when installing into Python installations that are managed by an external
     /// package manager, like `apt`. It should be used with caution, as such Python installations
     /// explicitly recommend against modifications by other package managers (like `uv` or `pip`).
-    #[clap(long, requires = "discovery")]
+    #[clap(long, env = "UV_BREAK_SYSTEM_PACKAGES", requires = "discovery")]
     break_system_packages: bool,
 
     /// Use legacy `setuptools` behavior when building source distributions without a
@@ -938,6 +998,10 @@ struct PipInstallArgs {
     #[clap(long)]
     compile: bool,
 
+    /// Don't compile Python files to bytecode.
+    #[clap(long, hide = true, conflicts_with = "compile")]
+    no_compile: bool,
+
     /// Settings to pass to the PEP 517 build backend, specified as `KEY=VALUE` pairs.
     #[clap(long, short = 'C', alias = "config-settings")]
     config_setting: Vec<ConfigSettingEntry>,
@@ -1022,7 +1086,7 @@ struct PipUninstallArgs {
     /// environments, when installing into Python installations that are managed by an external
     /// package manager, like `apt`. It should be used with caution, as such Python installations
     /// explicitly recommend against modifications by other package managers (like `uv` or `pip`).
-    #[clap(long, requires = "discovery")]
+    #[clap(long, env = "UV_BREAK_SYSTEM_PACKAGES", requires = "discovery")]
     break_system_packages: bool,
 
     /// Run offline, i.e., without accessing the network.
@@ -1328,6 +1392,15 @@ struct VenvArgs {
     #[clap(long, conflicts_with = "index_url", conflicts_with = "extra_index_url")]
     no_index: bool,
 
+    /// The strategy to use when resolving against multiple index URLs.
+    ///
+    /// By default, `uv` will stop at the first index on which a given package is available, and
+    /// limit resolutions to those present on that first index. This prevents "dependency confusion"
+    /// attacks, whereby an attack can upload a malicious package under the same name to a secondary
+    /// index.
+    #[clap(long, default_value_t, value_enum, env = "UV_INDEX_STRATEGY")]
+    index_strategy: IndexStrategy,
+
     /// Attempt to use `keyring` for authentication for index urls
     ///
     /// Due to not having Python imports, only `--keyring-provider subprocess` argument is currently
@@ -1423,7 +1496,7 @@ async fn run() -> Result<ExitStatus> {
 
     // Configure the `tracing` crate, which controls internal logging.
     #[cfg(feature = "tracing-durations-export")]
-    let (duration_layer, _duration_guard) = logging::setup_duration();
+    let (duration_layer, _duration_guard) = logging::setup_duration()?;
     #[cfg(not(feature = "tracing-durations-export"))]
     let duration_layer = None::<tracing_subscriber::layer::Identity>;
     logging::setup_logging(
@@ -1543,7 +1616,9 @@ async fn run() -> Result<ExitStatus> {
                 args.emit_index_url,
                 args.emit_find_links,
                 args.emit_marker_expression,
+                args.emit_index_annotation,
                 index_urls,
+                args.index_strategy,
                 args.keyring_provider,
                 setup_py,
                 config_settings,
@@ -1599,7 +1674,9 @@ async fn run() -> Result<ExitStatus> {
                 &reinstall,
                 args.link_mode,
                 args.compile,
+                args.require_hashes,
                 index_urls,
+                args.index_strategy,
                 args.keyring_provider,
                 setup_py,
                 if args.offline {
@@ -1693,10 +1770,12 @@ async fn run() -> Result<ExitStatus> {
                 dependency_mode,
                 upgrade,
                 index_urls,
+                args.index_strategy,
                 args.keyring_provider,
                 reinstall,
                 args.link_mode,
                 args.compile,
+                args.require_hashes,
                 setup_py,
                 if args.offline {
                     Connectivity::Offline
@@ -1825,6 +1904,7 @@ async fn run() -> Result<ExitStatus> {
                 &args.name,
                 args.python.as_deref(),
                 &index_locations,
+                args.index_strategy,
                 args.keyring_provider,
                 uv_virtualenv::Prompt::from_args(prompt),
                 args.system_site_packages,
diff --git a/crates/uv/tests/cache_prune.rs b/crates/uv/tests/cache_prune.rs
index fe23ca759..4d96e6979 100644
--- a/crates/uv/tests/cache_prune.rs
+++ b/crates/uv/tests/cache_prune.rs
@@ -21,6 +21,7 @@ fn prune_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -41,6 +42,7 @@ fn sync_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -126,7 +128,7 @@ fn prune_stale_symlink() -> Result<()> {
         .success();
 
     // Remove the wheels directory, causing the symlink to become stale.
-    let wheels = context.cache_dir.child("wheels-v0");
+    let wheels = context.cache_dir.child("wheels-v1");
     fs_err::remove_dir_all(wheels)?;
 
     let filters: Vec<_> = context
diff --git a/crates/uv/tests/common/mod.rs b/crates/uv/tests/common/mod.rs
index f9f384165..2c85e3e7f 100644
--- a/crates/uv/tests/common/mod.rs
+++ b/crates/uv/tests/common/mod.rs
@@ -4,25 +4,29 @@
 use assert_cmd::assert::{Assert, OutputAssertExt};
 use assert_cmd::Command;
 use assert_fs::assert::PathAssert;
+
 use assert_fs::fixture::PathChild;
-#[cfg(unix)]
-use fs_err::os::unix::fs::symlink as symlink_file;
-#[cfg(windows)]
-use fs_err::os::windows::fs::symlink_file;
 use regex::Regex;
 use std::borrow::BorrowMut;
 use std::env;
 use std::ffi::OsString;
 use std::path::{Path, PathBuf};
 use std::process::Output;
-use uv_fs::Simplified;
+use std::str::FromStr;
+use uv_interpreter::find_requested_python;
 
 use uv_cache::Cache;
-use uv_interpreter::find_requested_python;
+use uv_fs::Simplified;
+use uv_toolchain::{toolchains_for_version, PythonVersion};
 
 // Exclude any packages uploaded after this date.
 pub static EXCLUDE_NEWER: &str = "2024-03-25T00:00:00Z";
 
+/// Using a find links url allows using `--index-url` instead of `--extra-index-url` in tests
+/// to prevent dependency confusion attacks against our test suite.
+pub const BUILD_VENDOR_LINKS_URL: &str =
+    "https://raw.githubusercontent.com/astral-sh/packse/0.3.14/vendor/links.html";
+
 #[doc(hidden)] // Macro and test context only, don't use directly.
 pub const INSTA_FILTERS: &[(&str, &str)] = &[
     (r"--cache-dir [^\s]+", "--cache-dir [CACHE_DIR]"),
@@ -69,6 +73,9 @@ impl TestContext {
 
         let site_packages = site_packages_path(&venv, format!("python{python_version}"));
 
+        let python_version =
+            PythonVersion::from_str(python_version).expect("Tests must use valid Python versions");
+
         let mut filters = Vec::new();
         filters.extend(
             Self::path_patterns(&cache_dir)
@@ -123,6 +130,18 @@ impl TestContext {
         // Destroy any remaining UNC prefixes (Windows only)
         filters.push((r"\\\\\?\\".to_string(), String::new()));
 
+        // Add Python patch version filtering unless explicitly requested to ensure
+        // snapshots are patch version agnostic when it is not a part of the test.
+        if python_version.patch().is_none() {
+            filters.push((
+                format!(
+                    r"({})\.\d+",
+                    regex::escape(python_version.to_string().as_str())
+                ),
+                "$1.[X]".to_string(),
+            ));
+        }
+
         Self {
             temp_dir,
             cache_dir,
@@ -139,14 +158,25 @@ impl TestContext {
     /// * Set a cutoff for versions used in the resolution so the snapshots don't change after a new release.
     /// * Set the venv to a fresh `.venv` in `temp_dir`.
     pub fn compile(&self) -> std::process::Command {
+        let mut command = self.compile_without_exclude_newer();
+        command.arg("--exclude-newer").arg(EXCLUDE_NEWER);
+        command
+    }
+
+    /// Create a `pip compile` command with no `--exclude-newer` option.
+    ///
+    /// One should avoid using this in tests to the extent possible because
+    /// it can result in tests failing when the index state changes. Therefore,
+    /// if you use this, there should be some other kind of mitigation in place.
+    /// For example, pinning package versions.
+    pub fn compile_without_exclude_newer(&self) -> std::process::Command {
         let mut cmd = std::process::Command::new(get_bin());
         cmd.arg("pip")
             .arg("compile")
             .arg("--cache-dir")
             .arg(self.cache_dir.path())
-            .arg("--exclude-newer")
-            .arg(EXCLUDE_NEWER)
             .env("VIRTUAL_ENV", self.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(self.temp_dir.path());
 
         if cfg!(all(windows, debug_assertions)) {
@@ -179,6 +209,7 @@ impl TestContext {
             .arg("--cache-dir")
             .arg(self.cache_dir.path())
             .env("VIRTUAL_ENV", self.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(&self.temp_dir);
 
         if cfg!(all(windows, debug_assertions)) {
@@ -288,81 +319,23 @@ pub fn venv_to_interpreter(venv: &Path) -> PathBuf {
     }
 }
 
-/// If bootstrapped python build standalone pythons exists in `<project root>/bin`,
-/// return the paths to the directories containing the python binaries (i.e. as paths that
-/// `which::which_in` can use).
-///
-/// Use `scripts/bootstrap/install.py` to bootstrap.
-///
-/// Python versions are sorted from newest to oldest.
-pub fn bootstrapped_pythons() -> Option<Vec<PathBuf>> {
-    // Current dir is `<project root>/crates/uv`.
-    let project_root = std::env::current_dir()
-        .unwrap()
-        .parent()
-        .unwrap()
-        .parent()
-        .unwrap()
-        .to_path_buf();
-    let bootstrap_dir = if let Some(bootstrap_dir) = env::var_os("UV_BOOTSTRAP_DIR") {
-        let bootstrap_dir = PathBuf::from(bootstrap_dir);
-        if bootstrap_dir.is_absolute() {
-            bootstrap_dir
-        } else {
-            // cargo test changes directory to the test crate, but doesn't tell us from where the user is running the
-            // tests. We'll assume that it's the project root.
-            project_root.join(bootstrap_dir)
-        }
-    } else {
-        project_root.join("bin")
-    };
-    let bootstrapped_pythons = bootstrap_dir.join("versions");
-    let Ok(bootstrapped_pythons) = fs_err::read_dir(bootstrapped_pythons) else {
-        return None;
-    };
-
-    let mut bootstrapped_pythons: Vec<PathBuf> = bootstrapped_pythons
-        .map(Result::unwrap)
-        .filter(|entry| entry.metadata().unwrap().is_dir())
-        .map(|entry| {
-            if cfg!(unix) {
-                entry.path().join("install").join("bin")
-            } else if cfg!(windows) {
-                entry.path().join("install")
-            } else {
-                unimplemented!("Only Windows and Unix are supported")
-            }
-        })
-        .collect();
-    bootstrapped_pythons.sort();
-    // Prefer the most recent patch version.
-    bootstrapped_pythons.reverse();
-    Some(bootstrapped_pythons)
-}
-
 /// Create a virtual environment named `.venv` in a temporary directory with the given
-/// Python version. Expected format for `python` is "python<version>".
+/// Python version. Expected format for `python` is "<version>".
 pub fn create_venv<Parent: assert_fs::prelude::PathChild + AsRef<std::path::Path>>(
     temp_dir: &Parent,
     cache_dir: &assert_fs::TempDir,
     python: &str,
 ) -> PathBuf {
-    let python = if let Some(bootstrapped_pythons) = bootstrapped_pythons() {
-        bootstrapped_pythons
-            .into_iter()
-            // Good enough since we control the directory
-            .find(|path| path.to_str().unwrap().contains(&format!("@{python}")))
-            .expect("Missing python bootstrap version")
-            .join(if cfg!(unix) {
-                "python3"
-            } else if cfg!(windows) {
-                "python.exe"
-            } else {
-                unimplemented!("Only Windows and Unix are supported")
-            })
-    } else {
-        PathBuf::from(python)
-    };
+    let python = toolchains_for_version(
+        &PythonVersion::from_str(python).expect("Tests should use a valid Python version"),
+    )
+    .expect("Tests are run on a supported platform")
+    .first()
+    .map(uv_toolchain::Toolchain::executable)
+    // We'll search for the request Python on the PATH if not found in the toolchain versions
+    // We hack this into a `PathBuf` to satisfy the compiler but it's just a string
+    .unwrap_or(PathBuf::from(python));
+
     let venv = temp_dir.child(".venv");
     Command::new(get_bin())
         .arg("venv")
@@ -386,34 +359,48 @@ pub fn get_bin() -> PathBuf {
 }
 
 /// Create a `PATH` with the requested Python versions available in order.
-pub fn create_bin_with_executables(
+///
+/// Generally this should be used with `UV_TEST_PYTHON_PATH`.
+pub fn python_path_with_versions(
     temp_dir: &assert_fs::TempDir,
     python_versions: &[&str],
 ) -> anyhow::Result<OsString> {
-    if let Some(bootstrapped_pythons) = bootstrapped_pythons() {
-        let selected_pythons = python_versions.iter().flat_map(|python_version| {
-            bootstrapped_pythons.iter().filter(move |path| {
-                // Good enough since we control the directory
-                path.to_str()
-                    .unwrap()
-                    .contains(&format!("@{python_version}"))
+    let cache = Cache::from_path(temp_dir.child("cache").to_path_buf())?;
+    let selected_pythons = python_versions
+        .iter()
+        .flat_map(|python_version| {
+            let inner = toolchains_for_version(
+                &PythonVersion::from_str(python_version)
+                    .expect("Tests should use a valid Python version"),
+            )
+            .expect("Tests are run on a supported platform")
+            .iter()
+            .map(|toolchain| {
+                toolchain
+                    .executable()
+                    .parent()
+                    .expect("Executables must exist in a directory")
+                    .to_path_buf()
             })
-        });
-        return Ok(env::join_paths(selected_pythons)?);
-    }
+            .collect::<Vec<_>>();
+            if inner.is_empty() {
+                // Fallback to a system lookup if we failed to find one in the toolchain directory
+                if let Some(interpreter) = find_requested_python(python_version, &cache).unwrap() {
+                    vec![interpreter
+                        .sys_executable()
+                        .parent()
+                        .expect("Python executable should always be in a directory")
+                        .to_path_buf()]
+                } else {
+                    panic!("Could not find Python {python_version} for test");
+                }
+            } else {
+                inner
+            }
+        })
+        .collect::<Vec<_>>();
 
-    let bin = temp_dir.child("bin");
-    fs_err::create_dir(&bin)?;
-    for &request in python_versions {
-        let interpreter = find_requested_python(request, &Cache::temp().unwrap())?
-            .ok_or(uv_interpreter::Error::NoSuchPython(request.to_string()))?;
-        let name = interpreter
-            .sys_executable()
-            .file_name()
-            .expect("Discovered executable must have a filename");
-        symlink_file(interpreter.sys_executable(), bin.child(name))?;
-    }
-    Ok(bin.canonicalize()?.into())
+    Ok(env::join_paths(selected_pythons)?)
 }
 
 /// Execute the command and format its output status, stdout and stderr into a snapshot string.
@@ -422,6 +409,7 @@ pub fn create_bin_with_executables(
 pub fn run_and_format<T: AsRef<str>>(
     mut command: impl BorrowMut<std::process::Command>,
     filters: impl AsRef<[(T, T)]>,
+    function_name: &str,
     windows_filters: bool,
 ) -> (String, Output) {
     let program = command
@@ -429,6 +417,19 @@ pub fn run_and_format<T: AsRef<str>>(
         .get_program()
         .to_string_lossy()
         .to_string();
+
+    // Support profiling test run commands with traces.
+    if let Ok(root) = env::var("TRACING_DURATIONS_TEST_ROOT") {
+        assert!(
+            cfg!(feature = "tracing-durations-export"),
+            "You need to enable the tracing-durations-export feature to use `TRACING_DURATIONS_TEST_ROOT`"
+        );
+        command.borrow_mut().env(
+            "TRACING_DURATIONS_FILE",
+            Path::new(&root).join(function_name).with_extension("jsonl"),
+        );
+    }
+
     let output = command
         .borrow_mut()
         .output()
@@ -499,6 +500,25 @@ pub fn copy_dir_all(src: impl AsRef<Path>, dst: impl AsRef<Path>) -> std::io::Re
     Ok(())
 }
 
+/// Utility macro to return the name of the current function.
+///
+/// https://stackoverflow.com/a/40234666/3549270
+#[doc(hidden)]
+#[macro_export]
+macro_rules! function_name {
+    () => {{
+        fn f() {}
+        fn type_name_of_val<T>(_: T) -> &'static str {
+            std::any::type_name::<T>()
+        }
+        let mut name = type_name_of_val(f).strip_suffix("::f").unwrap_or("");
+        while let Some(rest) = name.strip_suffix("::{{closure}}") {
+            name = rest;
+        }
+        name
+    }};
+}
+
 /// Run [`assert_cmd_snapshot!`], with default filters or with custom filters.
 ///
 /// By default, the filters will search for the generally windows-only deps colorama and tzdata,
@@ -510,13 +530,13 @@ macro_rules! uv_snapshot {
     }};
     ($filters:expr, $spawnable:expr, @$snapshot:literal) => {{
         // Take a reference for backwards compatibility with the vec-expecting insta filters.
-        let (snapshot, output) = $crate::common::run_and_format($spawnable, &$filters, true);
+        let (snapshot, output) = $crate::common::run_and_format($spawnable, &$filters, function_name!(), true);
         ::insta::assert_snapshot!(snapshot, @$snapshot);
         output
     }};
     ($filters:expr, windows_filters=false, $spawnable:expr, @$snapshot:literal) => {{
         // Take a reference for backwards compatibility with the vec-expecting insta filters.
-        let (snapshot, output) = $crate::common::run_and_format($spawnable, &$filters, false);
+        let (snapshot, output) = $crate::common::run_and_format($spawnable, &$filters, function_name!(), false);
         ::insta::assert_snapshot!(snapshot, @$snapshot);
         output
     }};
diff --git a/crates/uv/tests/pip_check.rs b/crates/uv/tests/pip_check.rs
index 3839b901f..28e2aecdd 100644
--- a/crates/uv/tests/pip_check.rs
+++ b/crates/uv/tests/pip_check.rs
@@ -1,8 +1,8 @@
 use std::process::Command;
 
 use anyhow::Result;
+use assert_fs::fixture::FileWriteStr;
 use assert_fs::fixture::PathChild;
-use assert_fs::fixture::{FileTouch, FileWriteStr};
 
 use common::uv_snapshot;
 
@@ -21,6 +21,7 @@ fn install_command(context: &TestContext) -> Command {
         .arg("--exclude-newer")
         .arg(EXCLUDE_NEWER)
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -41,6 +42,7 @@ fn check_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     command
@@ -51,7 +53,6 @@ fn check_compatible_packages() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("requests==2.31.0")?;
 
     uv_snapshot!(install_command(&context)
@@ -95,7 +96,6 @@ fn check_incompatible_packages() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("requests==2.31.0")?;
 
     uv_snapshot!(install_command(&context)
@@ -119,7 +119,6 @@ fn check_incompatible_packages() -> Result<()> {
     );
 
     let requirements_txt_idna = context.temp_dir.child("requirements_idna.txt");
-    requirements_txt_idna.touch()?;
     requirements_txt_idna.write_str("idna==2.4")?;
 
     uv_snapshot!(install_command(&context)
@@ -163,7 +162,6 @@ fn check_multiple_incompatible_packages() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("requests==2.31.0")?;
 
     uv_snapshot!(install_command(&context)
@@ -187,7 +185,6 @@ fn check_multiple_incompatible_packages() -> Result<()> {
     );
 
     let requirements_txt_two = context.temp_dir.child("requirements_two.txt");
-    requirements_txt_two.touch()?;
     requirements_txt_two.write_str("idna==2.4\nurllib3==1.20")?;
 
     uv_snapshot!(install_command(&context)
diff --git a/crates/uv/tests/pip_compile.rs b/crates/uv/tests/pip_compile.rs
index e86c8a971..22a04aeb6 100644
--- a/crates/uv/tests/pip_compile.rs
+++ b/crates/uv/tests/pip_compile.rs
@@ -419,6 +419,10 @@ authors = ["Astral Software Inc. <hey@astral.sh>"]
 [tool.poetry.dependencies]
 python = "^3.10"
 anyio = "^3"
+pytest = { version = "*", optional = true }
+
+[tool.poetry.extras]
+test = ["pytest"]
 
 [build-system]
 requires = ["poetry-core"]
@@ -427,20 +431,29 @@ build-backend = "poetry.core.masonry.api"
     )?;
 
     uv_snapshot!(context.compile()
-            .arg("pyproject.toml"), @r###"
+            .arg("pyproject.toml")
+            .arg("--extra")
+            .arg("test"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
-    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z pyproject.toml
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z pyproject.toml --extra test
     anyio==3.7.1
     idna==3.6
         # via anyio
+    iniconfig==2.0.0
+        # via pytest
+    packaging==24.0
+        # via pytest
+    pluggy==1.4.0
+        # via pytest
+    pytest==8.1.1
     sniffio==1.3.1
         # via anyio
 
     ----- stderr -----
-    Resolved 3 packages in [TIME]
+    Resolved 7 packages in [TIME]
     "###
     );
 
@@ -869,11 +882,8 @@ fn compile_python_37() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the requested Python version (3.7) does not satisfy Python>=3.8
-          and black==23.10.1 depends on Python>=3.8, we can conclude that
-          black==23.10.1 cannot be used.
-          And because you require black==23.10.1, we can conclude that the
-          requirements are unsatisfiable.
+      ╰─▶ Because the requested Python version (3.7) does not satisfy Python>=3.8 and black==23.10.1 depends on Python>=3.8, we can conclude that black==23.10.1 cannot be used.
+          And because you require black==23.10.1, we can conclude that the requirements are unsatisfiable.
     "###);
 
