diff --git a/crates/uv-cli/src/lib.rs b/crates/uv-cli/src/lib.rs
index f4850ac21..bb8179001 100644
--- a/crates/uv-cli/src/lib.rs
+++ b/crates/uv-cli/src/lib.rs
@@ -5265,7 +5265,12 @@ pub struct ToolUpgradeArgs {
     /// Ignore the `tool.uv.sources` table when resolving dependencies. Used to lock against the
     /// standards-compliant, publishable package metadata, as opposed to using any workspace, Git,
     /// URL, or local path sources.
-    #[arg(long, help_heading = "Resolver options")]
+    #[arg(
+        long,
+        env = EnvVars::UV_NO_SOURCES,
+        value_parser = clap::builder::BoolishValueParser::new(),
+        help_heading = "Resolver options",
+    )]
     pub no_sources: bool,
 
     #[command(flatten)]
@@ -6183,7 +6188,12 @@ pub struct InstallerArgs {
     /// Ignore the `tool.uv.sources` table when resolving dependencies. Used to lock against the
     /// standards-compliant, publishable package metadata, as opposed to using any workspace, Git,
     /// URL, or local path sources.
-    #[arg(long, help_heading = "Resolver options")]
+    #[arg(
+        long,
+        env = EnvVars::UV_NO_SOURCES,
+        value_parser = clap::builder::BoolishValueParser::new(),
+        help_heading = "Resolver options"
+    )]
     pub no_sources: bool,
 }
 
@@ -6371,7 +6381,12 @@ pub struct ResolverArgs {
     /// Ignore the `tool.uv.sources` table when resolving dependencies. Used to lock against the
     /// standards-compliant, publishable package metadata, as opposed to using any workspace, Git,
     /// URL, or local path sources.
-    #[arg(long, help_heading = "Resolver options")]
+    #[arg(
+        long,
+        env = EnvVars::UV_NO_SOURCES,
+        value_parser = clap::builder::BoolishValueParser::new(),
+        help_heading = "Resolver options",
+    )]
     pub no_sources: bool,
 }
 
@@ -6609,7 +6624,12 @@ pub struct ResolverInstallerArgs {
     /// Ignore the `tool.uv.sources` table when resolving dependencies. Used to lock against the
     /// standards-compliant, publishable package metadata, as opposed to using any workspace, Git,
     /// URL, or local path sources.
-    #[arg(long, help_heading = "Resolver options")]
+    #[arg(
+        long,
+        env = EnvVars::UV_NO_SOURCES,
+        value_parser = clap::builder::BoolishValueParser::new(),
+        help_heading = "Resolver options",
+    )]
     pub no_sources: bool,
 }
 
diff --git a/crates/uv-static/src/env_vars.rs b/crates/uv-static/src/env_vars.rs
index 60a6079ee..c0ddd6f20 100644
--- a/crates/uv-static/src/env_vars.rs
+++ b/crates/uv-static/src/env_vars.rs
@@ -50,6 +50,11 @@ impl EnvVars {
     #[attr_added_in("0.4.19")]
     pub const UV_FIND_LINKS: &'static str = "UV_FIND_LINKS";
 
+    /// Equivalent to the `--no-sources` command-line argument. If set, uv will ignore
+    /// `[tool.uv.sources]` annotations when resolving dependencies.
+    #[attr_added_in("0.9.8")]
+    pub const UV_NO_SOURCES: &'static str = "UV_NO_SOURCES";
+
     /// Equivalent to the `--cache-dir` command-line argument. If set, uv will use this
     /// directory for caching instead of the default cache directory.
     #[attr_added_in("0.0.5")]
diff --git a/crates/uv/tests/it/pip_install.rs b/crates/uv/tests/it/pip_install.rs
index 2440f9acf..3048f32fe 100644
--- a/crates/uv/tests/it/pip_install.rs
+++ b/crates/uv/tests/it/pip_install.rs
@@ -10528,10 +10528,12 @@ fn directory_and_group() -> Result<()> {
     Ok(())
 }
 
-/// Regression test that we don't discover workspaces with `--no-sources`.
+/// Regression test that we don't discover workspaces with `--no-sources` or the `UV_NO_SOURCES`
+/// environment variable.
 ///
 /// We have a workspace dependency shadowing a PyPI package and using this package's version to
-/// check that by default we respect workspace package, but with `--no-sources`, we ignore them.
+/// check that by default we respect workspace package, but with `--no-sources` or `UV_NO_SOURCES=true`,
+/// we ignore them.
 #[test]
 fn no_sources_workspace_discovery() -> Result<()> {
     let context = TestContext::new("3.12");
@@ -10633,6 +10635,67 @@ fn no_sources_workspace_discovery() -> Result<()> {
     "###
     );
 