     Ok(())
@@ -1066,13 +1076,15 @@ fn compile_sdist_url_dependency() -> Result<()> {
     Ok(())
 }
 
-/// Resolve a specific Flask source distribution via a Git HTTPS dependency.
+/// Resolve a specific source distribution via a Git HTTPS dependency.
 #[test]
 #[cfg(feature = "git")]
 fn compile_git_https_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("flask @ git+https://github.com/pallets/flask.git")?;
+    requirements_in.write_str(
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage",
+    )?;
 
     // In addition to the standard filters, remove the `main` commit, which will change frequently.
     let filters: Vec<_> = [(r"@(\d|\w){40}", "@[COMMIT]")]
@@ -1087,113 +1099,23 @@ fn compile_git_https_dependency() -> Result<()> {
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
     #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    blinker==1.7.0
-        # via flask
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@[COMMIT]
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@[COMMIT]
 
     ----- stderr -----
-    Resolved 7 packages in [TIME]
+    Resolved 1 package in [TIME]
     "###);
 
     Ok(())
 }
 
-/// Resolve a specific Flask branch via a Git HTTPS dependency.
+/// Resolve a specific branch via a Git HTTPS dependency.
 #[test]
 #[cfg(feature = "git")]
 fn compile_git_branch_https_dependency() -> Result<()> {
-    let context = TestContext::new("3.12");
-    let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("flask @ git+https://github.com/pallets/flask.git@1.0.x")?;
-
-    uv_snapshot!(context.compile()
-            .arg("requirements.in"), @r###"
-    success: true
-    exit_code: 0
-    ----- stdout -----
-    # This file was autogenerated by uv via the following command:
-    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@d92b64aa275841b0c9aea3903aba72fbc4275d91
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
-
-    ----- stderr -----
-    Resolved 6 packages in [TIME]
-    "###
-    );
-
-    Ok(())
-}
-
-/// Resolve a specific Flask tag via a Git HTTPS dependency.
-#[test]
-#[cfg(feature = "git")]
-fn compile_git_tag_https_dependency() -> Result<()> {
-    let context = TestContext::new("3.12");
-    let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("flask @ git+https://github.com/pallets/flask.git@3.0.0")?;
-
-    uv_snapshot!(context.compile()
-            .arg("requirements.in"), @r###"
-    success: true
-    exit_code: 0
-    ----- stdout -----
-    # This file was autogenerated by uv via the following command:
-    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    blinker==1.7.0
-        # via flask
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@735a4701d6d5e848241e7d7535db898efb62d400
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
-
-    ----- stderr -----
-    Resolved 7 packages in [TIME]
-    "###
-    );
-
-    Ok(())
-}
-
-/// Resolve a specific Flask commit via a Git HTTPS dependency.
-#[test]
-#[cfg(feature = "git")]
-fn compile_git_long_commit_https_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str(
-        "flask @ git+https://github.com/pallets/flask.git@d92b64aa275841b0c9aea3903aba72fbc4275d91",
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@test-branch",
     )?;
 
     uv_snapshot!(context.compile()
@@ -1203,35 +1125,25 @@ fn compile_git_long_commit_https_dependency() -> Result<()> {
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
     #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@d92b64aa275841b0c9aea3903aba72fbc4275d91
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979
 
     ----- stderr -----
-    Resolved 6 packages in [TIME]
+    Resolved 1 package in [TIME]
     "###
     );
 
     Ok(())
 }
 
-/// Resolve a specific Flask commit via a Git HTTPS dependency.
+/// Resolve a specific tag via a Git HTTPS dependency.
 #[test]
 #[cfg(feature = "git")]
-fn compile_git_short_commit_https_dependency() -> Result<()> {
+fn compile_git_tag_https_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("flask @ git+https://github.com/pallets/flask.git@d92b64a")?;
+    requirements_in.write_str(
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@test-tag",
+    )?;
 
     uv_snapshot!(context.compile()
             .arg("requirements.in"), @r###"
@@ -1240,36 +1152,107 @@ fn compile_git_short_commit_https_dependency() -> Result<()> {
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
     #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@d92b64aa275841b0c9aea3903aba72fbc4275d91
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979
 
     ----- stderr -----
-    Resolved 6 packages in [TIME]
+    Resolved 1 package in [TIME]
     "###
     );
 
     Ok(())
 }
 
-/// Resolve a specific Flask ref via a Git HTTPS dependency.
+/// Resolve a specific tag via a Git HTTPS dependency.
+///
+/// In this case, the tag is a date, and thus could feasibly refer to a short commit hash.
+#[test]
+#[cfg(feature = "git")]
+fn compile_git_date_tag_https_dependency() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@20240402",
+    )?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a specific commit via a Git HTTPS dependency.
+#[test]
+#[cfg(feature = "git")]
+fn compile_git_long_commit_https_dependency() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979",
+    )?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a specific commit via a Git HTTPS dependency.
+#[test]
+#[cfg(feature = "git")]
+fn compile_git_short_commit_https_dependency() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(
+        "uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd6",
+    )?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@0dacfd662c64cb4ceb16e6cf65a157a8b715b979
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a specific ref via a Git HTTPS dependency.
 #[test]
 #[cfg(feature = "git")]
 fn compile_git_refs_https_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in
-        .write_str("flask @ git+https://github.com/pallets/flask.git@refs/pull/5313/head")?;
+        .write_str("uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@refs/pull/4/head")?;
 
     uv_snapshot!(context.compile()
             .arg("requirements.in"), @r###"
@@ -1278,24 +1261,10 @@ fn compile_git_refs_https_dependency() -> Result<()> {
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
     #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
-    blinker==1.7.0
-        # via flask
-    click==8.1.7
-        # via flask
-    flask @ git+https://github.com/pallets/flask.git@7af0271f4703a71beef8e26d1f5f6f8da04100e6
-    itsdangerous==2.1.2
-        # via flask
-    jinja2==3.1.3
-        # via flask
-    markupsafe==2.1.5
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1
-        # via flask
+    uv-public-pypackage @ git+https://github.com/astral-test/uv-public-pypackage@9d01a806f17ddacb9c7b66b1b68574adf790b63f
 
     ----- stderr -----
-    Resolved 7 packages in [TIME]
+    Resolved 1 package in [TIME]
     "###
     );
 
@@ -1486,9 +1455,7 @@ fn conflicting_direct_url_dependency() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because there is no version of werkzeug==3.0.0 and you require
-          werkzeug==3.0.0, we can conclude that the requirements are
-          unsatisfiable.
+      ╰─▶ Because there is no version of werkzeug==3.0.0 and you require werkzeug==3.0.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -1612,10 +1579,8 @@ fn conflicting_transitive_url_dependency() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because only werkzeug<3.0.0 is available and flask==3.0.0 depends on
-          werkzeug>=3.0.0, we can conclude that flask==3.0.0 cannot be used.
-          And because you require flask==3.0.0, we can conclude that the
-          requirements are unsatisfiable.
+      ╰─▶ Because only werkzeug<3.0.0 is available and flask==3.0.0 depends on werkzeug>=3.0.0, we can conclude that flask==3.0.0 cannot be used.
+          And because you require flask==3.0.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -1964,8 +1929,7 @@ fn requirement_constraint_override_url() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because there is no version of anyio==3.7.0 and you require
-          anyio==3.7.0, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because there is no version of anyio==3.7.0 and you require anyio==3.7.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -2177,8 +2141,7 @@ dependencies = ["anyio==3.7.0", "anyio==4.0.0"]
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because my-project depends on anyio==3.7.0 and my-project depends on
-          anyio==4.0.0, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because my-project depends on anyio==3.7.0 and my-project depends on anyio==4.0.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -2209,8 +2172,7 @@ dependencies = ["anyio==300.1.4"]
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because there is no version of anyio==300.1.4 and my-project depends on
-          anyio==300.1.4, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because there is no version of anyio==300.1.4 and my-project depends on anyio==300.1.4, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -2235,6 +2197,7 @@ fn compile_exclude_newer() -> Result<()> {
             .arg("--cache-dir")
             .arg(context.cache_dir.path())
             .env("VIRTUAL_ENV", context.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(context.temp_dir.path()), @r###"
     success: true
     exit_code: 0
@@ -2259,6 +2222,7 @@ fn compile_exclude_newer() -> Result<()> {
             .arg("--cache-dir")
             .arg(context.cache_dir.path())
             .env("VIRTUAL_ENV", context.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(context.temp_dir.path()), @r###"
     success: true
     exit_code: 0
@@ -2282,6 +2246,7 @@ fn compile_exclude_newer() -> Result<()> {
             .arg("--cache-dir")
             .arg(context.cache_dir.path())
             .env("VIRTUAL_ENV", context.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(context.temp_dir.path()), @r###"
     success: false
     exit_code: 2
@@ -2656,11 +2621,8 @@ fn compile_yanked_version_indirect() -> Result<()> {
               attrs<=20.3.0
               attrs==21.1.0
               attrs>=21.2.0
-          and attrs==21.1.0 is unusable because it was yanked (reason:
-          Installable but not importable on Python 3.4), we can conclude that
-          attrs>20.3.0,<21.2.0 cannot be used.
-          And because you require attrs>20.3.0,<21.2.0, we can conclude that the
-          requirements are unsatisfiable.
+          and attrs==21.1.0 is unusable because it was yanked (reason: Installable but not importable on Python 3.4), we can conclude that attrs>20.3.0,<21.2.0 cannot be used.
+          And because you require attrs>20.3.0,<21.2.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -2755,6 +2717,90 @@ fn override_multi_dependency() -> Result<()> {
     Ok(())
 }
 
+/// Flask==3.0.0 depends on Werkzeug>=3.0.0. Demonstrate that we can override this
+/// requirement with a URL.
+#[test]
+fn override_dependency_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("flask==3.0.0")?;
+
+    let overrides_txt = context.temp_dir.child("overrides.txt");
+    overrides_txt.write_str("werkzeug @ https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl")?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--override")
+            .arg("overrides.txt"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --override overrides.txt
+    blinker==1.7.0
+        # via flask
+    click==8.1.7
+        # via flask
+    flask==3.0.0
+    itsdangerous==2.1.2
+        # via flask
+    jinja2==3.1.3
+        # via flask
+    markupsafe==2.1.5
+        # via jinja2
+    werkzeug @ https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl
+        # via flask
+
+    ----- stderr -----
+    Resolved 7 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Flask==3.0.0 depends on Werkzeug>=3.0.0. Demonstrate that we can override this
+/// requirement with an unnamed URL.
+#[test]
+fn override_dependency_unnamed_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("flask==3.0.0")?;
+
+    let overrides_txt = context.temp_dir.child("overrides.txt");
+    overrides_txt.write_str("https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl")?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--override")
+            .arg("overrides.txt"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --override overrides.txt
+    blinker==1.7.0
+        # via flask
+    click==8.1.7
+        # via flask
+    flask==3.0.0
+    itsdangerous==2.1.2
+        # via flask
+    jinja2==3.1.3
+        # via flask
+    markupsafe==2.1.5
+        # via jinja2
+    werkzeug @ https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl
+        # via flask
+
+    ----- stderr -----
+    Resolved 7 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
 /// Request an extra that doesn't exist on the specified package.
 #[test]
 fn missing_registry_extra() -> Result<()> {
@@ -3124,6 +3170,56 @@ fn compile_editable() -> Result<()> {
     Ok(())
 }
 
+/// If an editable is repeated, it should only be built once.
+#[test]
+fn deduplicate_editable() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(indoc! {r"
+        -e file://../../scripts/packages/black_editable
+        -e ${PROJECT_ROOT}/../../scripts/packages/black_editable
+        -e file://../../scripts/packages/black_editable[dev]
+        "
+    })?;
+
+    uv_snapshot!(context.filters(), context.compile()
+        .arg(requirements_in.path())
+        .current_dir(current_dir()?), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z [TEMP_DIR]/requirements.in
+    -e file://../../scripts/packages/black_editable
+    aiohttp==3.9.3
+        # via black
+    aiosignal==1.3.1
+        # via aiohttp
+    attrs==23.2.0
+        # via aiohttp
+    frozenlist==1.4.1
+        # via
+        #   aiohttp
+        #   aiosignal
+    idna==3.6
+        # via yarl
+    multidict==6.0.5
+        # via
+        #   aiohttp
+        #   yarl
+    uvloop==0.19.0
+        # via black
+    yarl==1.9.4
+        # via aiohttp
+
+    ----- stderr -----
+    Built 1 editable in [TIME]
+    Resolved 9 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
 #[test]
 fn recursive_extras_direct_url() -> Result<()> {
     let context = TestContext::new("3.12");
@@ -3309,6 +3405,7 @@ fn compile_html() -> Result<()> {
             .arg("--index-url")
             .arg("https://download.pytorch.org/whl")
             .env("VIRTUAL_ENV", context.venv.as_os_str())
+            .env("UV_NO_WRAP", "1")
             .current_dir(context.temp_dir.path()), @r###"
     success: true
     exit_code: 0
@@ -3434,33 +3531,14 @@ fn compile_legacy_sdist_setuptools() -> Result<()> {
     Ok(())
 }
 
-/// Include hashes in the generated output.
+/// Include hashes from the registry in the generated output.
 #[test]
-fn generate_hashes() -> Result<()> {
+fn generate_hashes_registry() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("flask==3.0.0")?;
+    requirements_in.write_str("anyio==4.0.0")?;
 
-    let colorama_locked = regex::escape(indoc! {r"
-        colorama==0.4.6 \
-            --hash=sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44 \
-            --hash=sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6
-            # via click
-    "});
-    let filters: Vec<_> = if cfg!(windows) {
-        // Remove colorama
-        vec![
-            (colorama_locked.as_str(), ""),
-            ("Resolved 8 packages", "Resolved 7 packages"),
-        ]
-    } else {
-        vec![]
-    }
-    .into_iter()
-    .chain(context.filters())
-    .collect();
-
-    uv_snapshot!(filters, context.compile()
+    uv_snapshot!(context.compile()
         .arg("requirements.in")
         .arg("--generate-hashes"), @r###"
     success: true
@@ -3468,102 +3546,246 @@ fn generate_hashes() -> Result<()> {
     ----- stdout -----
     # This file was autogenerated by uv via the following command:
     #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --generate-hashes
-    blinker==1.7.0 \
-        --hash=sha256:c3f865d4d54db7abc53758a01601cf343fe55b84c1de4e3fa910e420b438d5b9 \
-        --hash=sha256:e6820ff6fa4e4d1d8e2747c2283749c3f547e4fee112b98555cdcdae32996182
-        # via flask
-    click==8.1.7 \
-        --hash=sha256:ae74fb96c20a0277a1d615f1e4d73c8414f5a98db8b799a7931d1582f3390c28 \
-        --hash=sha256:ca9853ad459e787e2192211578cc907e7594e294c7ccc834310722b41b9ca6de
-        # via flask
-    flask==3.0.0 \
-        --hash=sha256:21128f47e4e3b9d597a3e8521a329bf56909b690fcc3fa3e477725aa81367638 \
-        --hash=sha256:cfadcdb638b609361d29ec22360d6070a77d7463dcb3ab08d2c2f2f168845f58
-    itsdangerous==2.1.2 \
-        --hash=sha256:2c2349112351b88699d8d4b6b075022c0808887cb7ad10069318a8b0bc88db44 \
-        --hash=sha256:5dbbc68b317e5e42f327f9021763545dc3fc3bfe22e6deb96aaf1fc38874156a
-        # via flask
-    jinja2==3.1.3 \
-        --hash=sha256:7d6d50dd97d52cbc355597bd845fabfbac3f551e1f99619e39a35ce8c370b5fa \
-        --hash=sha256:ac8bd6544d4bb2c9792bf3a159e80bba8fda7f07e81bc3aed565432d5925ba90
-        # via flask
-    markupsafe==2.1.5 \
-        --hash=sha256:00e046b6dd71aa03a41079792f8473dc494d564611a8f89bbbd7cb93295ebdcf \
-        --hash=sha256:075202fa5b72c86ad32dc7d0b56024ebdbcf2048c0ba09f1cde31bfdd57bcfff \
-        --hash=sha256:0e397ac966fdf721b2c528cf028494e86172b4feba51d65f81ffd65c63798f3f \
-        --hash=sha256:17b950fccb810b3293638215058e432159d2b71005c74371d784862b7e4683f3 \
-        --hash=sha256:1f3fbcb7ef1f16e48246f704ab79d79da8a46891e2da03f8783a5b6fa41a9532 \
-        --hash=sha256:2174c595a0d73a3080ca3257b40096db99799265e1c27cc5a610743acd86d62f \
-        --hash=sha256:2b7c57a4dfc4f16f7142221afe5ba4e093e09e728ca65c51f5620c9aaeb9a617 \
-        --hash=sha256:2d2d793e36e230fd32babe143b04cec8a8b3eb8a3122d2aceb4a371e6b09b8df \
-        --hash=sha256:30b600cf0a7ac9234b2638fbc0fb6158ba5bdcdf46aeb631ead21248b9affbc4 \
-        --hash=sha256:397081c1a0bfb5124355710fe79478cdbeb39626492b15d399526ae53422b906 \
-        --hash=sha256:3a57fdd7ce31c7ff06cdfbf31dafa96cc533c21e443d57f5b1ecc6cdc668ec7f \
-        --hash=sha256:3c6b973f22eb18a789b1460b4b91bf04ae3f0c4234a0a6aa6b0a92f6f7b951d4 \
-        --hash=sha256:3e53af139f8579a6d5f7b76549125f0d94d7e630761a2111bc431fd820e163b8 \
-        --hash=sha256:4096e9de5c6fdf43fb4f04c26fb114f61ef0bf2e5604b6ee3019d51b69e8c371 \
-        --hash=sha256:4275d846e41ecefa46e2015117a9f491e57a71ddd59bbead77e904dc02b1bed2 \
-        --hash=sha256:4c31f53cdae6ecfa91a77820e8b151dba54ab528ba65dfd235c80b086d68a465 \
-        --hash=sha256:4f11aa001c540f62c6166c7726f71f7573b52c68c31f014c25cc7901deea0b52 \
-        --hash=sha256:5049256f536511ee3f7e1b3f87d1d1209d327e818e6ae1365e8653d7e3abb6a6 \
-        --hash=sha256:58c98fee265677f63a4385256a6d7683ab1832f3ddd1e66fe948d5880c21a169 \
-        --hash=sha256:598e3276b64aff0e7b3451b72e94fa3c238d452e7ddcd893c3ab324717456bad \
-        --hash=sha256:5b7b716f97b52c5a14bffdf688f971b2d5ef4029127f1ad7a513973cfd818df2 \
-        --hash=sha256:5dedb4db619ba5a2787a94d877bc8ffc0566f92a01c0ef214865e54ecc9ee5e0 \
-        --hash=sha256:619bc166c4f2de5caa5a633b8b7326fbe98e0ccbfacabd87268a2b15ff73a029 \
-        --hash=sha256:629ddd2ca402ae6dbedfceeba9c46d5f7b2a61d9749597d4307f943ef198fc1f \
-        --hash=sha256:656f7526c69fac7f600bd1f400991cc282b417d17539a1b228617081106feb4a \
-        --hash=sha256:6ec585f69cec0aa07d945b20805be741395e28ac1627333b1c5b0105962ffced \
-        --hash=sha256:72b6be590cc35924b02c78ef34b467da4ba07e4e0f0454a2c5907f473fc50ce5 \
-        --hash=sha256:7502934a33b54030eaf1194c21c692a534196063db72176b0c4028e140f8f32c \
-        --hash=sha256:7a68b554d356a91cce1236aa7682dc01df0edba8d043fd1ce607c49dd3c1edcf \
-        --hash=sha256:7b2e5a267c855eea6b4283940daa6e88a285f5f2a67f2220203786dfa59b37e9 \
-        --hash=sha256:823b65d8706e32ad2df51ed89496147a42a2a6e01c13cfb6ffb8b1e92bc910bb \
-        --hash=sha256:8590b4ae07a35970728874632fed7bd57b26b0102df2d2b233b6d9d82f6c62ad \
-        --hash=sha256:8dd717634f5a044f860435c1d8c16a270ddf0ef8588d4887037c5028b859b0c3 \
-        --hash=sha256:8dec4936e9c3100156f8a2dc89c4b88d5c435175ff03413b443469c7c8c5f4d1 \
-        --hash=sha256:97cafb1f3cbcd3fd2b6fbfb99ae11cdb14deea0736fc2b0952ee177f2b813a46 \
-        --hash=sha256:a17a92de5231666cfbe003f0e4b9b3a7ae3afb1ec2845aadc2bacc93ff85febc \
-        --hash=sha256:a549b9c31bec33820e885335b451286e2969a2d9e24879f83fe904a5ce59d70a \
-        --hash=sha256:ac07bad82163452a6884fe8fa0963fb98c2346ba78d779ec06bd7a6262132aee \
-        --hash=sha256:ae2ad8ae6ebee9d2d94b17fb62763125f3f374c25618198f40cbb8b525411900 \
-        --hash=sha256:b91c037585eba9095565a3556f611e3cbfaa42ca1e865f7b8015fe5c7336d5a5 \
-        --hash=sha256:bc1667f8b83f48511b94671e0e441401371dfd0f0a795c7daa4a3cd1dde55bea \
-        --hash=sha256:bec0a414d016ac1a18862a519e54b2fd0fc8bbfd6890376898a6c0891dd82e9f \
-        --hash=sha256:bf50cd79a75d181c9181df03572cdce0fbb75cc353bc350712073108cba98de5 \
-        --hash=sha256:bff1b4290a66b490a2f4719358c0cdcd9bafb6b8f061e45c7a2460866bf50c2e \
-        --hash=sha256:c061bb86a71b42465156a3ee7bd58c8c2ceacdbeb95d05a99893e08b8467359a \
-        --hash=sha256:c8b29db45f8fe46ad280a7294f5c3ec36dbac9491f2d1c17345be8e69cc5928f \
-        --hash=sha256:ce409136744f6521e39fd8e2a24c53fa18ad67aa5bc7c2cf83645cce5b5c4e50 \
-        --hash=sha256:d050b3361367a06d752db6ead6e7edeb0009be66bc3bae0ee9d97fb326badc2a \
-        --hash=sha256:d283d37a890ba4c1ae73ffadf8046435c76e7bc2247bbb63c00bd1a709c6544b \
-        --hash=sha256:d9fad5155d72433c921b782e58892377c44bd6252b5af2f67f16b194987338a4 \
-        --hash=sha256:daa4ee5a243f0f20d528d939d06670a298dd39b1ad5f8a72a4275124a7819eff \
-        --hash=sha256:db0b55e0f3cc0be60c1f19efdde9a637c32740486004f20d1cff53c3c0ece4d2 \
-        --hash=sha256:e61659ba32cf2cf1481e575d0462554625196a1f2fc06a1c777d3f48e8865d46 \
-        --hash=sha256:ea3d8a3d18833cf4304cd2fc9cbb1efe188ca9b5efef2bdac7adc20594a0e46b \
-        --hash=sha256:ec6a563cff360b50eed26f13adc43e61bc0c04d94b8be985e6fb24b81f6dcfdf \
-        --hash=sha256:f5dfb42c4604dddc8e4305050aa6deb084540643ed5804d7455b5df8fe16f5e5 \
-        --hash=sha256:fa173ec60341d6bb97a89f5ea19c85c5643c1e7dedebc22f5181eb73573142c5 \
-        --hash=sha256:fa9db3f79de01457b03d4f01b34cf91bc0048eb2c3846ff26f66687c2f6d16ab \
-        --hash=sha256:fce659a462a1be54d2ffcacea5e3ba2d74daa74f30f5f143fe0c58636e355fdd \
-        --hash=sha256:ffee1f21e5ef0d712f9033568f8344d5da8cc2869dbd08d87c84656e6a2d2f68
-        # via
-        #   jinja2
-        #   werkzeug
-    werkzeug==3.0.1 \
-        --hash=sha256:507e811ecea72b18a404947aded4b3390e1db8f826b494d76550ef45bb3b1dcc \
-        --hash=sha256:90a285dc0e42ad56b34e696398b8122ee4c681833fb35b8334a095d82c56da10
-        # via flask
+    anyio==4.0.0 \
+        --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f \
+        --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
 
     ----- stderr -----
-    Resolved 7 packages in [TIME]
+    Resolved 3 packages in [TIME]
     "###
     );
 
     Ok(())
 }
 
+/// Include hashes from the URL in the generated output.
+#[test]
+fn generate_hashes_source_distribution_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("anyio @ https://files.pythonhosted.org/packages/2d/b8/7333d87d5f03247215d86a86362fd3e324111788c6cdd8d2e6196a6ba833/anyio-4.2.0.tar.gz")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --generate-hashes
+    anyio @ https://files.pythonhosted.org/packages/2d/b8/7333d87d5f03247215d86a86362fd3e324111788c6cdd8d2e6196a6ba833/anyio-4.2.0.tar.gz \
+        --hash=sha256:e1875bb4b4e2de1669f4bc7869b6d3f54231cdced71605e6e64c9be77e3be50f
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include hashes from the URL in the generated output.
+#[test]
+fn generate_hashes_built_distribution_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("anyio @ https://files.pythonhosted.org/packages/14/fd/2f20c40b45e4fb4324834aea24bd4afdf1143390242c0b33774da0e2e34f/anyio-4.3.0-py3-none-any.whl")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --generate-hashes
+    anyio @ https://files.pythonhosted.org/packages/14/fd/2f20c40b45e4fb4324834aea24bd4afdf1143390242c0b33774da0e2e34f/anyio-4.3.0-py3-none-any.whl \
+        --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Given a VCS dependency, include hashes for its dependencies, but not the repository itself.
+#[test]
+fn generate_hashes_git() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("anyio @ git+https://github.com/agronholm/anyio@4.3.0")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --generate-hashes
+    anyio @ git+https://github.com/agronholm/anyio@437a7e310925a962cab4a58fcd2455fbcd578d51
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Given an unnamed URL, include hashes for the URL and its dependencies.
+#[test]
+fn generate_hashes_unnamed_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("https://files.pythonhosted.org/packages/14/fd/2f20c40b45e4fb4324834aea24bd4afdf1143390242c0b33774da0e2e34f/anyio-4.3.0-py3-none-any.whl")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --generate-hashes
+    anyio @ https://files.pythonhosted.org/packages/14/fd/2f20c40b45e4fb4324834aea24bd4afdf1143390242c0b33774da0e2e34f/anyio-4.3.0-py3-none-any.whl \
+        --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Given a local directory, include hashes for its dependencies, but not the directory itself.
+#[test]
+fn generate_hashes_local_directory() -> Result<()> {
+    let _context = TestContext::new("3.12");
+
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(indoc! {r"
+        ../../scripts/packages/poetry_editable
+        "
+    })?;
+
+    uv_snapshot!(context.filters(), context.compile()
+        .arg(requirements_in.path())
+        .arg("--generate-hashes")
+        .current_dir(current_dir()?), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z [TEMP_DIR]/requirements.in --generate-hashes
+    anyio==4.3.0 \
+        --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8 \
+        --hash=sha256:f75253795a87df48568485fd18cdd2a3fa5c4f7c5be8e5e36637733fce06fed6
+        # via poetry-editable
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    poetry-editable @ ../../scripts/packages/poetry_editable
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 4 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
+/// Given an editable dependency, include hashes for its dependencies, but not the directory itself.
+#[test]
+fn generate_hashes_editable() -> Result<()> {
+    let _context = TestContext::new("3.12");
+
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(indoc! {r"
+        -e ../../scripts/packages/poetry_editable
+        "
+    })?;
+
+    uv_snapshot!(context.filters(), context.compile()
+        .arg(requirements_in.path())
+        .arg("--generate-hashes")
+        .current_dir(current_dir()?), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z [TEMP_DIR]/requirements.in --generate-hashes
+    -e ../../scripts/packages/poetry_editable
+    anyio==4.3.0 \
+        --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8 \
+        --hash=sha256:f75253795a87df48568485fd18cdd2a3fa5c4f7c5be8e5e36637733fce06fed6
+        # via poetry-editable
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Built 1 editable in [TIME]
+    Resolved 4 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
 /// Compile using `--find-links` with a local directory.
 #[test]
 fn find_links_directory() -> Result<()> {
@@ -3578,7 +3800,7 @@ fn find_links_directory() -> Result<()> {
     uv_snapshot!(context.filters(), context.compile()
             .arg("requirements.in")
             .arg("--find-links")
-            .arg(context.workspace_root.join("scripts").join("wheels")), @r###"
+            .arg(context.workspace_root.join("scripts").join("links")), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -4203,12 +4425,9 @@ fn no_index_requirements_txt() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because tqdm was not found in the provided package locations and you
-          require tqdm, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because tqdm was not found in the provided package locations and you require tqdm, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -4297,9 +4516,9 @@ fn matching_index_urls_requirements_txt() -> Result<()> {
     Ok(())
 }
 
-/// Resolve without network access via the `--offline` flag.
+/// Resolve a registry package without network access via the `--offline` flag.
 #[test]
-fn offline() -> Result<()> {
+fn offline_registry() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str("black==23.10.1")?;
@@ -4314,8 +4533,7 @@ fn offline() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because black==23.10.1 was not found in the cache and you require
-          black==23.10.1, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because black==23.10.1 was not found in the cache and you require black==23.10.1, we can conclude that the requirements are unsatisfiable.
 
           hint: Packages were unavailable because the network was disabled
     "###
@@ -4375,8 +4593,53 @@ fn offline() -> Result<()> {
     Ok(())
 }
 
-/// Resolve without network access via the `--offline` flag, using `--find-links` for an HTML
-/// registry.
+/// Resolve a registry package without network access via the `--offline` flag. We should backtrack
+/// to the latest version of the package that's available in the cache.
+#[test]
+fn offline_registry_backtrack() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("iniconfig==1.1.1")?;
+
+    // Populate the cache.
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    iniconfig==1.1.1
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    // Resolve with `--offline`, with a looser requirement. We should backtrack to `1.1.1`.
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("iniconfig")?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--offline"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --offline
+    iniconfig==1.1.1
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a package without network access via the `--offline` flag, using `--find-links` for an
+/// HTML registry.
 #[test]
 fn offline_find_links() -> Result<()> {
     let context = TestContext::new("3.12");
@@ -4397,8 +4660,7 @@ fn offline_find_links() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because tqdm was not found in the cache and you require tqdm, we can
-          conclude that the requirements are unsatisfiable.
+      ╰─▶ Because tqdm was not found in the cache and you require tqdm, we can conclude that the requirements are unsatisfiable.
 
           hint: Packages were unavailable because the network was disabled
     "###
@@ -4417,8 +4679,7 @@ fn offline_find_links() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because tqdm was not found in the cache and you require tqdm, we can
-          conclude that the requirements are unsatisfiable.
+      ╰─▶ Because tqdm was not found in the cache and you require tqdm, we can conclude that the requirements are unsatisfiable.
 
           hint: Packages were unavailable because the network was disabled
     "###
@@ -4427,6 +4688,152 @@ fn offline_find_links() -> Result<()> {
     Ok(())
 }
 
+/// Resolve a direct URL package without network access via the `--offline` flag.
+#[test]
+fn offline_direct_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl")?;
+
+    // Resolve with `--offline` with an empty cache.
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--offline"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download: iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl
+      Caused by: Network connectivity is disabled, but the requested data wasn't found in the cache for: `https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl`
+    "###
+    );
+
+    // Populate the cache.
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    // Resolve with `--offline` with a populated cache.
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--offline"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --offline
+    iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a package with invalid metadata, by way of an invalid `Requires-Python` field in the
+/// `METADATA` file.
+#[test]
+fn invalid_metadata_requires_python() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("validation==2.0.0")?;
+
+    // `2.0.0` has invalid metadata.
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--no-index")
+            .arg("--find-links")
+            .arg(context.workspace_root.join("scripts").join("links")), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+      × No solution found when resolving dependencies:
+      ╰─▶ Because validation==2.0.0 is unusable because the package metadata could not be parsed and you require validation==2.0.0, we can conclude that the requirements are unsatisfiable.
+
+          hint: Metadata for validation==2.0.0 could not be parsed:
+            Failed to parse version: Unexpected end of version specifier, expected operator:
+            12
+            ^^
+
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a package with multiple `.dist-info` directories.
+#[test]
+fn invalid_metadata_multiple_dist_info() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("validation==3.0.0")?;
+
+    // `3.0.0` has an invalid structure (multiple `.dist-info` directories).
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--no-index")
+            .arg("--find-links")
+            .arg(context.workspace_root.join("scripts").join("links")), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+      × No solution found when resolving dependencies:
+      ╰─▶ Because validation==3.0.0 is unusable because the package has an invalid format and you require validation==3.0.0, we can conclude that the requirements are unsatisfiable.
+
+          hint: The structure of validation==3.0.0 was invalid:
+            Multiple .dist-info directories found: validation-2.0.0, validation-3.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Resolve a package, but backtrack past versions with invalid metadata.
+#[test]
+fn invalid_metadata_backtrack() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("validation")?;
+
+    // `2.0.0` and `3.0.0` have invalid metadata. We should backtrack to `1.0.0` (the preceding
+    // version, which has valid metadata).
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--no-index")
+            .arg("--find-links")
+            .arg(context.workspace_root.join("scripts").join("links")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --no-index
+    validation==1.0.0
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
 /// Resolve nested `-r` requirements files with relative paths.
 #[test]
 fn compile_relative_subfile() -> Result<()> {
@@ -4606,8 +5013,7 @@ fn compile_constraints_incompatible_url() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because only anyio>=4 is available and you require anyio<4, we can
-          conclude that the requirements are unsatisfiable.
+      ╰─▶ Because only anyio>=4 is available and you require anyio<4, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -4630,8 +5036,7 @@ fn index_url_in_requirements() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because anyio<4 was not found in the package registry and you require
-          anyio<4, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because anyio<4 was not found in the package registry and you require anyio<4, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -4965,8 +5370,7 @@ fn compile_constraints_incompatible_version() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because you require filelock==1.0.0 and you require filelock==3.8.0, we
-          can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because you require filelock==1.0.0 and you require filelock==3.8.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -4994,8 +5398,7 @@ fn conflicting_url_markers() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because you require filelock==1.0.0 and you require filelock==3.8.0, we
-          can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because you require filelock==1.0.0 and you require filelock==3.8.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -5143,8 +5546,7 @@ fn override_with_incompatible_constraint() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because you require anyio>=3.0.0 and you require anyio<3.0.0, we can
-          conclude that the requirements are unsatisfiable.
+      ╰─▶ Because you require anyio>=3.0.0 and you require anyio<3.0.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -5595,14 +5997,14 @@ requires-python = "<=3.8"
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str(&format!("-e {}", editable_dir.path().display()))?;
 
-    uv_snapshot!(context.compile()
+    uv_snapshot!(context.filters(), context.compile()
         .arg("requirements.in"), @r###"
     success: false
     exit_code: 2
     ----- stdout -----
 
     ----- stderr -----
-    error: Editable `example` requires Python <=3.8, but resolution targets Python 3.12.1
+    error: Editable `example` requires Python <=3.8, but resolution targets Python 3.12.[X]
     "###
     );
 
@@ -5807,6 +6209,7 @@ fn no_stream() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -5825,6 +6228,28 @@ fn no_stream() -> Result<()> {
     Ok(())
 }
 
+/// Resolve a direct URL package with a URL that doesn't exist (i.e., returns a 404).
+#[test]
+fn not_found_direct_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("iniconfig @ https://files.pythonhosted.org/packages/ef/a6/fake/iniconfig-2.0.0-py3-none-any.whl")?;
+
+    uv_snapshot!(context.compile()
+            .arg("requirements.in"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download: iniconfig @ https://files.pythonhosted.org/packages/ef/a6/fake/iniconfig-2.0.0-py3-none-any.whl
+      Caused by: HTTP status client error (404 Not Found) for url (https://files.pythonhosted.org/packages/ef/a6/fake/iniconfig-2.0.0-py3-none-any.whl)
+    "###
+    );
+
+    Ok(())
+}
+
 /// Raise an error when a direct URL dependency's `Requires-Python` constraint is not met.
 #[test]
 fn requires_python_direct_url() -> Result<()> {
@@ -5849,7 +6274,7 @@ requires-python = "<=3.8"
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str(&format!("example @ {}", editable_dir.path().display()))?;
 
-    uv_snapshot!(context.compile()
+    uv_snapshot!(context.filters(), context.compile()
         .arg("requirements.in"), @r###"
     success: false
     exit_code: 1
@@ -5857,11 +6282,8 @@ requires-python = "<=3.8"
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.12.1) does not satisfy Python<=3.8
-          and example==0.0.0 depends on Python<=3.8, we can conclude that
-          example==0.0.0 cannot be used.
-          And because only example==0.0.0 is available and you require example, we
-          can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because the current Python version (3.12.[X]) does not satisfy Python<=3.8 and example==0.0.0 depends on Python<=3.8, we can conclude that example==0.0.0 cannot be used.
+          And because only example==0.0.0 is available and you require example, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -6085,6 +6507,93 @@ fn preserve_hashes_upgrade() -> Result<()> {
     Ok(())
 }
 
+/// `--generate-hashes` should update the hashes in the "lockfile" if the package does not have
+/// hashes, even if `--upgrade` is _not_ specified.
+#[test]
+fn preserve_hashes_no_existing_hashes() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("markupsafe")?;
+
+    // Write a subset of the hashes to the "lockfile".
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc! {r"
+        # This file was autogenerated by uv via the following command:
+        #    uv pip compile requirements.in --python-version 3.12 --cache-dir [CACHE_DIR]
+        markupsafe==2.1.2
+    "})?;
+
+    // Add additional hashes to the "lockfile".
+    uv_snapshot!(context.compile()
+            .arg("requirements.in")
+            .arg("--output-file")
+            .arg("requirements.txt")
+            .arg("--generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --output-file requirements.txt --generate-hashes
+    markupsafe==2.1.2 \
+        --hash=sha256:0576fe974b40a400449768941d5d0858cc624e3249dfd1e0c33674e5c7ca7aed \
+        --hash=sha256:085fd3201e7b12809f9e6e9bc1e5c96a368c8523fad5afb02afe3c051ae4afcc \
+        --hash=sha256:090376d812fb6ac5f171e5938e82e7f2d7adc2b629101cec0db8b267815c85e2 \
+        --hash=sha256:0b462104ba25f1ac006fdab8b6a01ebbfbce9ed37fd37fd4acd70c67c973e460 \
+        --hash=sha256:137678c63c977754abe9086a3ec011e8fd985ab90631145dfb9294ad09c102a7 \
+        --hash=sha256:1bea30e9bf331f3fef67e0a3877b2288593c98a21ccb2cf29b74c581a4eb3af0 \
+        --hash=sha256:22152d00bf4a9c7c83960521fc558f55a1adbc0631fbb00a9471e097b19d72e1 \
+        --hash=sha256:22731d79ed2eb25059ae3df1dfc9cb1546691cc41f4e3130fe6bfbc3ecbbecfa \
+        --hash=sha256:2298c859cfc5463f1b64bd55cb3e602528db6fa0f3cfd568d3605c50678f8f03 \
+        --hash=sha256:28057e985dace2f478e042eaa15606c7efccb700797660629da387eb289b9323 \
+        --hash=sha256:2e7821bffe00aa6bd07a23913b7f4e01328c3d5cc0b40b36c0bd81d362faeb65 \
+        --hash=sha256:2ec4f2d48ae59bbb9d1f9d7efb9236ab81429a764dedca114f5fdabbc3788013 \
+        --hash=sha256:340bea174e9761308703ae988e982005aedf427de816d1afe98147668cc03036 \
+        --hash=sha256:40627dcf047dadb22cd25ea7ecfe9cbf3bbbad0482ee5920b582f3809c97654f \
+        --hash=sha256:40dfd3fefbef579ee058f139733ac336312663c6706d1163b82b3003fb1925c4 \
+        --hash=sha256:4cf06cdc1dda95223e9d2d3c58d3b178aa5dacb35ee7e3bbac10e4e1faacb419 \
+        --hash=sha256:50c42830a633fa0cf9e7d27664637532791bfc31c731a87b202d2d8ac40c3ea2 \
+        --hash=sha256:55f44b440d491028addb3b88f72207d71eeebfb7b5dbf0643f7c023ae1fba619 \
+        --hash=sha256:608e7073dfa9e38a85d38474c082d4281f4ce276ac0010224eaba11e929dd53a \
+        --hash=sha256:63ba06c9941e46fa389d389644e2d8225e0e3e5ebcc4ff1ea8506dce646f8c8a \
+        --hash=sha256:65608c35bfb8a76763f37036547f7adfd09270fbdbf96608be2bead319728fcd \
+        --hash=sha256:665a36ae6f8f20a4676b53224e33d456a6f5a72657d9c83c2aa00765072f31f7 \
+        --hash=sha256:6d6607f98fcf17e534162f0709aaad3ab7a96032723d8ac8750ffe17ae5a0666 \
+        --hash=sha256:7313ce6a199651c4ed9d7e4cfb4aa56fe923b1adf9af3b420ee14e6d9a73df65 \
+        --hash=sha256:7668b52e102d0ed87cb082380a7e2e1e78737ddecdde129acadb0eccc5423859 \
+        --hash=sha256:7df70907e00c970c60b9ef2938d894a9381f38e6b9db73c5be35e59d92e06625 \
+        --hash=sha256:7e007132af78ea9df29495dbf7b5824cb71648d7133cf7848a2a5dd00d36f9ff \
+        --hash=sha256:835fb5e38fd89328e9c81067fd642b3593c33e1e17e2fdbf77f5676abb14a156 \
+        --hash=sha256:8bca7e26c1dd751236cfb0c6c72d4ad61d986e9a41bbf76cb445f69488b2a2bd \
+        --hash=sha256:8db032bf0ce9022a8e41a22598eefc802314e81b879ae093f36ce9ddf39ab1ba \
+        --hash=sha256:99625a92da8229df6d44335e6fcc558a5037dd0a760e11d84be2260e6f37002f \
+        --hash=sha256:9cad97ab29dfc3f0249b483412c85c8ef4766d96cdf9dcf5a1e3caa3f3661cf1 \
+        --hash=sha256:a4abaec6ca3ad8660690236d11bfe28dfd707778e2442b45addd2f086d6ef094 \
+        --hash=sha256:a6e40afa7f45939ca356f348c8e23048e02cb109ced1eb8420961b2f40fb373a \
+        --hash=sha256:a6f2fcca746e8d5910e18782f976489939d54a91f9411c32051b4aab2bd7c513 \
+        --hash=sha256:a806db027852538d2ad7555b203300173dd1b77ba116de92da9afbc3a3be3eed \
+        --hash=sha256:abcabc8c2b26036d62d4c746381a6f7cf60aafcc653198ad678306986b09450d \
+        --hash=sha256:b8526c6d437855442cdd3d87eede9c425c4445ea011ca38d937db299382e6fa3 \
+        --hash=sha256:bb06feb762bade6bf3c8b844462274db0c76acc95c52abe8dbed28ae3d44a147 \
+        --hash=sha256:c0a33bc9f02c2b17c3ea382f91b4db0e6cde90b63b296422a939886a7a80de1c \
+        --hash=sha256:c4a549890a45f57f1ebf99c067a4ad0cb423a05544accaf2b065246827ed9603 \
+        --hash=sha256:ca244fa73f50a800cf8c3ebf7fd93149ec37f5cb9596aa8873ae2c1d23498601 \
+        --hash=sha256:cf877ab4ed6e302ec1d04952ca358b381a882fbd9d1b07cccbfd61783561f98a \
+        --hash=sha256:d9d971ec1e79906046aa3ca266de79eac42f1dbf3612a05dc9368125952bd1a1 \
+        --hash=sha256:da25303d91526aac3672ee6d49a2f3db2d9502a4a60b55519feb1a4c7714e07d \
+        --hash=sha256:e55e40ff0cc8cc5c07996915ad367fa47da6b3fc091fdadca7f5403239c5fec3 \
+        --hash=sha256:f03a532d7dee1bed20bc4884194a16160a2de9ffc6354b3878ec9682bb623c54 \
+        --hash=sha256:f1cd098434e83e656abf198f103a8207a8187c0fc110306691a2e94a78d0abb2 \
+        --hash=sha256:f2bfb563d0211ce16b63c7cb9395d2c682a23187f54c3d79bfec33e6705473c6 \
+        --hash=sha256:f8ffb705ffcf5ddd0e80b65ddf7bed7ee4f5a441ea7d3419e861a12eaf41af58
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
 /// `--generate-hashes` should update the hashes in the "lockfile" if the package is upgraded due
 /// to a change in requirements.
 #[test]
@@ -6253,7 +6762,7 @@ fn unnamed_path_requirement() -> Result<()> {
 fn unnamed_git_requirement() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_in = context.temp_dir.child("requirements.in");
-    requirements_in.write_str("git+https://github.com/pallets/flask.git")?;
+    requirements_in.write_str("git+https://github.com/pallets/flask.git@3.0.0")?;
 
     uv_snapshot!(context.compile()
         .arg("requirements.in"), @r###"
@@ -6266,7 +6775,7 @@ fn unnamed_git_requirement() -> Result<()> {
         # via flask
     click==8.1.7
         # via flask
-    flask @ git+https://github.com/pallets/flask.git@b90a4f1f4a370e92054b9cc9db0efcb864f87ebe
+    flask @ git+https://github.com/pallets/flask.git@735a4701d6d5e848241e7d7535db898efb62d400
     itsdangerous==2.1.2
         # via flask
     jinja2==3.1.3
@@ -6875,19 +7384,16 @@ requires-python = ">3.8"
         .arg("requirements.in")
         .arg("--override")
         .arg("overrides.txt"), @r###"
-        success: false
-        exit_code: 1
-        ----- stdout -----
+    success: false
+    exit_code: 1
+    ----- stdout -----
 