+    // Test with UV_NO_SOURCES=true environment variable (should behave same as flag)
+    uv_snapshot!(context.filters(), context.pip_install()
+    .arg("--upgrade")
+    .arg(".")
+    .env("UV_NO_SOURCES", "true"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 4 packages in [TIME]
+    Prepared 2 packages in [TIME]
+    Uninstalled 2 packages in [TIME]
+    Installed 2 packages in [TIME]
+     - anyio==2.0.0 (from file://[TEMP_DIR]/anyio)
+     + anyio==4.3.0
+     ~ foo==1.0.0 (from file://[TEMP_DIR]/)
+    "###
+    );
+
+    // Test UV_NO_SOURCES=false doesn't activate no-sources
+    uv_snapshot!(context.filters(), context.pip_install()
+        .arg("--upgrade")
+        .arg(".")
+        .env("UV_NO_SOURCES", "false"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 2 packages in [TIME]
+    Prepared 2 packages in [TIME]
+    Uninstalled 2 packages in [TIME]
+    Installed 2 packages in [TIME]
+     - anyio==4.3.0
+     + anyio==2.0.0 (from file://[TEMP_DIR]/anyio)
+     ~ foo==1.0.0 (from file://[TEMP_DIR]/)
+    "###
+    );
+
+    // Test that CLI flag overrides env var
+    uv_snapshot!(context.filters(), context.pip_install()
+        .arg("--upgrade")
+        .arg("--no-sources")
+        .arg(".")
+        .env("UV_NO_SOURCES", "False"), @r"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 4 packages in [TIME]
+    Prepared 2 packages in [TIME]
+    Uninstalled 2 packages in [TIME]
+    Installed 2 packages in [TIME]
+     - anyio==2.0.0 (from file://[TEMP_DIR]/anyio)
+     + anyio==4.3.0
+     ~ foo==1.0.0 (from file://[TEMP_DIR]/)
+    "
+    );
+
     Ok(())
 }
 