-        ----- stderr -----
-          × No solution found when resolving dependencies:
-          ╰─▶ Because there is no version of anyio==0.0.0 and lib==0.0.0 depends on
-              anyio==0.0.0, we can conclude that lib==0.0.0 cannot be used.
-              And because only lib==0.0.0 is available and example==0.0.0 depends on
-              lib, we can conclude that example==0.0.0 cannot be used.
-              And because only example==0.0.0 is available and you require example, we
-              can conclude that the requirements are unsatisfiable.
-        "###
+    ----- stderr -----
+      × No solution found when resolving dependencies:
+      ╰─▶ Because there is no version of anyio==0.0.0 and lib==0.0.0 depends on anyio==0.0.0, we can conclude that lib==0.0.0 cannot be used.
+          And because only lib==0.0.0 is available and example==0.0.0 depends on lib, we can conclude that example==0.0.0 cannot be used.
+          And because only example==0.0.0 is available and you require example, we can conclude that the requirements are unsatisfiable.
+    "###
     );
 
     // Now constrain `anyio` to the local version.
@@ -7027,3 +7533,255 @@ requires-python = ">3.8"
 
     Ok(())
 }
+
+/// Install a package via `--extra-index-url`.
+///
+/// If the package exists exist on the "extra" index, but at an incompatible version, the
+/// resolution should fail by default (even though a compatible version exists on the "primary"
+/// index).
+#[test]
+fn compile_index_url_first_match() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("jinja2==3.1.0")?;
+
+    uv_snapshot!(context.compile()
+        .arg("--index-url")
+        .arg("https://pypi.org/simple")
+        .arg("--extra-index-url")
+        .arg("https://download.pytorch.org/whl/cpu")
+        .arg("requirements.in")
+        .arg("--no-deps"), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+      × No solution found when resolving dependencies:
+      ╰─▶ Because there is no version of jinja2==3.1.0 and you require jinja2==3.1.0, we can conclude that the requirements are unsatisfiable.
+    "###
+    );
+
+    Ok(())
+}
+
+/// Install a package via `--extra-index-url`.
+///
+/// If the package exists exist on the "extra" index, but at an incompatible version, the
+/// resolution should fallback to the "primary" index when `--index-strategy unsafe-any-match`
+/// is provided.
+#[test]
+fn compile_index_url_fallback() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("jinja2==3.1.0")?;
+
+    uv_snapshot!(context.compile()
+        .arg("--index-strategy")
+        .arg("unsafe-any-match")
+        .arg("--index-url")
+        .arg("https://pypi.org/simple")
+        .arg("--extra-index-url")
+        .arg("https://download.pytorch.org/whl/cpu")
+        .arg("requirements.in")
+        .arg("--no-deps"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z --index-strategy unsafe-any-match requirements.in --no-deps
+    jinja2==3.1.0
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Install a package via `--extra-index-url`.
+///
+/// If the package exists exist on the "extra" index at a compatible version, the resolver should
+/// prefer it, even if a newer versions exists on the "primary" index.
+///
+/// In this case, Jinja 3.1.2 is hosted on the "extra" index, but newer versions are available on
+/// the "primary" index.
+#[test]
+fn compile_index_url_fallback_prefer_primary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("jinja2")?;
+
+    uv_snapshot!(context.compile_without_exclude_newer()
+        .arg("--index-strategy")
+        .arg("unsafe-any-match")
+        .arg("--index-url")
+        .arg("https://pypi.org/simple")
+        .arg("--extra-index-url")
+        .arg("https://download.pytorch.org/whl/cpu")
+        .arg("requirements.in")
+        .arg("--no-deps"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --index-strategy unsafe-any-match requirements.in --no-deps
+    jinja2==3.1.2
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Ensure that `--emit-index-annotation` prints the index URL for each package.
+#[test]
+fn emit_index_annotation_pypi_org_simple() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("requests")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--emit-index-annotation"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --emit-index-annotation
+    certifi==2024.2.2
+        # via requests
+        # from https://pypi.org/simple
+    charset-normalizer==3.3.2
+        # via requests
+        # from https://pypi.org/simple
+    idna==3.6
+        # via requests
+        # from https://pypi.org/simple
+    requests==2.31.0
+        # from https://pypi.org/simple
+    urllib3==2.2.1
+        # via requests
+        # from https://pypi.org/simple
+
+    ----- stderr -----
+    Resolved 5 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Ensure that `--emit-index-annotation` plays nicely with `--no-annotate`.
+///
+/// For now, `--no-annotate` doesn't affect `--emit-index-annotation`, in that we still emit the
+/// index annotation, and leave `--no-annotate` to only affect the package _source_ annotations.
+#[test]
+fn emit_index_annotation_no_annotate() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("requests")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--emit-index-annotation")
+        .arg("--no-annotate"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --emit-index-annotation --no-annotate
+    certifi==2024.2.2
+        # from https://pypi.org/simple
+    charset-normalizer==3.3.2
+        # from https://pypi.org/simple
+    idna==3.6
+        # from https://pypi.org/simple
+    requests==2.31.0
+        # from https://pypi.org/simple
+    urllib3==2.2.1
+        # from https://pypi.org/simple
+
+    ----- stderr -----
+    Resolved 5 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// Ensure that `--emit-index-annotation` plays nicely with `--annotation-style=line`.
+#[test]
+fn emit_index_annotation_line() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("requests")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--emit-index-annotation")
+        .arg("--annotation-style")
+        .arg("line"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --emit-index-annotation --annotation-style line
+    certifi==2024.2.2         # via requests
+        # from https://pypi.org/simple
+    charset-normalizer==3.3.2  # via requests
+        # from https://pypi.org/simple
+    idna==3.6                 # via requests
+        # from https://pypi.org/simple
+    requests==2.31.0
+        # from https://pypi.org/simple
+    urllib3==2.2.1            # via requests
+        # from https://pypi.org/simple
+
+    ----- stderr -----
+    Resolved 5 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
+
+/// `--emit-index-annotation` where packages are pulled from two distinct indexes.
+#[test]
+fn emit_index_annotation_multiple_indexes() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("uv\nrequests")?;
+
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--extra-index-url")
+        .arg("https://test.pypi.org/simple")
+        .arg("--emit-index-annotation"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --emit-index-annotation
+    requests==2.5.4.1
+        # from https://test.pypi.org/simple
+    uv==0.1.24
+        # from https://pypi.org/simple
+
+    ----- stderr -----
+    Resolved 2 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}
diff --git a/crates/uv/tests/pip_compile_scenarios.rs b/crates/uv/tests/pip_compile_scenarios.rs
index 7398d84b1..c5a920a12 100644
--- a/crates/uv/tests/pip_compile_scenarios.rs
+++ b/crates/uv/tests/pip_compile_scenarios.rs
@@ -1,9 +1,9 @@
 //! DO NOT EDIT
 //!
 //! Generated with `./scripts/sync_scenarios.sh`
-//! Scenarios from <https://github.com/zanieb/packse/tree/0.3.12/scenarios>
+//! Scenarios from <https://github.com/astral-sh/packse/tree/0.3.14/scenarios>
 //!
-#![cfg(all(feature = "python", feature = "pypi"))]
+#![cfg(all(feature = "python", feature = "pypi", unix))]
 
 use std::env;
 use std::process::Command;
@@ -13,28 +13,28 @@ use assert_cmd::assert::OutputAssertExt;
 use assert_fs::fixture::{FileWriteStr, PathChild};
 use predicates::prelude::predicate;
 
-use common::{create_bin_with_executables, get_bin, uv_snapshot, TestContext};
+use common::{get_bin, python_path_with_versions, uv_snapshot, TestContext};
 
 mod common;
 
 /// Provision python binaries and return a `pip compile` command with options shared across all scenarios.
 fn command(context: &TestContext, python_versions: &[&str]) -> Command {
-    let bin = create_bin_with_executables(&context.temp_dir, python_versions)
-        .expect("Failed to create bin dir");
+    let python_path = python_path_with_versions(&context.temp_dir, python_versions)
+        .expect("Failed to create Python test path");
     let mut command = Command::new(get_bin());
     command
         .arg("pip")
         .arg("compile")
         .arg("requirements.in")
         .arg("--index-url")
-        .arg("https://astral-sh.github.io/packse/0.3.12/simple-html/")
+        .arg("https://astral-sh.github.io/packse/0.3.14/simple-html/")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/zanieb/packse/0.3.12/vendor/links.html")
+        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.14/vendor/links.html")
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
         .env("UV_NO_WRAP", "1")
-        .env("UV_TEST_PYTHON_PATH", bin)
+        .env("UV_TEST_PYTHON_PATH", python_path)
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -84,7 +84,7 @@ fn incompatible_python_compatible_override() -> Result<()> {
                  package-a==1.0.0
 
                  ----- stderr -----
-                 warning: The requested Python version 3.11 is not available; 3.9.18 will be used to build dependencies instead.
+                 warning: The requested Python version 3.11 is not available; 3.9.[X] will be used to build dependencies instead.
                  Resolved 1 package in [TIME]
                  "###
     );
@@ -130,7 +130,7 @@ fn compatible_python_incompatible_override() -> Result<()> {
                  ----- stdout -----
 
                  ----- stderr -----
-                 warning: The requested Python version 3.9 is not available; 3.11.7 will be used to build dependencies instead.
+                 warning: The requested Python version 3.9 is not available; 3.11.[X] will be used to build dependencies instead.
                    × No solution found when resolving dependencies:
                    ╰─▶ Because the requested Python version (3.9) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
                        And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
@@ -184,9 +184,9 @@ fn incompatible_python_compatible_override_unavailable_no_wheels() -> Result<()>
                  ----- stdout -----
 
                  ----- stderr -----
-                 warning: The requested Python version 3.11 is not available; 3.9.18 will be used to build dependencies instead.
+                 warning: The requested Python version 3.11 is not available; 3.9.[X] will be used to build dependencies instead.
                    × No solution found when resolving dependencies:
-                   ╰─▶ Because the current Python version (3.9.18) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
+                   ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
                        And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
                  "###
     );
@@ -295,9 +295,9 @@ fn incompatible_python_compatible_override_no_compatible_wheels() -> Result<()>
                  ----- stdout -----
 
                  ----- stderr -----
-                 warning: The requested Python version 3.11 is not available; 3.9.18 will be used to build dependencies instead.
+                 warning: The requested Python version 3.11 is not available; 3.9.[X] will be used to build dependencies instead.
                    × No solution found when resolving dependencies:
-                   ╰─▶ Because the current Python version (3.9.18) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
+                   ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
                        And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
                  "###
     );
@@ -353,9 +353,9 @@ fn incompatible_python_compatible_override_other_wheel() -> Result<()> {
                  ----- stdout -----
 
                  ----- stderr -----
-                 warning: The requested Python version 3.11 is not available; 3.9.18 will be used to build dependencies instead.
+                 warning: The requested Python version 3.11 is not available; 3.9.[X] will be used to build dependencies instead.
                    × No solution found when resolving dependencies:
-                   ╰─▶ Because the current Python version (3.9.18) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
+                   ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
                        And because only the following versions of package-a are available:
                            package-a==1.0.0
                            package-a==2.0.0
@@ -386,6 +386,7 @@ fn incompatible_python_compatible_override_other_wheel() -> Result<()> {
 ///     └── a-1.0.0
 ///         └── requires python>=3.8.4
 /// ```
+#[cfg(feature = "python-patch")]
 #[test]
 fn python_patch_override_no_patch() -> Result<()> {
     let context = TestContext::new("3.8.18");
@@ -433,6 +434,7 @@ fn python_patch_override_no_patch() -> Result<()> {
 ///     └── a-1.0.0
 ///         └── requires python>=3.8.0
 /// ```
+#[cfg(feature = "python-patch")]
 #[test]
 fn python_patch_override_patch_compatible() -> Result<()> {
     let context = TestContext::new("3.8.18");
diff --git a/crates/uv/tests/pip_freeze.rs b/crates/uv/tests/pip_freeze.rs
index d3e5b4582..71da76dc9 100644
--- a/crates/uv/tests/pip_freeze.rs
+++ b/crates/uv/tests/pip_freeze.rs
@@ -19,6 +19,7 @@ fn command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
     command
 }
@@ -32,6 +33,7 @@ fn sync_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
diff --git a/crates/uv/tests/pip_install.rs b/crates/uv/tests/pip_install.rs
index ee987fb0b..95457a472 100644
--- a/crates/uv/tests/pip_install.rs
+++ b/crates/uv/tests/pip_install.rs
@@ -1,5 +1,7 @@
 #![cfg(all(feature = "python", feature = "pypi"))]
 
+use std::process::Command;
+
 use anyhow::Result;
 use assert_cmd::prelude::*;
 use assert_fs::prelude::*;
@@ -7,12 +9,10 @@ use base64::{prelude::BASE64_STANDARD as base64, Engine};
 use indoc::indoc;
 use itertools::Itertools;
 
-use std::process::Command;
-
 use common::{uv_snapshot, TestContext};
 use uv_fs::Simplified;
 
-use crate::common::get_bin;
+use crate::common::{get_bin, BUILD_VENDOR_LINKS_URL};
 
 mod common;
 
@@ -267,11 +267,8 @@ fn no_solution() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because only flask<=3.0.2 is available and flask==3.0.2 depends
-          on werkzeug>=3.0.0, we can conclude that flask>=3.0.2 depends on
-          werkzeug>=3.0.0.
-          And because you require flask>=3.0.2 and you require werkzeug<1.0.0, we
-          can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because only flask<=3.0.2 is available and flask==3.0.2 depends on werkzeug>=3.0.0, we can conclude that flask>=3.0.2 depends on werkzeug>=3.0.0.
+          And because you require flask>=3.0.2 and you require werkzeug<1.0.0, we can conclude that the requirements are unsatisfiable.
     "###);
 }
 
@@ -360,6 +357,55 @@ fn install_requirements_txt() -> Result<()> {
     Ok(())
 }
 
+/// Install a `pyproject.toml` file with a `poetry` section.
+#[test]
+fn install_pyproject_toml_poetry() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"[tool.poetry]
+name = "poetry-editable"
+version = "0.1.0"
+description = ""
+authors = ["Astral Software Inc. <hey@astral.sh>"]
+
+[tool.poetry.dependencies]
+python = "^3.10"
+anyio = "^3"
+iniconfig = { version = "*", optional = true }
+
+[tool.poetry.extras]
+test = ["iniconfig"]
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+"#,
+    )?;
+
+    uv_snapshot!(context.install()
+            .arg("-r")
+            .arg("pyproject.toml")
+            .arg("--extra")
+            .arg("test"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 4 packages in [TIME]
+    Downloaded 4 packages in [TIME]
+    Installed 4 packages in [TIME]
+     + anyio==3.7.1
+     + idna==3.6
+     + iniconfig==2.0.0
+     + sniffio==1.3.1
+    "###
+    );
+
+    Ok(())
+}
+
 /// Respect installed versions when resolving.
 #[test]
 fn respect_installed_and_reinstall() -> Result<()> {
@@ -367,7 +413,6 @@ fn respect_installed_and_reinstall() -> Result<()> {
 
     // Install Flask.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask==2.3.2")?;
 
     uv_snapshot!(context.install()
@@ -396,7 +441,6 @@ fn respect_installed_and_reinstall() -> Result<()> {
 
     // Re-install Flask. We should respect the existing version.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask")?;
 
     uv_snapshot!(context.install()
@@ -416,7 +460,6 @@ fn respect_installed_and_reinstall() -> Result<()> {
 
     // Install a newer version of Flask. We should upgrade it.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask==2.3.3")?;
 
     let filters = if cfg!(windows) {
@@ -448,7 +491,6 @@ fn respect_installed_and_reinstall() -> Result<()> {
 
     // Re-install Flask. We should upgrade it.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask")?;
 
     uv_snapshot!(filters, context.install()
@@ -472,7 +514,6 @@ fn respect_installed_and_reinstall() -> Result<()> {
 
     // Re-install Flask. We should install even though the version is current
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask")?;
 
     uv_snapshot!(filters, context.install()
@@ -531,7 +572,6 @@ fn reinstall_extras() -> Result<()> {
 
     // Re-install httpx, with an extra.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("httpx[http2]")?;
 
     uv_snapshot!(context.install()
@@ -564,7 +604,6 @@ fn reinstall_incomplete() -> Result<()> {
 
     // Install anyio.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("anyio==3.7.0")?;
 
     uv_snapshot!(context.install()
@@ -589,7 +628,6 @@ fn reinstall_incomplete() -> Result<()> {
 
     // Re-install anyio.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("anyio==4.0.0")?;
 
     uv_snapshot!(context.filters(), context.install()
@@ -619,7 +657,6 @@ fn allow_incompatibilities() -> Result<()> {
 
     // Install Flask, which relies on `Werkzeug>=3.0.0`.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Flask")?;
 
     uv_snapshot!(context.install()
@@ -648,7 +685,6 @@ fn allow_incompatibilities() -> Result<()> {
 
     // Install an incompatible version of Jinja2.
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("jinja2==2.11.3")?;
 
     uv_snapshot!(context.install()
@@ -897,12 +933,9 @@ fn install_no_index() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because flask was not found in the provided package locations and you
-          require flask, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because flask was not found in the provided package locations and you require flask, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -924,13 +957,9 @@ fn install_no_index_version() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because flask==3.0.0 was not found in the provided package locations
-          and you require flask==3.0.0, we can conclude that the requirements
-          are unsatisfiable.
+      ╰─▶ Because flask==3.0.0 was not found in the provided package locations and you require flask==3.0.0, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -1323,10 +1352,7 @@ fn only_binary_requirements_txt() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because django-allauth==0.51.0 is unusable because no wheels
-          are usable and building from source is disabled and you require
-          django-allauth==0.51.0, we can conclude that the requirements are
-          unsatisfiable.
+      ╰─▶ Because django-allauth==0.51.0 is unusable because no wheels are usable and building from source is disabled and you require django-allauth==0.51.0, we can conclude that the requirements are unsatisfiable.
     "###
     );
 }
@@ -1805,7 +1831,7 @@ fn launcher() -> Result<()> {
     uv_snapshot!(
         filters,
         context.install()
-        .arg(format!("simple_launcher@{}", project_root.join("scripts/wheels/simple_launcher-0.1.0-py3-none-any.whl").display()))
+        .arg(format!("simple_launcher@{}", project_root.join("scripts/links/simple_launcher-0.1.0-py3-none-any.whl").display()))
         .arg("--strict"), @r###"
     success: true
     exit_code: 0
@@ -1850,7 +1876,7 @@ fn launcher_with_symlink() -> Result<()> {
 
     uv_snapshot!(filters,
         context.install()
-            .arg(format!("simple_launcher@{}", project_root.join("scripts/wheels/simple_launcher-0.1.0-py3-none-any.whl").display()))
+            .arg(format!("simple_launcher@{}", project_root.join("scripts/links/simple_launcher-0.1.0-py3-none-any.whl").display()))
             .arg("--strict"),
         @r###"
     success: true
@@ -2379,7 +2405,7 @@ requires-python = "<=3.8"
 "#,
     )?;
 
-    uv_snapshot!(context.install()
+    uv_snapshot!(context.filters(), context.install()
         .arg("--editable")
         .arg(editable_dir.path()), @r###"
     success: false
@@ -2387,7 +2413,7 @@ requires-python = "<=3.8"
     ----- stdout -----
 
     ----- stderr -----
-    error: Editable `example` requires Python <=3.8, but 3.12.1 is installed
+    error: Editable `example` requires Python <=3.8, but 3.12.[X] is installed
     "###
     );
 
@@ -2472,7 +2498,6 @@ fn no_build_isolation() -> Result<()> {
 fn install_utf16le_requirements() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_binary(&utf8_to_utf16_with_bom_le("tomli"))?;
 
     uv_snapshot!(context.install_without_exclude_newer()
@@ -2499,7 +2524,6 @@ fn install_utf16le_requirements() -> Result<()> {
 fn install_utf16be_requirements() -> Result<()> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_binary(&utf8_to_utf16_with_bom_be("tomli"))?;
 
     uv_snapshot!(context.install_without_exclude_newer()
@@ -2543,7 +2567,6 @@ fn utf8_to_utf16_with_bom_be(s: &str) -> Vec<u8> {
 fn dry_run_install() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("httpx==0.25.1")?;
 
     uv_snapshot!(context.install()
@@ -2576,7 +2599,6 @@ fn dry_run_install() -> std::result::Result<(), Box<dyn std::error::Error>> {
 fn dry_run_install_url_dependency() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("anyio @ https://files.pythonhosted.org/packages/2d/b8/7333d87d5f03247215d86a86362fd3e324111788c6cdd8d2e6196a6ba833/anyio-4.2.0.tar.gz")?;
 
     uv_snapshot!(context.install()
@@ -2605,7 +2627,6 @@ fn dry_run_install_url_dependency() -> std::result::Result<(), Box<dyn std::erro
 fn dry_run_uninstall_url_dependency() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("anyio @ https://files.pythonhosted.org/packages/2d/b8/7333d87d5f03247215d86a86362fd3e324111788c6cdd8d2e6196a6ba833/anyio-4.2.0.tar.gz")?;
 
     // Install the URL dependency
@@ -2657,7 +2678,6 @@ fn dry_run_uninstall_url_dependency() -> std::result::Result<(), Box<dyn std::er
 fn dry_run_install_already_installed() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("httpx==0.25.1")?;
 
     // Install the package
@@ -2708,7 +2728,6 @@ fn dry_run_install_transitive_dependency_already_installed(
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("httpcore==1.0.2")?;
 
     // Install a dependency of httpx
@@ -2759,7 +2778,6 @@ fn dry_run_install_transitive_dependency_already_installed(
 fn dry_run_install_then_upgrade() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let context = TestContext::new("3.12");
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("httpx==0.25.0")?;
 
     // Install the package
@@ -2828,7 +2846,7 @@ requires-python = "<=3.8"
 "#,
     )?;
 
-    uv_snapshot!(context.install()
+    uv_snapshot!(context.filters(), context.install()
         .arg(format!("example @ {}", editable_dir.path().display())), @r###"
     success: false
     exit_code: 1
@@ -2836,11 +2854,8 @@ requires-python = "<=3.8"
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.12.1) does not satisfy Python<=3.8
-          and example==0.0.0 depends on Python<=3.8, we can conclude that
-          example==0.0.0 cannot be used.
-          And because only example==0.0.0 is available and you require example, we
-          can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because the current Python version (3.12.[X]) does not satisfy Python<=3.8 and example==0.0.0 depends on Python<=3.8, we can conclude that example==0.0.0 cannot be used.
+          And because only example==0.0.0 is available and you require example, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -3059,12 +3074,9 @@ fn reinstall_no_index() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because anyio was not found in the provided package locations and you
-          require anyio, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because anyio was not found in the provided package locations and you require anyio, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 }
@@ -3138,7 +3150,7 @@ fn already_installed_dependent_editable() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -3173,19 +3185,15 @@ fn already_installed_dependent_editable() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: false
     exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because first-editable was not found in the provided package locations
-          and second-editable==0.0.1 depends on first-editable, we can conclude
-          that second-editable==0.0.1 cannot be used.
-          And because only second-editable==0.0.1 is available and you
-          require second-editable, we can conclude that the requirements are
-          unsatisfiable.
+      ╰─▶ Because first-editable was not found in the provided package locations and second-editable==0.0.1 depends on first-editable, we can conclude that second-editable==0.0.1 cannot be used.
+          And because only second-editable==0.0.1 is available and you require second-editable, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -3238,7 +3246,7 @@ fn already_installed_local_path_dependent() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -3273,18 +3281,15 @@ fn already_installed_local_path_dependent() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: false
     exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because first-local was not found in the provided package locations
-          and second-local==0.1.0 depends on first-local, we can conclude that
-          second-local==0.1.0 cannot be used.
-          And because only second-local==0.1.0 is available and you require
-          second-local, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because first-local was not found in the provided package locations and second-local==0.1.0 depends on first-local, we can conclude that second-local==0.1.0 cannot be used.
+          And because only second-local==0.1.0 is available and you require second-local, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -3316,18 +3321,15 @@ fn already_installed_local_path_dependent() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: false
     exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because first-local was not found in the provided package locations
-          and second-local==0.1.0 depends on first-local, we can conclude that
-          second-local==0.1.0 cannot be used.
-          And because only second-local==0.1.0 is available and you require
-          second-local, we can conclude that the requirements are unsatisfiable.
+      ╰─▶ Because first-local was not found in the provided package locations and second-local==0.1.0 depends on first-local, we can conclude that second-local==0.1.0 cannot be used.
+          And because only second-local==0.1.0 is available and you require second-local, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -3341,7 +3343,7 @@ fn already_installed_local_path_dependent() {
         // Disable the index to guard this test against dependency confusion attacks
         .arg("--no-index")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.12/vendor/links.html"), @r###"
+        .arg(BUILD_VENDOR_LINKS_URL), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -3398,13 +3400,9 @@ fn already_installed_local_version_of_remote_package() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because anyio==4.2.0 was not found in the provided package locations
-          and you require anyio==4.2.0, we can conclude that the requirements
-          are unsatisfiable.
+      ╰─▶ Because anyio==4.2.0 was not found in the provided package locations and you require anyio==4.2.0, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -3419,9 +3417,7 @@ fn already_installed_local_version_of_remote_package() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because there is no version of anyio==4.3.0+foo and you require
-          anyio==4.3.0+foo, we can conclude that the requirements are
-          unsatisfiable.
+      ╰─▶ Because there is no version of anyio==4.3.0+foo and you require anyio==4.3.0+foo, we can conclude that the requirements are unsatisfiable.
     "###
     );
 
@@ -3632,13 +3628,9 @@ fn already_installed_remote_url() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because uv-public-pypackage was not found in the provided package
-          locations and you require uv-public-pypackage, we can conclude that the
-          requirements are unsatisfiable.
+      ╰─▶ Because uv-public-pypackage was not found in the provided package locations and you require uv-public-pypackage, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###);
 
     // Request installation again with just the full URL
@@ -3681,12 +3673,428 @@ fn already_installed_remote_url() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because uv-public-pypackage==0.2.0 was not found in the provided package
-          locations and you require uv-public-pypackage==0.2.0, we can conclude
-          that the requirements are unsatisfiable.
+      ╰─▶ Because uv-public-pypackage==0.2.0 was not found in the provided package locations and you require uv-public-pypackage==0.2.0, we can conclude that the requirements are unsatisfiable.
 
-          hint: Packages were unavailable because index lookups were disabled
-          and no additional package locations were provided (try: `--find-links
-          <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###);
 }
+
+/// Sync using `--find-links` with a local directory.
+#[test]
+fn find_links() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc! {r"
+        tqdm
+    "})?;
+
+    uv_snapshot!(context.filters(), context.install()
+        .arg("tqdm")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==1000.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Sync using `--find-links` with a local directory, with wheels disabled.
+#[test]
+fn find_links_no_binary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc! {r"
+        tqdm
+    "})?;
+
+    uv_snapshot!(context.filters(), context.install()
+        .arg("tqdm")
+        .arg("--no-binary")
+        .arg(":all:")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==999.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Provide valid hashes for all dependencies with `--require-hashes`.
+#[test]
+fn require_hashes() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Write to a requirements file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc::indoc! {r"
+        anyio==4.0.0 \
+            --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f \
+            --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+        idna==3.6 \
+            --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+            --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+            # via anyio
+        sniffio==1.3.1 \
+            --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+            --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+            # via anyio
+    "})?;
+
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Downloaded 3 packages in [TIME]
+    Installed 3 packages in [TIME]
+     + anyio==4.0.0
+     + idna==3.6
+     + sniffio==1.3.1
+    "###
+    );
+
+    Ok(())
+}
+
+/// Omit hashes for dependencies with `--require-hashes`, which is allowed with `--no-deps`.
+#[test]
+fn require_hashes_no_deps() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Write to a requirements file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc::indoc! {r"
+        anyio==4.0.0 \
+            --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f \
+            --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+    "})?;
+
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--no-deps")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Provide the wrong hash with `--require-hashes`.
+#[test]
+fn require_hashes_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Write to a requirements file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(
+        "anyio==4.0.0 --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+    )?;
+
+    // Raise an error.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirements must be pinned upfront with `==`, but found: idna
+    "###
+    );
+
+    Ok(())
+}
+
+/// Omit a transitive dependency in `--require-hashes`.
+#[test]
+fn require_hashes_missing_dependency() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Write to a requirements file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(
+        "anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+    )?;
+
+    // Install without error when `--require-hashes` is omitted.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirements must be pinned upfront with `==`, but found: idna
+    "###
+    );
+
+    Ok(())
+}
+
+/// We disallow `--require-hashes` for editables' dependencies.
+#[test]
+fn require_hashes_editable() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&indoc::formatdoc! {r"
+        -e file://{workspace_root}/scripts/packages/black_editable[d]
+        ",
+        workspace_root = context.workspace_root.simplified_display(),
+    })?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.filters(), context.install()
+        .arg("-r")
+        .arg(requirements_txt.path())
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Built 1 editable in [TIME]
+    error: In `--require-hashes` mode, all requirements must be pinned upfront with `==`, but found: aiohttp
+    "###
+    );
+
+    Ok(())
+}
+
+/// If a hash is only included as a constraint, that's not good enough for `--require-hashes`.
+#[test]
+fn require_hashes_constraint() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Include the hash in the constraint file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("anyio==4.0.0")?;
+
+    let constraints_txt = context.temp_dir.child("constraints.txt");
+    constraints_txt.write_str("anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg(requirements_txt.path())
+        .arg("--require-hashes")
+        .arg("-c")
+        .arg(constraints_txt.path()), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have a hash, but none were provided for: anyio==4.0.0
+    "###
+    );
+
+    // Include the hash in the requirements file, but pin the version in the constraint file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(
+        "anyio --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+    )?;
+
+    let constraints_txt = context.temp_dir.child("constraints.txt");
+    constraints_txt.write_str("anyio==4.0.0")?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg(requirements_txt.path())
+        .arg("--require-hashes")
+        .arg("-c")
+        .arg(constraints_txt.path()), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: anyio
+    "###
+    );
+
+    Ok(())
+}
+
+/// We allow `--require-hashes` for unnamed URL dependencies.
+#[test]
+fn require_hashes_unnamed() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! {r"
+            https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+            idna==3.6 \
+                --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+                --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+                # via anyio
+            sniffio==1.3.1 \
+                --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+                --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+                # via anyio
+        "})?;
+
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Downloaded 3 packages in [TIME]
+    Installed 3 packages in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+     + idna==3.6
+     + sniffio==1.3.1
+    "###
+    );
+
+    Ok(())
+}
+
+/// We allow `--require-hashes` for unnamed URL dependencies. In this case, the unnamed URL is
+/// a repeat of a registered package.
+#[test]
+fn require_hashes_unnamed_repeated() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Re-run, but duplicate `anyio`.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! {r"
+            anyio==4.0.0 \
+                --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f \
+                --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+            https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+            idna==3.6 \
+                --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+                --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+                # via anyio
+            sniffio==1.3.1 \
+                --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+                --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+                # via anyio
+        "} )?;
+
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Downloaded 3 packages in [TIME]
+    Installed 3 packages in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+     + idna==3.6
+     + sniffio==1.3.1
+    "###
+    );
+
+    Ok(())
+}
+
+/// If a hash is only included as a override, that's not good enough for `--require-hashes`.
+///
+/// TODO(charlie): This _should_ be allowed. It's a bug.
+#[test]
+fn require_hashes_override() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Include the hash in the override file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("anyio==4.0.0")?;
+
+    let overrides_txt = context.temp_dir.child("overrides.txt");
+    overrides_txt.write_str("anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg(requirements_txt.path())
+        .arg("--require-hashes")
+        .arg("--override")
+        .arg(overrides_txt.path()), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have a hash, but none were provided for: anyio==4.0.0
+    "###
+    );
+
+    // Include the hash in the requirements file, but pin the version in the override file.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(
+        "anyio --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+    )?;
+
+    let overrides_txt = context.temp_dir.child("overrides.txt");
+    overrides_txt.write_str("anyio==4.0.0")?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.install()
+        .arg("-r")
+        .arg(requirements_txt.path())
+        .arg("--require-hashes")
+        .arg("--override")
+        .arg(overrides_txt.path()), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: anyio
+    "###
+    );
+
+    Ok(())
+}
diff --git a/crates/uv/tests/pip_install_scenarios.rs b/crates/uv/tests/pip_install_scenarios.rs
index f79a30d19..43c399e1b 100644
--- a/crates/uv/tests/pip_install_scenarios.rs
+++ b/crates/uv/tests/pip_install_scenarios.rs
@@ -1,9 +1,9 @@
 //! DO NOT EDIT
 //!
 //! Generated with `./scripts/sync_scenarios.sh`
-//! Scenarios from <https://github.com/zanieb/packse/tree/0.3.12/scenarios>
+//! Scenarios from <https://github.com/astral-sh/packse/tree/0.3.14/scenarios>
 //!
-#![cfg(all(feature = "python", feature = "pypi"))]
+#![cfg(all(feature = "python", feature = "pypi", unix))]
 
 use std::path::Path;
 use std::process::Command;
@@ -46,9 +46,9 @@ fn command(context: &TestContext) -> Command {
         .arg("pip")
         .arg("install")
         .arg("--index-url")
-        .arg("https://astral-sh.github.io/packse/0.3.12/simple-html/")
+        .arg("https://astral-sh.github.io/packse/0.3.14/simple-html/")
         .arg("--find-links")
-        .arg("https://raw.githubusercontent.com/zanieb/packse/0.3.12/vendor/links.html")
+        .arg("https://raw.githubusercontent.com/astral-sh/packse/0.3.14/vendor/links.html")
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
@@ -501,7 +501,7 @@ fn dependency_excludes_range_of_compatible_versions() {
 /// There is a non-contiguous range of compatible versions for the requested package
 /// `a`, but another dependency `c` excludes the range. This is the same as
 /// `dependency-excludes-range-of-compatible-versions` but some of the versions of
-/// `a` are incompatible for another reason e.g. dependency on non-existent package
+/// `a` are incompatible for another reason e.g. dependency on non-existant package
 /// `d`.
 ///
 /// ```text
@@ -708,6 +708,7 @@ fn missing_extra() {
 
     ----- stderr -----
     Resolved 1 package in [TIME]
+    warning: The package `package-a==1.0.0` does not have an extra named `extra`.
     Downloaded 1 package in [TIME]
     Installed 1 package in [TIME]
      + package-a==1.0.0
@@ -1080,6 +1081,7 @@ fn extra_does_not_exist_backtrack() {
 
     ----- stderr -----
     Resolved 1 package in [TIME]
+    warning: The package `package-a==3.0.0` does not have an extra named `extra`.
     Downloaded 1 package in [TIME]
     Installed 1 package in [TIME]
      + package-a==3.0.0
@@ -1750,7 +1752,7 @@ fn local_transitive_confounding() {
           And because only package-a==1.0.0 is available and you require package-a, we can conclude that the requirements are unsatisfiable.
     "###);
 
-    // The version '1.2.3+foo' satisfies the constraint '==1.2.3'.
+    // The version '2.0.0+foo' satisfies the constraint '==2.0.0'.
     assert_not_installed(
         &context.venv,
         "local_transitive_confounding_a",
@@ -3483,7 +3485,7 @@ fn package_only_prereleases_boundary() {
     "###);
 
     // Since there are only prerelease versions of `a` available, a prerelease is
-    // allowed. Since the user did not explicitly request a pre-release, pre-releases at
+    // allowed. Since the user did not explictly request a pre-release, pre-releases at
     // the boundary should not be selected.
     assert_installed(
         &context.venv,
@@ -3669,7 +3671,7 @@ fn python_version_does_not_exist() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.8.18) does not satisfy Python>=3.30 and package-a==1.0.0 depends on Python>=3.30, we can conclude that package-a==1.0.0 cannot be used.
+      ╰─▶ Because the current Python version (3.8.[X]) does not satisfy Python>=3.30 and package-a==1.0.0 depends on Python>=3.30, we can conclude that package-a==1.0.0 cannot be used.
           And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
     "###);
 
@@ -3711,7 +3713,7 @@ fn python_less_than_current() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.9.18) does not satisfy Python<=3.8 and package-a==1.0.0 depends on Python<=3.8, we can conclude that package-a==1.0.0 cannot be used.
+      ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python<=3.8 and package-a==1.0.0 depends on Python<=3.8, we can conclude that package-a==1.0.0 cannot be used.
           And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
     "###);
 
@@ -3753,7 +3755,7 @@ fn python_greater_than_current() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.9.18) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
+      ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python>=3.10 and package-a==1.0.0 depends on Python>=3.10, we can conclude that package-a==1.0.0 cannot be used.
           And because you require package-a==1.0.0, we can conclude that the requirements are unsatisfiable.
     "###);
 
@@ -3778,6 +3780,7 @@ fn python_greater_than_current() {
 ///     └── a-1.0.0
 ///         └── requires python>=3.8.14 (incompatible with environment)
 /// ```
+#[cfg(feature = "python-patch")]
 #[test]
 fn python_greater_than_current_patch() {
     let context = TestContext::new("3.8.12");
@@ -3959,22 +3962,22 @@ fn python_greater_than_current_excluded() {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because the current Python version (3.9.18) does not satisfy Python>=3.10,<3.11 and the current Python version (3.9.18) does not satisfy Python>=3.12, we can conclude that any of:
+      ╰─▶ Because the current Python version (3.9.[X]) does not satisfy Python>=3.10,<3.11 and the current Python version (3.9.[X]) does not satisfy Python>=3.12, we can conclude that any of:
               Python>=3.10,<3.11
               Python>=3.12
            are incompatible.
-          And because the current Python version (3.9.18) does not satisfy Python>=3.11,<3.12, we can conclude that Python>=3.10 are incompatible.
+          And because the current Python version (3.9.[X]) does not satisfy Python>=3.11,<3.12, we can conclude that Python>=3.10 are incompatible.
           And because package-a==2.0.0 depends on Python>=3.10 and only the following versions of package-a are available:
               package-a<=2.0.0
               package-a==3.0.0
               package-a==4.0.0
           we can conclude that package-a>=2.0.0,<3.0.0 cannot be used. (1)
 
-          Because the current Python version (3.9.18) does not satisfy Python>=3.11,<3.12 and the current Python version (3.9.18) does not satisfy Python>=3.12, we can conclude that Python>=3.11 are incompatible.
+          Because the current Python version (3.9.[X]) does not satisfy Python>=3.11,<3.12 and the current Python version (3.9.[X]) does not satisfy Python>=3.12, we can conclude that Python>=3.11 are incompatible.
           And because package-a==3.0.0 depends on Python>=3.11, we can conclude that package-a==3.0.0 cannot be used.
           And because we know from (1) that package-a>=2.0.0,<3.0.0 cannot be used, we can conclude that package-a>=2.0.0,<4.0.0 cannot be used. (2)
 
-          Because the current Python version (3.9.18) does not satisfy Python>=3.12 and package-a==4.0.0 depends on Python>=3.12, we can conclude that package-a==4.0.0 cannot be used.
+          Because the current Python version (3.9.[X]) does not satisfy Python>=3.12 and package-a==4.0.0 depends on Python>=3.12, we can conclude that package-a==4.0.0 cannot be used.
           And because we know from (2) that package-a>=2.0.0,<4.0.0 cannot be used, we can conclude that package-a>=2.0.0 cannot be used.
           And because you require package-a>=2.0.0, we can conclude that the requirements are unsatisfiable.
     "###);
diff --git a/crates/uv/tests/pip_list.rs b/crates/uv/tests/pip_list.rs
index 9b545ee2c..4b4fb7b36 100644
--- a/crates/uv/tests/pip_list.rs
+++ b/crates/uv/tests/pip_list.rs
@@ -1,8 +1,8 @@
 use std::process::Command;
 
 use anyhow::Result;
+use assert_fs::fixture::FileWriteStr;
 use assert_fs::fixture::PathChild;
-use assert_fs::fixture::{FileTouch, FileWriteStr};
 
 use common::uv_snapshot;
 
@@ -21,6 +21,7 @@ fn install_command(context: &TestContext) -> Command {
         .arg("--exclude-newer")
         .arg(EXCLUDE_NEWER)
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -42,6 +43,7 @@ fn list_empty() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -57,7 +59,6 @@ fn list_single_no_editable() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(install_command(&context)
@@ -84,6 +85,7 @@ fn list_single_no_editable() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -135,6 +137,7 @@ fn list_editable() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -188,6 +191,7 @@ fn list_editable_only() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -207,6 +211,7 @@ fn list_editable_only() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -229,6 +234,7 @@ fn list_editable_only() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -277,6 +283,7 @@ fn list_exclude() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -300,6 +307,7 @@ fn list_exclude() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -324,6 +332,7 @@ fn list_exclude() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -377,6 +386,7 @@ fn list_format_json() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -395,6 +405,7 @@ fn list_format_json() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -413,6 +424,7 @@ fn list_format_json() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -432,6 +444,7 @@ fn list_format_json() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -479,6 +492,7 @@ fn list_format_freeze() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -500,6 +514,7 @@ fn list_format_freeze() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -518,6 +533,7 @@ fn list_format_freeze() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -539,6 +555,7 @@ fn list_format_freeze() {
     .arg("--cache-dir")
     .arg(context.cache_dir.path())
     .env("VIRTUAL_ENV", context.venv.as_os_str())
+    .env("UV_NO_WRAP", "1")
     .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
diff --git a/crates/uv/tests/pip_show.rs b/crates/uv/tests/pip_show.rs
index 5edee570d..4bfbbce15 100644
--- a/crates/uv/tests/pip_show.rs
+++ b/crates/uv/tests/pip_show.rs
@@ -3,8 +3,8 @@ use std::process::Command;
 
 use anyhow::Result;
 use assert_cmd::prelude::*;
+use assert_fs::fixture::FileWriteStr;
 use assert_fs::fixture::PathChild;
-use assert_fs::fixture::{FileTouch, FileWriteStr};
 use indoc::indoc;
 
 use common::uv_snapshot;
@@ -24,6 +24,7 @@ fn install_command(context: &TestContext) -> Command {
         .arg("--exclude-newer")
         .arg(EXCLUDE_NEWER)
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -45,6 +46,7 @@ fn show_empty() {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: false
     exit_code: 1
@@ -61,7 +63,6 @@ fn show_requires_multiple() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("requests==2.31.0")?;
 
     uv_snapshot!(install_command(&context)
@@ -92,6 +93,7 @@ fn show_requires_multiple() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -116,7 +118,6 @@ fn show_python_version_marker() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("click==8.1.7")?;
 
     uv_snapshot!(install_command(&context)
@@ -149,6 +150,7 @@ fn show_python_version_marker() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -171,7 +173,6 @@ fn show_found_single_package() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(install_command(&context)
@@ -199,6 +200,7 @@ fn show_found_single_package() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -221,7 +223,6 @@ fn show_found_multiple_packages() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(indoc! {r"
         MarkupSafe==2.1.3
         pip==21.3.1
@@ -255,6 +256,7 @@ fn show_found_multiple_packages() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -283,7 +285,6 @@ fn show_found_one_out_of_three() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(indoc! {r"
         MarkupSafe==2.1.3
         pip==21.3.1
@@ -318,6 +319,7 @@ fn show_found_one_out_of_three() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -341,7 +343,6 @@ fn show_found_one_out_of_two_quiet() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(indoc! {r"
         MarkupSafe==2.1.3
         pip==21.3.1
@@ -377,6 +378,7 @@ fn show_found_one_out_of_two_quiet() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -394,7 +396,6 @@ fn show_empty_quiet() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(indoc! {r"
         MarkupSafe==2.1.3
         pip==21.3.1
@@ -429,6 +430,7 @@ fn show_empty_quiet() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: false
     exit_code: 1
@@ -464,6 +466,7 @@ fn show_editable() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
@@ -487,7 +490,6 @@ fn show_required_by_multiple() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(indoc! {r"
         anyio==4.0.0
         requests==2.31.0
@@ -526,6 +528,7 @@ fn show_required_by_multiple() -> Result<()> {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir), @r###"
     success: true
     exit_code: 0
diff --git a/crates/uv/tests/pip_sync.rs b/crates/uv/tests/pip_sync.rs
index b95f001cf..811a681f5 100644
--- a/crates/uv/tests/pip_sync.rs
+++ b/crates/uv/tests/pip_sync.rs
@@ -13,7 +13,7 @@ use indoc::indoc;
 use predicates::Predicate;
 use url::Url;
 
-use common::{create_bin_with_executables, create_venv, uv_snapshot, venv_to_interpreter};
+use common::{create_venv, python_path_with_versions, uv_snapshot, venv_to_interpreter};
 use uv_fs::Simplified;
 
 use crate::common::{copy_dir_all, get_bin, TestContext};
@@ -41,6 +41,7 @@ fn command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -61,6 +62,7 @@ fn uninstall_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -140,7 +142,6 @@ fn install() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -182,7 +183,6 @@ fn install_copy() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -218,7 +218,6 @@ fn install_hardlink() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -254,7 +253,6 @@ fn install_many() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -286,7 +284,6 @@ fn noop() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     command(&context)
@@ -320,7 +317,6 @@ fn link() -> Result<()> {
     let venv1 = &context.venv;
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     Command::new(get_bin())
@@ -336,8 +332,8 @@ fn link() -> Result<()> {
         .success();
 
     let venv2 = context.temp_dir.child(".venv2");
-    let bin = create_bin_with_executables(&context.temp_dir, &["3.12"])
-        .expect("Failed to create bin dir");
+    let python_path = python_path_with_versions(&context.temp_dir, &["3.12"])
+        .expect("Failed to create Python test path");
     Command::new(get_bin())
         .arg("venv")
         .arg(venv2.as_os_str())
@@ -345,7 +341,7 @@ fn link() -> Result<()> {
         .arg(context.cache_dir.path())
         .arg("--python")
         .arg("3.12")
-        .env("UV_TEST_PYTHON_PATH", bin)
+        .env("UV_TEST_PYTHON_PATH", python_path)
         .current_dir(&context.temp_dir)
         .assert()
         .success();
@@ -382,7 +378,6 @@ fn add_remove() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     command(&context)
@@ -392,7 +387,6 @@ fn add_remove() -> Result<()> {
         .success();
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("tomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -425,7 +419,6 @@ fn install_sequential() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     command(&context)
@@ -435,7 +428,6 @@ fn install_sequential() -> Result<()> {
         .success();
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -467,7 +459,6 @@ fn upgrade() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("tomli==2.0.0")?;
 
     command(&context)
@@ -477,7 +468,6 @@ fn upgrade() -> Result<()> {
         .success();
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("tomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -508,7 +498,6 @@ fn install_url() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ https://files.pythonhosted.org/packages/ff/1d/960bb4017c68674a1cb099534840f18d3def3ce44aed12b5ed8b78e0153e/Werkzeug-2.0.0-py3-none-any.whl")?;
 
     uv_snapshot!(command(&context)
@@ -538,7 +527,6 @@ fn install_git_commit() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ git+https://github.com/pallets/werkzeug.git@af160e0b6b7ddd81c22f1652c728ff5ac72d5c74")?;
 
     uv_snapshot!(command(&context)
@@ -568,7 +556,6 @@ fn install_git_tag() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ git+https://github.com/pallets/WerkZeug.git@2.0.0")?;
 
     uv_snapshot!(command(&context)
@@ -598,7 +585,6 @@ fn install_git_subdirectories() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("example-pkg-a @ git+https://github.com/pypa/sample-namespace-packages.git@df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45#subdirectory=pkg_resources/pkg_a\nexample-pkg-b @ git+https://github.com/pypa/sample-namespace-packages.git@df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45#subdirectory=pkg_resources/pkg_b")?;
 
     uv_snapshot!(command(&context)
@@ -630,7 +616,6 @@ fn install_sdist() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Werkzeug==0.9.6")?;
 
     uv_snapshot!(command(&context)
@@ -659,7 +644,6 @@ fn install_sdist_url() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("Werkzeug @ https://files.pythonhosted.org/packages/63/69/5702e5eb897d1a144001e21d676676bcb87b88c0862f947509ea95ea54fc/Werkzeug-0.9.6.tar.gz")?;
 
     uv_snapshot!(command(&context)
@@ -689,7 +673,6 @@ fn install_url_then_install_url() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ https://files.pythonhosted.org/packages/ff/1d/960bb4017c68674a1cb099534840f18d3def3ce44aed12b5ed8b78e0153e/Werkzeug-2.0.0-py3-none-any.whl")?;
 
     command(&context)
@@ -722,7 +705,6 @@ fn install_url_then_install_version() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ https://files.pythonhosted.org/packages/ff/1d/960bb4017c68674a1cb099534840f18d3def3ce44aed12b5ed8b78e0153e/Werkzeug-2.0.0-py3-none-any.whl")?;
 
     command(&context)
@@ -732,7 +714,6 @@ fn install_url_then_install_version() -> Result<()> {
         .success();
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug==2.0.0")?;
 
     uv_snapshot!(command(&context)
@@ -759,7 +740,6 @@ fn install_version_then_install_url() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug==2.0.0")?;
 
     command(&context)
@@ -769,7 +749,6 @@ fn install_version_then_install_url() -> Result<()> {
         .success();
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ https://files.pythonhosted.org/packages/ff/1d/960bb4017c68674a1cb099534840f18d3def3ce44aed12b5ed8b78e0153e/Werkzeug-2.0.0-py3-none-any.whl")?;
 
     uv_snapshot!(command(&context)
@@ -801,7 +780,6 @@ fn install_numpy_py38() -> Result<()> {
     let context = TestContext::new("3.8");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("numpy")?;
 
     uv_snapshot!(command(&context)
@@ -830,7 +808,6 @@ fn install_no_index() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -838,13 +815,14 @@ fn install_no_index() -> Result<()> {
         .arg("--no-index")
         .arg("--strict"), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Because markupsafe==2.1.3 was not found in the provided package locations and you require markupsafe==2.1.3, we can conclude that the requirements are unsatisfiable.
+      × No solution found when resolving dependencies:
+      ╰─▶ Because markupsafe==2.1.3 was not found in the provided package locations and you require markupsafe==2.1.3, we can conclude that the requirements are unsatisfiable.
 
-    hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -860,7 +838,6 @@ fn install_no_index_cached() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -890,13 +867,14 @@ fn install_no_index_cached() -> Result<()> {
         .arg("--no-index")
         .arg("--strict"), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Because markupsafe==2.1.3 was not found in the provided package locations and you require markupsafe==2.1.3, we can conclude that the requirements are unsatisfiable.
+      × No solution found when resolving dependencies:
+      ╰─▶ Because markupsafe==2.1.3 was not found in the provided package locations and you require markupsafe==2.1.3, we can conclude that the requirements are unsatisfiable.
 
-    hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
+          hint: Packages were unavailable because index lookups were disabled and no additional package locations were provided (try: `--find-links <uri>`)
     "###
     );
 
@@ -909,10 +887,8 @@ fn install_no_index_cached() -> Result<()> {
 fn warn_on_yanked_version() -> Result<()> {
     let context = TestContext::new("3.12");
 
-    let requirements_in = context.temp_dir.child("requirements.txt");
-    requirements_in.touch()?;
-
     // This version is yanked.
+    let requirements_in = context.temp_dir.child("requirements.txt");
     requirements_in.write_str("colorama==0.4.2")?;
 
     uv_snapshot!(context.filters(), windows_filters=false, command(&context)
@@ -1096,12 +1072,15 @@ fn mismatched_name() -> Result<()> {
         .arg("requirements.txt")
         .arg("--strict"), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Failed to read: foo @ file://[TEMP_DIR]/foo-2.0.1-py3-none-any.whl
-      Caused by: The .dist-info directory tomli-2.0.1 does not start with the normalized package name: foo
+      × No solution found when resolving dependencies:
+      ╰─▶ Because foo was found, but has an invalid format and you require foo, we can conclude that the requirements are unsatisfiable.
+
+          hint: The structure of foo was invalid:
+            The .dist-info directory tomli-2.0.1 does not start with the normalized package name: foo
     "###
     );
 
@@ -1160,7 +1139,6 @@ fn install_ujson() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("ujson @ https://files.pythonhosted.org/packages/43/1a/b0a027144aa5c8f4ea654f4afdd634578b450807bb70b9f8bad00d6f6d3c/ujson-5.7.0.tar.gz")?;
 
     uv_snapshot!(command(&context)
@@ -1200,7 +1178,6 @@ fn install_build_system_no_backend() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("build-system-no-backend @ https://files.pythonhosted.org/packages/ec/25/1e531108ca027dc3a3b37d351f4b86d811df4884c6a81cd99e73b8b589f5/build-system-no-backend-0.1.0.tar.gz")?;
 
     uv_snapshot!(command(&context)
@@ -1231,7 +1208,6 @@ fn install_url_source_dist_cached() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("tqdm @ https://files.pythonhosted.org/packages/62/06/d5604a70d160f6a6ca5fd2ba25597c24abd5c5ca5f437263d177ac242308/tqdm-4.66.1.tar.gz")?;
 
     let filters = if cfg!(windows) {
@@ -1329,7 +1305,6 @@ fn install_git_source_dist_cached() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ git+https://github.com/pallets/werkzeug.git@af160e0b6b7ddd81c22f1652c728ff5ac72d5c74")?;
 
     uv_snapshot!(command(&context)
@@ -1426,7 +1401,6 @@ fn install_registry_source_dist_cached() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("future==0.18.3")?;
 
     uv_snapshot!(command(&context)
@@ -1597,7 +1571,7 @@ fn install_path_source_dist_cached() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    Removed 4 files for wheel ([SIZE])
+    Removed 102 files for wheel ([SIZE])
     "###
     );
 
@@ -1704,7 +1678,7 @@ fn install_path_built_dist_cached() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    Removed 1 file for tomli ([SIZE])
+    Removed 2 files for tomli ([SIZE])
     "###
     );
 
@@ -1735,7 +1709,6 @@ fn install_url_built_dist_cached() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("tqdm @ https://files.pythonhosted.org/packages/00/e5/f12a80907d0884e6dff9c16d0c0114d81b8cd07dc3ae54c5e962cc83037e/tqdm-4.66.1-py3-none-any.whl")?;
 
     let filters = if cfg!(windows) {
@@ -1832,7 +1805,6 @@ fn duplicate_package_overlap() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\nMarkupSafe==2.1.2")?;
 
     uv_snapshot!(command(&context)
@@ -1857,7 +1829,6 @@ fn duplicate_package_disjoint() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\nMarkupSafe==2.1.2 ; python_version < '3.6'")?;
 
     uv_snapshot!(command(&context)
@@ -1884,7 +1855,6 @@ fn reinstall() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -1937,7 +1907,6 @@ fn reinstall_package() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -1990,7 +1959,6 @@ fn reinstall_git() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("werkzeug @ git+https://github.com/pallets/werkzeug.git@af160e0b6b7ddd81c22f1652c728ff5ac72d5c74")?;
 
     uv_snapshot!(command(&context)
@@ -2039,7 +2007,6 @@ fn refresh() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -2097,7 +2064,6 @@ fn refresh_package() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3\ntomli==2.0.1")?;
 
     uv_snapshot!(command(&context)
@@ -2461,7 +2427,7 @@ fn find_links() -> Result<()> {
     uv_snapshot!(context.filters(), command(&context)
         .arg("requirements.txt")
         .arg("--find-links")
-        .arg(context.workspace_root.join("scripts/wheels/")), @r###"
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -2494,7 +2460,7 @@ fn find_links_no_index_match() -> Result<()> {
         .arg("requirements.txt")
         .arg("--no-index")
         .arg("--find-links")
-        .arg(context.workspace_root.join("scripts/wheels/")), @r###"
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -2524,7 +2490,7 @@ fn find_links_offline_match() -> Result<()> {
         .arg("requirements.txt")
         .arg("--offline")
         .arg("--find-links")
-        .arg(context.workspace_root.join("scripts/wheels/")), @r###"
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -2555,15 +2521,113 @@ fn find_links_offline_no_match() -> Result<()> {
         .arg("requirements.txt")
         .arg("--offline")
         .arg("--find-links")
-        .arg(context.workspace_root.join("scripts/wheels/")), @r###"
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Because numpy was not found in the cache and you require numpy, we can conclude that the requirements are unsatisfiable.
+      × No solution found when resolving dependencies:
+      ╰─▶ Because numpy was not found in the cache and you require numpy, we can conclude that the requirements are unsatisfiable.
 
-    hint: Packages were unavailable because the network was disabled
+          hint: Packages were unavailable because the network was disabled
+    "###
+    );
+
+    Ok(())
+}
+
+/// Sync using `--find-links` with a local directory. Ensure that cached wheels are reused.
+#[test]
+fn find_links_wheel_cache() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc! {r"
+        tqdm==1000.0.0
+    "})?;
+
+    // Install `tqdm`.
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==1000.0.0
+    "###
+    );
+
+    // Reinstall `tqdm` with `--reinstall`. Ensure that the wheel is reused.
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - tqdm==1000.0.0
+     + tqdm==1000.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Sync using `--find-links` with a local directory. Ensure that cached source distributions are
+/// reused.
+#[test]
+fn find_links_source_cache() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(indoc! {r"
+        tqdm==999.0.0
+    "})?;
+
+    // Install `tqdm`.
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==999.0.0
+    "###
+    );
+
+    // Reinstall `tqdm` with `--reinstall`. Ensure that the wheel is reused.
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--find-links")
+        .arg(context.workspace_root.join("scripts/links/")), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - tqdm==999.0.0
+     + tqdm==999.0.0
     "###
     );
 
@@ -2582,13 +2646,14 @@ fn offline() -> Result<()> {
         .arg("requirements.in")
         .arg("--offline"), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Because black==23.10.1 was not found in the cache and you require black==23.10.1, we can conclude that the requirements are unsatisfiable.
+      × No solution found when resolving dependencies:
+      ╰─▶ Because black==23.10.1 was not found in the cache and you require black==23.10.1, we can conclude that the requirements are unsatisfiable.
 
-    hint: Packages were unavailable because the network was disabled
+          hint: Packages were unavailable because the network was disabled
     "###
     );
 
@@ -2730,7 +2795,6 @@ fn pip_entrypoints() -> Result<()> {
     // TODO(konstin): Remove git dep when the next pip version is released.
     for pip_requirement in ["pip==24.0", "pip @ git+https://github.com/pypa/pip"] {
         let requirements_txt = context.temp_dir.child("requirements.txt");
-        requirements_txt.touch()?;
         requirements_txt.write_str(pip_requirement)?;
 
         command(&context)
@@ -2842,7 +2906,6 @@ fn compile() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     uv_snapshot!(command(&context)
@@ -2941,14 +3004,14 @@ requires-python = "<=3.5"
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str(&format!("-e {}", editable_dir.path().display()))?;
 
-    uv_snapshot!(command(&context)
+    uv_snapshot!(context.filters(), command(&context)
         .arg("requirements.in"), @r###"
     success: false
     exit_code: 2
     ----- stdout -----
 
     ----- stderr -----
-    error: Editable `example` requires Python <=3.5, but 3.12.1 is installed
+    error: Editable `example` requires Python <=3.5, but 3.12.[X] is installed
     "###
     );
 
@@ -3012,12 +3075,1553 @@ requires-python = "<=3.5"
     uv_snapshot!(context.filters(), command(&context)
         .arg("requirements.in"), @r###"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
-    error: Because the current Python version (3.12.1) does not satisfy Python<=3.5 and example==0.0.0 depends on Python<=3.5, we can conclude that example==0.0.0 cannot be used.
-    And because only example==0.0.0 is available and you require example, we can conclude that the requirements are unsatisfiable.
+      × No solution found when resolving dependencies:
+      ╰─▶ Because the current Python version (3.12.[X]) does not satisfy Python<=3.5 and example==0.0.0 depends on Python<=3.5, we can conclude that example==0.0.0 cannot be used.
+          And because only example==0.0.0 is available and you require example, we can conclude that the requirements are unsatisfiable.
+    "###
+    );
+
+    Ok(())
+}
+
+/// Omit the hash with `--require-hashes`.
+#[test]
+fn require_hashes_missing_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("anyio==4.0.0")?;
+
+    // Install without error when `--require-hashes` is omitted.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    // Error when `--require-hashes` is provided.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have a hash, but none were provided for: anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Omit the version with `--require-hashes`.
+#[test]
+fn require_hashes_missing_version() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(
+        "anyio --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+    )?;
+
+    // Install without error when `--require-hashes` is omitted.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.3.0
+    "###
+    );
+
+    // Error when `--require-hashes` is provided.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: anyio
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for _just_ the wheel with `--no-binary`.
+#[test]
+fn require_hashes_wheel_no_binary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--no-binary")
+        .arg(":all:")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio==4.0.0
+      Caused by: Hash mismatch for anyio==4.0.0
+
+    Expected:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for _just_ the wheel with `--only-binary`.
+#[test]
+fn require_hashes_wheel_only_binary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--only-binary")
+        .arg(":all:")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for _just_ the source distribution with `--no-binary`.
+#[test]
+fn require_hashes_source_no_binary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--no-binary")
+        .arg(":all:")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for _just_ the source distribution, with `--binary-only`.
+#[test]
+fn require_hashes_source_only_binary() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--only-binary")
+        .arg(":all:")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio==4.0.0
+      Caused by: Hash mismatch for anyio==4.0.0
+
+    Expected:
+      sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+
+    Computed:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the correct hash algorithm, but the wrong digest.
+#[test]
+fn require_hashes_wrong_digest() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio==4.0.0
+      Caused by: Hash mismatch for anyio==4.0.0
+
+    Expected:
+      sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the correct hash, but the wrong algorithm.
+#[test]
+fn require_hashes_wrong_algorithm() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha512:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio==4.0.0
+      Caused by: Hash mismatch for anyio==4.0.0
+
+    Expected:
+      sha512:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha512:f30761c1e8725b49c498273b90dba4b05c0fd157811994c806183062cb6647e773364ce45f0e1ff0b10e32fe6d0232ea5ad39476ccf37109d6b49603a09c11c2
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for a source distribution specified as a direct URL dependency.
+#[test]
+fn require_hashes_source_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz)
+    "###
+    );
+
+    // Reinstall with the right hash, and verify that it's reused.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0 (from https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz)
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz)
+    "###
+    );
+
+    // Reinstall with the wrong hash, and verify that it's rejected despite being cached.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz --hash=sha256:a7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download and build: anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz
+      Caused by: Hash mismatch for anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz
+
+    Expected:
+      sha256:a7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+
+    Computed:
+      sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the _wrong_ hash for a source distribution specified as a direct URL dependency.
+#[test]
+fn require_hashes_source_url_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz --hash=sha256:a7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download and build: anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz
+      Caused by: Hash mismatch for anyio @ https://files.pythonhosted.org/packages/74/17/5075225ee1abbb93cd7fc30a2d343c6a3f5f71cf388f14768a7a38256581/anyio-4.0.0.tar.gz
+
+    Expected:
+      sha256:a7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+
+    Computed:
+      sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for a built distribution specified as a direct URL dependency.
+#[test]
+fn require_hashes_wheel_url() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    // Reinstall with the right hash, and verify that it's reused.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    // Reinstall with the wrong hash, and verify that it's rejected despite being cached.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+      Caused by: Hash mismatch for anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+
+    Expected:
+      sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    "###
+    );
+
+    // Sync a new dependency and include the wrong hash for anyio. Verify that we reuse anyio
+    // despite the wrong hash, like pip, since we don't validate hashes for already-installed
+    // distributions.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f\niniconfig==2.0.0 --hash=sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + iniconfig==2.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the _wrong_ hash for a built distribution specified as a direct URL dependency.
+#[test]
+fn require_hashes_wheel_url_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+      Caused by: Hash mismatch for anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+
+    Expected:
+      sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    "###
+    );
+
+    Ok(())
+}
+
+/// Reject Git dependencies when `--require-hashes` is provided.
+#[test]
+fn require_hashes_git() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio @ git+https://github.com/agronholm/anyio@4a23745badf5bf5ef7928f1e346e9986bd696d82 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download and build: anyio @ git+https://github.com/agronholm/anyio@4a23745badf5bf5ef7928f1e346e9986bd696d82
+      Caused by: Hash-checking is not supported for Git repositories: anyio @ git+https://github.com/agronholm/anyio@4a23745badf5bf5ef7928f1e346e9986bd696d82
+    "###
+    );
+
+    Ok(())
+}
+
+/// Reject local directory dependencies when `--require-hashes` is provided.
+#[test]
+fn require_hashes_source_tree() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&format!(
+        "black @ {} --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a",
+        context
+            .workspace_root
+            .join("scripts/packages/black_editable")
+            .display()
+    ))?;
+
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to build: black @ file://[WORKSPACE]/scripts/packages/black_editable
+      Caused by: Hash-checking is not supported for local directories: black @ file://[WORKSPACE]/scripts/packages/black_editable
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for _just_ the wheel with `--only-binary`.
+#[test]
+fn require_hashes_re_download() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("anyio==4.0.0")?;
+
+    // Install without `--require-hashes`.
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    // Reinstall with `--require-hashes`, and the wrong hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio==4.0.0
+      Caused by: Hash mismatch for anyio==4.0.0
+
+    Expected:
+      sha256:afdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    "###
+    );
+
+    // Reinstall with `--require-hashes`, and the right hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0
+     + anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for a built distribution specified as a local path dependency.
+#[test]
+fn require_hashes_wheel_path() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&format!(
+        "tqdm @ {} --hash=sha256:a34996d4bd5abb2336e14ff0a2d22b92cfd0f0ed344e6883041ce01953276a13",
+        context
+            .workspace_root
+            .join("scripts/links/tqdm-1000.0.0-py3-none-any.whl")
+            .display()
+    ))?;
+
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==1000.0.0 (from file://[WORKSPACE]/scripts/links/tqdm-1000.0.0-py3-none-any.whl)
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the _wrong_ hash for a built distribution specified as a local path dependency.
+#[test]
+fn require_hashes_wheel_path_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&format!(
+        "tqdm @ {} --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+        context
+            .workspace_root
+            .join("scripts/links/tqdm-1000.0.0-py3-none-any.whl")
+            .display()
+    ))?;
+
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: tqdm @ file://[WORKSPACE]/scripts/links/tqdm-1000.0.0-py3-none-any.whl
+      Caused by: Hash mismatch for tqdm @ file://[WORKSPACE]/scripts/links/tqdm-1000.0.0-py3-none-any.whl
+
+    Expected:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:a34996d4bd5abb2336e14ff0a2d22b92cfd0f0ed344e6883041ce01953276a13
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the hash for a source distribution specified as a local path dependency.
+#[test]
+fn require_hashes_source_path() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&format!(
+        "tqdm @ {} --hash=sha256:89fa05cffa7f457658373b85de302d24d0c205ceda2819a8739e324b75e9430b",
+        context
+            .workspace_root
+            .join("scripts/links/tqdm-999.0.0.tar.gz")
+            .display()
+    ))?;
+
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + tqdm==999.0.0 (from file://[WORKSPACE]/scripts/links/tqdm-999.0.0.tar.gz)
+    "###
+    );
+
+    Ok(())
+}
+
+/// Include the _wrong_ hash for a source distribution specified as a local path dependency.
+#[test]
+fn require_hashes_source_path_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&format!(
+        "tqdm @ {} --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f",
+        context
+            .workspace_root
+            .join("scripts/links/tqdm-999.0.0.tar.gz")
+            .display()
+    ))?;
+
+    uv_snapshot!(context.filters(), command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to build: tqdm @ file://[WORKSPACE]/scripts/links/tqdm-999.0.0.tar.gz
+      Caused by: Hash mismatch for tqdm @ file://[WORKSPACE]/scripts/links/tqdm-999.0.0.tar.gz
+
+    Expected:
+      sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+
+    Computed:
+      sha256:89fa05cffa7f457658373b85de302d24d0c205ceda2819a8739e324b75e9430b
+    "###
+    );
+
+    Ok(())
+}
+
+/// We allow `--require-hashes` for direct URL dependencies.
+#[test]
+fn require_hashes_unnamed() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! {r"
+            https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+        "} )?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    Ok(())
+}
+
+/// We allow `--require-hashes` for editables, as long as no dependencies are included.
+#[test]
+fn require_hashes_editable() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str(&indoc::formatdoc! {r"
+        -e file://{workspace_root}/scripts/packages/black_editable[d]
+        ",
+        workspace_root = context.workspace_root.simplified_display(),
+    })?;
+
+    // Install the editable packages.
+    uv_snapshot!(context.filters(), command(&context)
+        .arg(requirements_txt.path())
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Built 1 editable in [TIME]
+    Installed 1 package in [TIME]
+     + black==0.1.0 (from file://[WORKSPACE]/scripts/packages/black_editable)
+    "###
+    );
+
+    Ok(())
+}
+
+/// If a dependency is repeated, the hash should be required for both instances.
+#[test]
+fn require_hashes_repeated_dependency() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a\nanyio")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: anyio
+    "###
+    );
+
+    // Reverse the order.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio\nanyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: In `--require-hashes` mode, all requirement must have their versions pinned with `==`, but found: anyio
+    "###
+    );
+
+    Ok(())
+}
+
+/// If a dependency is repeated, use the last hash provided. pip seems to use the _first_ hash.
+#[test]
+fn require_hashes_repeated_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Use the same hash in both cases.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! { r"
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+    " })?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    // Use a different hash, but both are correct.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! { r"
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:cfdb2b588b9fc25ede96d8db56ed50848b0b649dca3dd1df0b11f683bb9e0b5f
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha512:f30761c1e8725b49c498273b90dba4b05c0fd157811994c806183062cb6647e773364ce45f0e1ff0b10e32fe6d0232ea5ad39476ccf37109d6b49603a09c11c2
+    " })?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--reinstall"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    // Use a different hash. The first hash is wrong, but that's fine, since we use the last hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! { r"
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:a7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=md5:420d85e19168705cdf0223621b18831a
+    " })?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--reinstall"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+     + anyio==4.0.0 (from https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl)
+    "###
+    );
+
+    // Use a different hash. The second hash is wrong. This should fail, since we use the last hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str(indoc::indoc! { r"
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a
+            anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl --hash=md5:520d85e19168705cdf0223621b18831a
+    " })?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--reinstall"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+      Caused by: Hash mismatch for anyio @ https://files.pythonhosted.org/packages/36/55/ad4de788d84a630656ece71059665e01ca793c04294c463fd84132f40fe6/anyio-4.0.0-py3-none-any.whl
+
+    Expected:
+      md5:520d85e19168705cdf0223621b18831a
+
+    Computed:
+      md5:420d85e19168705cdf0223621b18831a
+    "###
+    );
+
+    Ok(())
+}
+
+/// If a dependency is repeated, the hash should be required for both instances.
+#[test]
+fn require_hashes_at_least_one() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Request `anyio` with a `sha256` hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.0.0
+    "###
+    );
+
+    // Reinstall, requesting both `sha256` and `sha512`. We should reinstall from the cache, since
+    // at least one hash matches.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a --hash=md5:420d85e19168705cdf0223621b18831a")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0
+     + anyio==4.0.0
+    "###
+    );
+
+    // This should be true even if the second hash is wrong.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("anyio==4.0.0 --hash=sha256:f7ed51751b2c2add651e5747c891b47e26d2a21be5d32d9311dfe9692f3e5d7a --hash=md5:1234")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - anyio==4.0.0
+     + anyio==4.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--find-links`, but the registry doesn't provide us with a hash.
+#[test]
+fn require_hashes_find_links_no_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // First, use the correct hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/no-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    // Second, use an incorrect hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("example-a-961b4c22==1.0.0 --hash=sha256:123")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/no-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:123
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Third, use the hash from the source distribution. This will actually fail, when it _could_
+    // succeed, but pip has the same behavior.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:294e788dbe500fdc39e8b88e82652ab67409a1dc9dd06543d0fe0ae31b713eb3")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/no-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:294e788dbe500fdc39e8b88e82652ab67409a1dc9dd06543d0fe0ae31b713eb3
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Fourth, use the hash from the source distribution, and disable wheels. This should succeed.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:294e788dbe500fdc39e8b88e82652ab67409a1dc9dd06543d0fe0ae31b713eb3")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--no-binary")
+        .arg(":all:")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/no-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - example-a-961b4c22==1.0.0
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--find-links`, and the registry serves us a correct hash.
+#[test]
+fn require_hashes_find_links_valid_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/valid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--find-links`, and the registry serves us an incorrect hash.
+#[test]
+fn require_hashes_find_links_invalid_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // First, request some other hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("example-a-961b4c22==1.0.0 --hash=sha256:123")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/invalid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:123
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Second, request the invalid hash, that the registry _thinks_ is correct. We should reject it.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:8838f9d005ff0432b258ba648d9cabb1cbdf06ac29d14f788b02edae544032ea")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/invalid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:8838f9d005ff0432b258ba648d9cabb1cbdf06ac29d14f788b02edae544032ea
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Third, request the correct hash, that the registry _thinks_ is correct. We should accept
+    // it, since it's already cached under this hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/invalid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Installed 1 package in [TIME]
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    // Fourth, request the correct hash, that the registry _thinks_ is correct, but without the
+    // cache. We _should_ accept it, but we currently don't.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--refresh")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/invalid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - example-a-961b4c22==1.0.0
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    // Finally, request the correct hash, along with the incorrect hash for the source distribution.
+    // Resolution will fail, since the incorrect hash matches the registry's hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e --hash=sha256:a3cf07a05aac526131a2e8b6e4375ee6c6eaac8add05b88035e960ac6cd999ee")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--refresh")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://raw.githubusercontent.com/astral-test/astral-test-hash/main/invalid-hash/simple-html/example-a-961b4c22/index.html"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download and build: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+      sha256:a3cf07a05aac526131a2e8b6e4375ee6c6eaac8add05b88035e960ac6cd999ee
+
+    Computed:
+      sha256:294e788dbe500fdc39e8b88e82652ab67409a1dc9dd06543d0fe0ae31b713eb3
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--index-url`, but the registry doesn't provide us with a hash.
+#[test]
+fn require_hashes_registry_no_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/no-hash/simple-html/"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--index-url`, and the registry serves us a correct hash.
+#[test]
+fn require_hashes_registry_valid_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--require-hashes")
+        .arg("--find-links")
+        .arg("https://astral-test.github.io/astral-test-hash/valid-hash/simple-html/"), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+      × No solution found when resolving dependencies:
+      ╰─▶ Because example-a-961b4c22==1.0.0 was not found in the package registry and you require example-a-961b4c22==1.0.0, we can conclude that the requirements are unsatisfiable.
+    "###
+    );
+
+    Ok(())
+}
+
+/// Using `--index-url`, and the registry serves us an incorrect hash.
+#[test]
+fn require_hashes_registry_invalid_hash() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // First, request some other hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt.write_str("example-a-961b4c22==1.0.0 --hash=sha256:123")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/invalid-hash/simple-html/"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:123
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Second, request the invalid hash, that the registry _thinks_ is correct. We should reject it.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:8838f9d005ff0432b258ba648d9cabb1cbdf06ac29d14f788b02edae544032ea")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/invalid-hash/simple-html/"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    error: Failed to download distributions
+      Caused by: Failed to fetch wheel: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:8838f9d005ff0432b258ba648d9cabb1cbdf06ac29d14f788b02edae544032ea
+
+    Computed:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+    "###
+    );
+
+    // Third, request the correct hash, that the registry _thinks_ is correct. We should accept
+    // it, since it's already cached under this hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/invalid-hash/simple-html/"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Installed 1 package in [TIME]
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    // Fourth, request the correct hash, that the registry _thinks_ is correct, but without the
+    // cache. We _should_ accept it, but we currently don't.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--refresh")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/invalid-hash/simple-html/"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Downloaded 1 package in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 1 package in [TIME]
+     - example-a-961b4c22==1.0.0
+     + example-a-961b4c22==1.0.0
+    "###
+    );
+
+    // Finally, request the correct hash, along with the incorrect hash for the source distribution.
+    // Resolution will fail, since the incorrect hash matches the registry's hash.
+    let requirements_txt = context.temp_dir.child("requirements.txt");
+    requirements_txt
+        .write_str("example-a-961b4c22==1.0.0 --hash=sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e --hash=sha256:a3cf07a05aac526131a2e8b6e4375ee6c6eaac8add05b88035e960ac6cd999ee")?;
+
+    uv_snapshot!(command(&context)
+        .arg("requirements.txt")
+        .arg("--refresh")
+        .arg("--reinstall")
+        .arg("--require-hashes")
+        .arg("--index-url")
+        .arg("https://astral-test.github.io/astral-test-hash/invalid-hash/simple-html/"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to download and build: example-a-961b4c22==1.0.0
+      Caused by: Hash mismatch for example-a-961b4c22==1.0.0
+
+    Expected:
+      sha256:5d69f0b590514103234f0c3526563856f04d044d8d0ea1073a843ae429b3187e
+      sha256:a3cf07a05aac526131a2e8b6e4375ee6c6eaac8add05b88035e960ac6cd999ee
+
+    Computed:
+      sha256:294e788dbe500fdc39e8b88e82652ab67409a1dc9dd06543d0fe0ae31b713eb3
     "###
     );
 
diff --git a/crates/uv/tests/pip_uninstall.rs b/crates/uv/tests/pip_uninstall.rs
index df3f44251..b6808afb9 100644
--- a/crates/uv/tests/pip_uninstall.rs
+++ b/crates/uv/tests/pip_uninstall.rs
@@ -19,6 +19,7 @@ fn uninstall_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -39,6 +40,7 @@ fn sync_command(context: &TestContext) -> Command {
         .arg("--cache-dir")
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -125,7 +127,6 @@ fn missing_requirements_txt() -> Result<()> {
 fn invalid_requirements_txt_requirement() -> Result<()> {
     let temp_dir = assert_fs::TempDir::new()?;
     let requirements_txt = temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("flask==1.0.x")?;
 
     uv_snapshot!(Command::new(get_bin())
@@ -153,7 +154,6 @@ fn uninstall() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     sync_command(&context)
@@ -195,7 +195,6 @@ fn missing_record() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("MarkupSafe==2.1.3")?;
 
     sync_command(&context)
@@ -233,7 +232,6 @@ fn uninstall_editable_by_name() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(&format!(
         "-e {}",
         context
@@ -281,7 +279,6 @@ fn uninstall_by_path() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(
         context
             .workspace_root
@@ -329,7 +326,6 @@ fn uninstall_duplicate_by_path() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let requirements_txt = context.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str(
         context
             .workspace_root
@@ -381,7 +377,6 @@ fn uninstall_duplicate() -> Result<()> {
     // Sync a version of `pip` into a virtual environment.
     let context1 = TestContext::new("3.12");
     let requirements_txt = context1.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("pip==21.3.1")?;
 
     // Run `pip sync`.
@@ -393,7 +388,6 @@ fn uninstall_duplicate() -> Result<()> {
     // Sync a different version of `pip` into a virtual environment.
     let context2 = TestContext::new("3.12");
     let requirements_txt = context2.temp_dir.child("requirements.txt");
-    requirements_txt.touch()?;
     requirements_txt.write_str("pip==22.1.1")?;
 
     // Run `pip sync`.
diff --git a/crates/uv/tests/self_update.rs b/crates/uv/tests/self_update.rs
new file mode 100644
index 000000000..277f98799
--- /dev/null
+++ b/crates/uv/tests/self_update.rs
@@ -0,0 +1,41 @@
+#![cfg(feature = "self-update")]
+
+use crate::common::get_bin;
+use axoupdater::{
+    test::helpers::{perform_runtest, RuntestArgs},
+    ReleaseSourceType,
+};
+use std::process::Command;
+
+mod common;
+
+#[test]
+fn check_self_update() {
+    // To maximally emulate behaviour in practice, this test actually modifies CARGO_HOME
+    // and therefore should only be run in CI by default, where it can't hurt developers.
+    // We use the "CI" env-var that CI machines tend to run
+    if std::env::var("CI").map(|s| s.is_empty()).unwrap_or(true) {
+        return;
+    }
+
+    // Configure the runtest
+    let args = RuntestArgs {
+        app_name: "uv".to_owned(),
+        package: "uv".to_owned(),
+        owner: "astral-sh".to_owned(),
+        bin: get_bin(),
+        binaries: vec!["uv".to_owned()],
+        args: vec!["self".to_owned(), "update".to_owned()],
+        release_type: ReleaseSourceType::GitHub,
+    };
+
+    // install and update the application
+    let installed_bin = perform_runtest(&args);
+
+    // check that the binary works like normal
+    let status = Command::new(installed_bin)
+        .arg("--version")
+        .status()
+        .expect("failed to run 'uv --version'");
+    assert!(status.success(), "'uv --version' returned non-zero");
+}
diff --git a/crates/uv/tests/venv.rs b/crates/uv/tests/venv.rs
index 94e79ae79..26e098300 100644
--- a/crates/uv/tests/venv.rs
+++ b/crates/uv/tests/venv.rs
@@ -1,7 +1,7 @@
 #![cfg(feature = "python")]
 
-use std::ffi::OsString;
 use std::process::Command;
+use std::{ffi::OsString, str::FromStr};
 
 use anyhow::Result;
 use assert_cmd::prelude::*;
@@ -9,10 +9,9 @@ use assert_fs::fixture::ChildPath;
 use assert_fs::prelude::*;
 use fs_err::PathExt;
 use uv_fs::Simplified;
+use uv_toolchain::PythonVersion;
 
-use crate::common::{
-    create_bin_with_executables, get_bin, uv_snapshot, TestContext, EXCLUDE_NEWER,
-};
+use crate::common::{get_bin, python_path_with_versions, uv_snapshot, TestContext, EXCLUDE_NEWER};
 
 mod common;
 
@@ -20,20 +19,28 @@ struct VenvTestContext {
     cache_dir: assert_fs::TempDir,
     temp_dir: assert_fs::TempDir,
     venv: ChildPath,
-    bin: OsString,
+    python_path: OsString,
+    python_versions: Vec<PythonVersion>,
 }
 
 impl VenvTestContext {
     fn new(python_versions: &[&str]) -> Self {
         let temp_dir = assert_fs::TempDir::new().unwrap();
-        let bin = create_bin_with_executables(&temp_dir, python_versions)
-            .expect("Failed to create bin dir");
+        let python_path = python_path_with_versions(&temp_dir, python_versions)
+            .expect("Failed to create Python test path");
         let venv = temp_dir.child(".venv");
+        let python_versions = python_versions
+            .iter()
+            .map(|version| {
+                PythonVersion::from_str(version).expect("Tests should use valid Python versions")
+            })
+            .collect::<Vec<_>>();
         Self {
             cache_dir: assert_fs::TempDir::new().unwrap(),
             temp_dir,
             venv,
-            bin,
+            python_path,
+            python_versions,
         }
     }
 
@@ -45,7 +52,7 @@ impl VenvTestContext {
             .arg(self.cache_dir.path())
             .arg("--exclude-newer")
             .arg(EXCLUDE_NEWER)
-            .env("UV_TEST_PYTHON_PATH", self.bin.clone())
+            .env("UV_TEST_PYTHON_PATH", self.python_path.clone())
             .current_dir(self.temp_dir.path());
         command
     }
@@ -70,6 +77,25 @@ impl VenvTestContext {
             r"Activate with: (?:.*)\\Scripts\\activate".to_string(),
             "Activate with: source .venv/bin/activate".to_string(),
         ));
+
+        // Add Python patch version filtering unless one was explicitly requested to ensure
+        // snapshots are patch version agnostic when it is not a part of the test.
+        if self
+            .python_versions
+            .iter()
+            .all(|version| version.patch().is_none())
+        {
+            for python_version in &self.python_versions {
+                filters.push((
+                    format!(
+                        r"({})\.\d+",
+                        regex::escape(python_version.to_string().as_str())
+                    ),
+                    "$1.[X]".to_string(),
+                ));
+            }
+        }
+
         filters
     }
 }
@@ -88,7 +114,7 @@ fn create_venv() {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -107,7 +133,7 @@ fn create_venv() {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -128,7 +154,7 @@ fn create_venv_defaults_to_cwd() {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -151,7 +177,7 @@ fn seed() {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
      + pip==24.0
     Activate with: source .venv/bin/activate
@@ -175,7 +201,7 @@ fn seed_older_python_version() {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.10.13 interpreter at: [PATH]
+    Using Python 3.10.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
      + pip==24.0
      + setuptools==69.2.0
@@ -253,6 +279,7 @@ fn create_venv_unknown_python_patch() {
     context.venv.assert(predicates::path::missing());
 }
 
+#[cfg(feature = "python-patch")]
 #[test]
 fn create_venv_python_patch() {
     let context = VenvTestContext::new(&["3.12.1"]);
@@ -293,7 +320,7 @@ fn file_exists() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     uv::venv::creation
 
@@ -321,7 +348,7 @@ fn empty_dir_exists() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -350,7 +377,7 @@ fn non_empty_dir_exists() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     uv::venv::creation
 
@@ -368,9 +395,9 @@ fn windows_shims() -> Result<()> {
     let context = VenvTestContext::new(&["3.9", "3.8"]);
     let shim_path = context.temp_dir.child("shim");
 
-    let py38 = std::env::split_paths(&context.bin)
+    let py38 = std::env::split_paths(&context.python_path)
         .last()
-        .expect("create_bin_with_executables to set up the python versions");
+        .expect("python_path_with_versions to set up the python versions");
     // We want 3.8 and the first version should be 3.9.
     // Picking the last is necessary to prove that shims work because the python version selects
     // the python version from the first path segment by default, so we take the last to prove it's not
@@ -388,14 +415,14 @@ fn windows_shims() -> Result<()> {
     uv_snapshot!(context.filters(), context.venv_command()
         .arg(context.venv.as_os_str())
         .arg("--clear")
-        .env("UV_TEST_PYTHON_PATH", format!("{};{}", shim_path.display(), context.bin.simplified_display())), @r###"
+        .env("UV_TEST_PYTHON_PATH", format!("{};{}", shim_path.display(), context.python_path.simplified_display())), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
 
     ----- stderr -----
     warning: virtualenv's `--clear` has no effect (uv always clears the virtual environment).
-    Using Python 3.8.12 interpreter at: [PATH]
+    Using Python 3.8.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -422,7 +449,7 @@ fn virtualenv_compatibility() {
 
     ----- stderr -----
     warning: virtualenv's `--clear` has no effect (uv always clears the virtual environment).
-    Using Python 3.12.1 interpreter at: [PATH]
+    Using Python 3.12.[X] interpreter at: [PATH]
     Creating virtualenv at: .venv
     Activate with: source .venv/bin/activate
     "###
@@ -482,6 +509,7 @@ fn verify_nested_pyvenv_cfg() -> Result<()> {
         .arg("--python")
         .arg("3.12")
         .env("VIRTUAL_ENV", context.venv.as_os_str())
+        .env("UV_NO_WRAP", "1")
         .assert()
         .success();
 
diff --git a/pyproject.toml b/pyproject.toml
index e8801643a..b4126bac9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "uv"
-version = "0.1.28"
+version = "0.1.31"
 description = "An extremely fast Python package installer and resolver, written in Rust."
 authors = [{ name = "Astral Software Inc.", email = "hey@astral.sh" }]
 requires-python = ">=3.8"
@@ -41,7 +41,7 @@ manifest-path = "crates/uv/Cargo.toml"
 module-name = "uv"
 python-source = "python"
 strip = true
-include = ["rust-toolchain.toml"]
+include = [{ path = "rust-toolchain.toml", format = ["sdist", "wheel"] }, { path = "LICENSE-APACHE", format = "sdist" }, { path = "LICENSE-MIT", format = "sdist" }]
 
 [tool.rooster]
 major_labels = []  # We do not use the major version number
diff --git a/scripts/bench/__main__.py b/scripts/bench/__main__.py
index a08c1ff31..8e87c262f 100644
--- a/scripts/bench/__main__.py
+++ b/scripts/bench/__main__.py
@@ -1,11 +1,11 @@
 """Benchmark uv against other packaging tools.
 
-This script assumes that `pip`, `pip-tools`, `virtualenv`, `poetry` and `hyperfine` are
-installed, and that a uv release builds exists at `./target/release/uv`
-(relative to the repository root).
-
 This script assumes that Python 3.12 is installed.
 
+By default, this script also assumes that `pip`, `pip-tools`, `virtualenv`, `poetry` and
+`hyperfine` are installed, and that a uv release builds exists at `./target/release/uv`
+(relative to the repository root). However, the set of tools is configurable.
+
 To set up the required environment, run:
 
     cargo build --release
@@ -13,17 +13,51 @@ To set up the required environment, run:
     source .venv/bin/activate
     ./target/release/uv pip sync ./scripts/bench/requirements.txt
 
-Example usage:
+Then, to benchmark uv against `pip-tools`:
 
     python -m scripts.bench --uv --pip-compile requirements.in
 
-Multiple versions of uv can be benchmarked by specifying the path to the binary for
-each build, as in:
+It's most common to benchmark multiple uv versions against one another by building
+from multiple branches and specifying the path to each binary, as in:
 
+    # Build the baseline version.
+    git checkout main
+    cargo build --release
+    mv ./target/release/uv ./target/release/baseline
+
+    # Build the feature version.
+    git checkout feature
+    cargo build --release
+
+    # Run the benchmark.
     python -m scripts.bench \
         --uv-path ./target/release/uv \
         --uv-path ./target/release/baseline \
         requirements.in
+
+By default, the script will run the resolution benchmarks when a `requirements.in` file
+is provided, and the installation benchmarks when a `requirements.txt` file is provided:
+
+    # Run the resolution benchmarks against the Trio project.
+    python -m scripts.bench \
+        --uv-path ./target/release/uv \
+        --uv-path ./target/release/baseline \
+        ./scripts/requirements/trio.in
+
+    # Run the installation benchmarks against the Trio project.
+    python -m scripts.bench \
+        --uv-path ./target/release/uv \
+        --uv-path ./target/release/baseline \
+        ./scripts/requirements/compiled/trio.txt
+
+You can also specify the benchmark to run explicitly:
+
+    # Run the "uncached install" benchmark against the Trio project.
+    python -m scripts.bench \
+        --uv-path ./target/release/uv \
+        --uv-path ./target/release/baseline \
+        --benchmark install-cold \
+        ./scripts/requirements/compiled/trio.txt
 """
 
 import abc
diff --git a/scripts/bootstrap/install.py b/scripts/bootstrap/install.py
deleted file mode 100755
index ce7cc1460..000000000
--- a/scripts/bootstrap/install.py
+++ /dev/null
@@ -1,204 +0,0 @@
-#!/usr/bin/env python3
-# /// script
-# requires-python = ">=3.11"
-# dependencies = [
-#   "zstandard==0.22.0",
-# ]
-# ///
-#
-# Download required Python versions and install to `bin`
-# Uses prebuilt Python distributions from indygreg/python-build-standalone
-#
-# This script can be run without Python installed via `install.sh`
-#
-# Requirements
-#
-#   pip install zstandard==0.22.0
-#
-# Usage
-#
-#   python scripts/bootstrap/install.py
-#
-# Or
-#
-#   pipx run scripts/bootstrap/install.py
-#
-# The Python versions are installed from `.python_versions`.
-# Python versions are linked in-order such that the _last_ defined version will be the default.
-#
-# Version metadata can be updated with `fetch-version-metadata.py`
-
-import concurrent.futures
-import hashlib
-import json
-import os
-import platform
-import shutil
-import sys
-import sysconfig
-import tarfile
-import tempfile
-import urllib.parse
-import urllib.request
-from pathlib import Path
-
-try:
-    import zstandard
-except ImportError:
-    print("ERROR: zstandard is required; install with `pip install zstandard==0.22.0`")
-    sys.exit(1)
-
-# Setup some file paths
-THIS_DIR = Path(__file__).parent
-ROOT_DIR = THIS_DIR.parent.parent
-if bin_dir := os.environ.get("UV_BOOTSTRAP_DIR"):
-    BIN_DIR = Path(bin_dir)
-else:
-    BIN_DIR = ROOT_DIR / "bin"
-INSTALL_DIR = BIN_DIR / "versions"
-VERSIONS_FILE = ROOT_DIR / ".python-versions"
-VERSIONS_METADATA_FILE = THIS_DIR / "versions.json"
-
-# Map system information to those in the versions metadata
-ARCH_MAP = {"aarch64": "arm64", "amd64": "x86_64"}
-PLATFORM_MAP = {"win32": "windows"}
-PLATFORM = sys.platform
-ARCH = platform.machine().lower()
-INTERPRETER = "cpython"
-
-
-def decompress_file(archive_path: Path, output_path: Path):
-    if str(archive_path).endswith(".tar.zst"):
-        dctx = zstandard.ZstdDecompressor()
-
-        with tempfile.TemporaryFile(suffix=".tar") as ofh:
-            with archive_path.open("rb") as ifh:
-                dctx.copy_stream(ifh, ofh)
-            ofh.seek(0)
-            with tarfile.open(fileobj=ofh) as z:
-                z.extractall(output_path)
-    else:
-        raise ValueError(f"Unknown archive type {archive_path.suffix}")
-
-
-def sha256_file(path: Path):
-    h = hashlib.sha256()
-
-    with open(path, "rb") as file:
-        while True:
-            # Reading is buffered, so we can read smaller chunks.
-            chunk = file.read(h.block_size)
-            if not chunk:
-                break
-            h.update(chunk)
-
-    return h.hexdigest()
-
-
-versions_metadata = json.loads(VERSIONS_METADATA_FILE.read_text())
-versions = VERSIONS_FILE.read_text().splitlines()
-
-
-def get_key(version):
-    if platform.system() == "Linux":
-        libc = sysconfig.get_config_var("SOABI").split("-")[-1]
-    else:
-        libc = "none"
-    key = f"{INTERPRETER}-{version}-{PLATFORM_MAP.get(PLATFORM, PLATFORM)}-{ARCH_MAP.get(ARCH, ARCH)}-{libc}"
-    return key
-
-
-def download(version):
-    key = get_key(version)
-    install_dir = INSTALL_DIR / f"{INTERPRETER}@{version}"
-    print(f"Downloading {key}")
-
-    url = versions_metadata[key]["url"]
-
-    if not url:
-        print(f"No matching download for {key}")
-        sys.exit(1)
-
-    filename = url.split("/")[-1]
-    print(f"Downloading {urllib.parse.unquote(filename)}")
-    download_path = THIS_DIR / filename
-    with urllib.request.urlopen(url) as response:
-        with download_path.open("wb") as download_file:
-            shutil.copyfileobj(response, download_file)
-
-    sha = versions_metadata[key]["sha256"]
-    if not sha:
-        print(f"WARNING: no checksum for {key}")
-    else:
-        print("Verifying checksum...", end="")
-        if sha256_file(download_path) != sha:
-            print(" FAILED!")
-            sys.exit(1)
-        print(" OK")
-
-    if install_dir.exists():
-        shutil.rmtree(install_dir)
-    print("Extracting to", install_dir)
-    install_dir.parent.mkdir(parents=True, exist_ok=True)
-
-    # n.b. do not use `.with_suffix` as it will replace the patch Python version
-    extract_dir = Path(str(install_dir) + ".tmp")
-
-    decompress_file(THIS_DIR / filename, extract_dir)
-    (extract_dir / "python").rename(install_dir)
-    (THIS_DIR / filename).unlink()
-    extract_dir.rmdir()
-
-    return install_dir
-
-
-def install(version, install_dir):
-    key = get_key(version)
-
-    if PLATFORM == "win32":
-        executable = install_dir / "install" / "python.exe"
-    else:
-        # Use relative paths for links so if the bin is moved they don't break
-        executable = (
-            "." / install_dir.relative_to(BIN_DIR) / "install" / "bin" / "python3"
-        )
-
-    major = versions_metadata[key]["major"]
-    minor = versions_metadata[key]["minor"]
-
-    # Link as all version tuples, later versions in the file will take precedence
-    BIN_DIR.mkdir(parents=True, exist_ok=True)
-
-    targets = [
-        (BIN_DIR / f"python{version}"),
-        (BIN_DIR / f"python{major}.{minor}"),
-        (BIN_DIR / f"python{major}"),
-        (BIN_DIR / "python"),
-    ]
-    for target in targets:
-        target.unlink(missing_ok=True)
-        if PLATFORM == "win32":
-            target.hardlink_to(executable)
-        else:
-            target.symlink_to(executable)
-
-    print(f"Installed executables for python{version}")
-
-
-if __name__ == "__main__":
-    if INSTALL_DIR.exists():
-        print("Removing existing installations...")
-        shutil.rmtree(INSTALL_DIR)
-
-    # Download in parallel
-    with concurrent.futures.ProcessPoolExecutor(max_workers=len(versions)) as executor:
-        futures = [
-            (version, executor.submit(download, version)) for version in versions
-        ]
-
-    # Install sequentially so overrides are respected
-    for version, future in futures:
-        install_dir = future.result()
-        install(version, install_dir)
-
-    print("Done!")
diff --git a/scripts/wheels/maturin-1.4.0-py3-none-any.whl b/scripts/links/maturin-1.4.0-py3-none-any.whl
similarity index 100%
rename from scripts/wheels/maturin-1.4.0-py3-none-any.whl
rename to scripts/links/maturin-1.4.0-py3-none-any.whl
diff --git a/scripts/wheels/maturin-2.0.0-py3-none-linux_x86_64.whl b/scripts/links/maturin-2.0.0-py3-none-linux_x86_64.whl
similarity index 100%
rename from scripts/wheels/maturin-2.0.0-py3-none-linux_x86_64.whl
rename to scripts/links/maturin-2.0.0-py3-none-linux_x86_64.whl
diff --git a/scripts/wheels/simple_launcher-0.1.0-py3-none-any.whl b/scripts/links/simple_launcher-0.1.0-py3-none-any.whl
similarity index 100%
rename from scripts/wheels/simple_launcher-0.1.0-py3-none-any.whl
rename to scripts/links/simple_launcher-0.1.0-py3-none-any.whl
diff --git a/scripts/wheels/tqdm-1000.0.0-py3-none-any.whl b/scripts/links/tqdm-1000.0.0-py3-none-any.whl
similarity index 100%
rename from scripts/wheels/tqdm-1000.0.0-py3-none-any.whl
rename to scripts/links/tqdm-1000.0.0-py3-none-any.whl
diff --git a/scripts/wheels/tqdm-4.66.1-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl b/scripts/links/tqdm-4.66.1-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl
similarity index 100%
rename from scripts/wheels/tqdm-4.66.1-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl
rename to scripts/links/tqdm-4.66.1-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl
diff --git a/scripts/links/tqdm-999.0.0.tar.gz b/scripts/links/tqdm-999.0.0.tar.gz
new file mode 100644
index 000000000..cbe4150bd
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diff --git a/scripts/links/validation-1.0.0-py3-none-any.whl b/scripts/links/validation-1.0.0-py3-none-any.whl
new file mode 100644
index 000000000..8808be42f
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diff --git a/scripts/links/validation-2.0.0-py3-none-any.whl b/scripts/links/validation-2.0.0-py3-none-any.whl
new file mode 100644
index 000000000..fa560c775
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diff --git a/scripts/links/validation-3.0.0-py3-none-any.whl b/scripts/links/validation-3.0.0-py3-none-any.whl
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index 000000000..52ba2e5fd
Binary files /dev/null and b/scripts/links/validation-3.0.0-py3-none-any.whl differ
diff --git a/scripts/packages/dependent_editables/second_editable/.gitignore b/scripts/packages/dependent_editables/second_editable/.gitignore
index eaa9f051b..c847724a5 100644
--- a/scripts/packages/dependent_editables/second_editable/.gitignore
+++ b/scripts/packages/dependent_editables/second_editable/.gitignore
@@ -1,2 +1,3 @@
 # Artifacts from the build process.
 *.egg-info/
+build/
diff --git a/scripts/requirements/all-kinds.in b/scripts/requirements/all-kinds.in
index 1fe196b8d..4b48f77a3 100644
--- a/scripts/requirements/all-kinds.in
+++ b/scripts/requirements/all-kinds.in
@@ -10,4 +10,3 @@ django_allauth==0.51.0
 werkzeug @ https://files.pythonhosted.org/packages/0d/cc/ff1904eb5eb4b455e442834dabf9427331ac0fa02853bf83db817a7dd53d/werkzeug-3.0.1.tar.gz
 # git source dist
 pydantic-extra-types @ git+https://github.com/pydantic/pydantic-extra-types.git
-
diff --git a/scripts/scenarios/generate.py b/scripts/scenarios/generate.py
index 37bd180e3..f5a60998e 100755
--- a/scripts/scenarios/generate.py
+++ b/scripts/scenarios/generate.py
@@ -65,7 +65,6 @@ except ImportError:
     )
     exit(1)
 
-
 try:
     import chevron_blue
 except ImportError:
@@ -133,6 +132,13 @@ def main(scenarios: list[Path], snapshot_update: bool = True):
             else []
         )
 
+    # Hack to track which scenarios require a specific Python patch version
+    for scenario in data["scenarios"]:
+        if "patch" in scenario["name"]:
+            scenario["python_patch"] = True
+        else:
+            scenario["python_patch"] = False
+
     # We don't yet support local versions that aren't expressed as direct dependencies.
     for scenario in data["scenarios"]:
         expected = scenario["expected"]
@@ -168,11 +174,11 @@ def main(scenarios: list[Path], snapshot_update: bool = True):
 
         # Add generated metadata
         data["generated_from"] = (
-            f"https://github.com/zanieb/packse/tree/{ref}/scenarios"
+            f"https://github.com/astral-sh/packse/tree/{ref}/scenarios"
         )
         data["generated_with"] = "./scripts/sync_scenarios.sh"
         data["vendor_links"] = (
-            f"https://raw.githubusercontent.com/zanieb/packse/{ref}/vendor/links.html"
+            f"https://raw.githubusercontent.com/astral-sh/packse/{ref}/vendor/links.html"
         )
 
         data["index_url"] = f"https://astral-sh.github.io/packse/{ref}/simple-html/"
diff --git a/scripts/scenarios/requirements.txt b/scripts/scenarios/requirements.txt
index c4dbcd759..1d7df3023 100644
--- a/scripts/scenarios/requirements.txt
+++ b/scripts/scenarios/requirements.txt
@@ -6,33 +6,37 @@ charset-normalizer==3.3.2
     # via requests
 chevron-blue==0.2.1
     # via packse
-docutils==0.20.1
+docutils==0.21.post1
     # via readme-renderer
-editables==0.5
-    # via hatchling
-hatchling==1.21.1
+hatchling==1.22.5
     # via packse
 idna==3.6
     # via requests
-importlib-metadata==7.0.2
+importlib-metadata==7.1.0
     # via twine
-jaraco-classes==3.3.1
+jaraco-classes==3.4.0
     # via keyring
-keyring==24.3.1
+jaraco-context==5.3.0
+    # via keyring
+jaraco-functools==4.0.0
+    # via keyring
+keyring==25.1.0
     # via twine
 markdown-it-py==3.0.0
     # via rich
 mdurl==0.1.2
     # via markdown-it-py
 more-itertools==10.2.0
-    # via jaraco-classes
+    # via
+    #   jaraco-classes
+    #   jaraco-functools
 msgspec==0.18.6
     # via packse
-nh3==0.2.15
+nh3==0.2.17
     # via readme-renderer
 packaging==24.0
     # via hatchling
-packse==0.3.12
+packse==0.3.14
 pathspec==0.12.1
     # via hatchling
 pkginfo==1.10.0
@@ -57,7 +61,7 @@ rich==13.7.1
     # via twine
 setuptools==69.2.0
     # via packse
-trove-classifiers==2024.3.3
+trove-classifiers==2024.4.10
     # via hatchling
 twine==4.0.2
     # via packse
diff --git a/scripts/scenarios/templates/compile.mustache b/scripts/scenarios/templates/compile.mustache
index 6a21783e1..7084da6be 100644
--- a/scripts/scenarios/templates/compile.mustache
+++ b/scripts/scenarios/templates/compile.mustache
@@ -3,7 +3,7 @@
 //! Generated with `{{generated_with}}`
 //! Scenarios from <{{generated_from}}>
 //!
-#![cfg(all(feature = "python", feature = "pypi"))]
+#![cfg(all(feature = "python", feature = "pypi", unix))]
 
 use std::env;
 use std::process::Command;
@@ -13,14 +13,14 @@ use assert_cmd::assert::OutputAssertExt;
 use assert_fs::fixture::{FileWriteStr, PathChild};
 use predicates::prelude::predicate;
 
-use common::{create_bin_with_executables, get_bin, uv_snapshot, TestContext};
+use common::{python_path_with_versions, get_bin, uv_snapshot, TestContext};
 
 mod common;
 
 /// Provision python binaries and return a `pip compile` command with options shared across all scenarios.
 fn command(context: &TestContext, python_versions: &[&str]) -> Command {
-    let bin = create_bin_with_executables(&context.temp_dir, python_versions)
-        .expect("Failed to create bin dir");
+    let python_path = python_path_with_versions(&context.temp_dir, python_versions)
+        .expect("Failed to create Python test path");
     let mut command = Command::new(get_bin());
     command
         .arg("pip")
@@ -34,7 +34,7 @@ fn command(context: &TestContext, python_versions: &[&str]) -> Command {
         .arg(context.cache_dir.path())
         .env("VIRTUAL_ENV", context.venv.as_os_str())
         .env("UV_NO_WRAP", "1")
-        .env("UV_TEST_PYTHON_PATH", bin)
+        .env("UV_TEST_PYTHON_PATH", python_path)
         .current_dir(&context.temp_dir);
 
     if cfg!(all(windows, debug_assertions)) {
@@ -58,6 +58,9 @@ fn command(context: &TestContext, python_versions: &[&str]) -> Command {
 /// {{.}}
 {{/tree}}
 /// ```
+{{#python_patch}}
+#[cfg(feature = "python-patch")]
+{{/python_patch}}
 #[test]
 fn {{module_name}}() -> Result<()> {
     let context = TestContext::new("{{environment.python}}");
diff --git a/scripts/scenarios/templates/install.mustache b/scripts/scenarios/templates/install.mustache
index 06517014f..51e309ea0 100644
--- a/scripts/scenarios/templates/install.mustache
+++ b/scripts/scenarios/templates/install.mustache
@@ -3,7 +3,7 @@
 //! Generated with `{{generated_with}}`
 //! Scenarios from <{{generated_from}}>
 //!
-#![cfg(all(feature = "python", feature = "pypi"))]
+#![cfg(all(feature = "python", feature = "pypi", unix))]
 
 use std::path::Path;
 use std::process::Command;
@@ -77,6 +77,9 @@ fn command(context: &TestContext) -> Command {
 /// {{.}}
 {{/tree}}
 /// ```
+{{#python_patch}}
+#[cfg(feature = "python-patch")]
+{{/python_patch}}
 #[test]
 fn {{module_name}}() {
     let context = TestContext::new("{{environment.python}}");