diff --git a/docs/reference/cli.md b/docs/reference/cli.md
index 4f1f447ce..1c0f55461 100644
--- a/docs/reference/cli.md
+++ b/docs/reference/cli.md
@@ -505,7 +505,7 @@ uv run [OPTIONS] [COMMAND]
 <p>If a virtual environment is active or found in a current or parent directory, it will be used as if there was no project or workspace.</p>
 </dd><dt id="uv-run--no-python-downloads"><a href="#uv-run--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-run--no-sources"><a href="#uv-run--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-run--no-sync"><a href="#uv-run--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-run--no-sync"><a href="#uv-run--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment.</p>
 <p>Implies <code>--frozen</code>, as the project dependencies will be ignored (i.e., the lockfile will not be updated, since the environment will not be synced regardless).</p>
 <p>May also be set with the <code>UV_NO_SYNC</code> environment variable.</p></dd><dt id="uv-run--offline"><a href="#uv-run--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
@@ -908,7 +908,7 @@ uv add [OPTIONS] <PACKAGES|--requirements <REQUIREMENTS>>
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-add--no-python-downloads"><a href="#uv-add--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-add--no-sources"><a href="#uv-add--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-add--no-sync"><a href="#uv-add--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-add--no-sync"><a href="#uv-add--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment</p>
 <p>May also be set with the <code>UV_NO_SYNC</code> environment variable.</p></dd><dt id="uv-add--no-workspace"><a href="#uv-add--no-workspace"><code>--no-workspace</code></a></dt><dd><p>Don't add the dependency as a workspace member.</p>
 <p>By default, when adding a dependency that's a local path and is within the workspace directory, uv will add it as a workspace member; pass <code>--no-workspace</code> to add the package as direct path dependency instead.</p>
 </dd><dt id="uv-add--offline"><a href="#uv-add--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
@@ -1102,7 +1102,7 @@ uv remove [OPTIONS] <PACKAGES>...
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-remove--no-python-downloads"><a href="#uv-remove--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-remove--no-sources"><a href="#uv-remove--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-remove--no-sync"><a href="#uv-remove--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment after re-locking the project</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-remove--no-sync"><a href="#uv-remove--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment after re-locking the project</p>
 <p>May also be set with the <code>UV_NO_SYNC</code> environment variable.</p></dd><dt id="uv-remove--offline"><a href="#uv-remove--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-remove--optional"><a href="#uv-remove--optional"><code>--optional</code></a> <i>optional</i></dt><dd><p>Remove the packages from the project's optional dependencies for the specified extra</p>
@@ -1284,7 +1284,7 @@ uv version [OPTIONS] [VALUE]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-version--no-python-downloads"><a href="#uv-version--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-version--no-sources"><a href="#uv-version--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-version--no-sync"><a href="#uv-version--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment after re-locking the project</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-version--no-sync"><a href="#uv-version--no-sync"><code>--no-sync</code></a></dt><dd><p>Avoid syncing the virtual environment after re-locking the project</p>
 <p>May also be set with the <code>UV_NO_SYNC</code> environment variable.</p></dd><dt id="uv-version--offline"><a href="#uv-version--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-version--output-format"><a href="#uv-version--output-format"><code>--output-format</code></a> <i>output-format</i></dt><dd><p>The format of the output</p>
@@ -1500,7 +1500,7 @@ uv sync [OPTIONS]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-sync--no-python-downloads"><a href="#uv-sync--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-sync--no-sources"><a href="#uv-sync--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-sync--offline"><a href="#uv-sync--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-sync--offline"><a href="#uv-sync--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-sync--only-dev"><a href="#uv-sync--only-dev"><code>--only-dev</code></a></dt><dd><p>Only include the development dependency group.</p>
 <p>The project and its dependencies will be omitted.</p>
@@ -1733,7 +1733,7 @@ uv lock [OPTIONS]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-lock--no-python-downloads"><a href="#uv-lock--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-lock--no-sources"><a href="#uv-lock--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-lock--offline"><a href="#uv-lock--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-lock--offline"><a href="#uv-lock--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-lock--prerelease"><a href="#uv-lock--prerelease"><code>--prerelease</code></a> <i>prerelease</i></dt><dd><p>The strategy to use when considering pre-release versions.</p>
 <p>By default, uv will accept pre-releases for packages that <em>only</em> publish pre-releases, along with first-party requirements that contain an explicit pre-release marker in the declared specifiers (<code>if-necessary-or-explicit</code>).</p>
@@ -1935,7 +1935,7 @@ uv export [OPTIONS]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-export--no-python-downloads"><a href="#uv-export--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-export--no-sources"><a href="#uv-export--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-export--offline"><a href="#uv-export--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-export--offline"><a href="#uv-export--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-export--only-dev"><a href="#uv-export--only-dev"><code>--only-dev</code></a></dt><dd><p>Only include the development dependency group.</p>
 <p>The project and its dependencies will be omitted.</p>
@@ -2116,7 +2116,7 @@ uv tree [OPTIONS]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-tree--no-python-downloads"><a href="#uv-tree--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-tree--no-sources"><a href="#uv-tree--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-tree--offline"><a href="#uv-tree--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-tree--offline"><a href="#uv-tree--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-tree--only-dev"><a href="#uv-tree--only-dev"><code>--only-dev</code></a></dt><dd><p>Only include the development dependency group.</p>
 <p>The project and its dependencies will be omitted.</p>
@@ -2456,7 +2456,7 @@ uv tool run [OPTIONS] [COMMAND]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-tool-run--no-python-downloads"><a href="#uv-tool-run--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-tool-run--no-sources"><a href="#uv-tool-run--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-tool-run--offline"><a href="#uv-tool-run--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-tool-run--offline"><a href="#uv-tool-run--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-tool-run--overrides"><a href="#uv-tool-run--overrides"><code>--overrides</code></a>, <code>--override</code> <i>overrides</i></dt><dd><p>Override versions using the given requirements files.</p>
 <p>Overrides files are <code>requirements.txt</code>-like files that force a specific version of a requirement to be installed, regardless of the requirements declared by any constituent package, and regardless of whether this would be considered an invalid resolution.</p>
@@ -2686,7 +2686,7 @@ uv tool install [OPTIONS] <PACKAGE>
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-tool-install--no-python-downloads"><a href="#uv-tool-install--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-tool-install--no-sources"><a href="#uv-tool-install--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-tool-install--offline"><a href="#uv-tool-install--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-tool-install--offline"><a href="#uv-tool-install--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-tool-install--overrides"><a href="#uv-tool-install--overrides"><code>--overrides</code></a>, <code>--override</code> <i>overrides</i></dt><dd><p>Override versions using the given requirements files.</p>
 <p>Overrides files are <code>requirements.txt</code>-like files that force a specific version of a requirement to be installed, regardless of the requirements declared by any constituent package, and regardless of whether this would be considered an invalid resolution.</p>
@@ -2907,7 +2907,7 @@ uv tool upgrade [OPTIONS] <NAME>...
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-tool-upgrade--no-python-downloads"><a href="#uv-tool-upgrade--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-tool-upgrade--no-sources"><a href="#uv-tool-upgrade--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-tool-upgrade--offline"><a href="#uv-tool-upgrade--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-tool-upgrade--offline"><a href="#uv-tool-upgrade--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
 <p>May also be set with the <code>UV_OFFLINE</code> environment variable.</p></dd><dt id="uv-tool-upgrade--prerelease"><a href="#uv-tool-upgrade--prerelease"><code>--prerelease</code></a> <i>prerelease</i></dt><dd><p>The strategy to use when considering pre-release versions.</p>
 <p>By default, uv will accept pre-releases for packages that <em>only</em> publish pre-releases, along with first-party requirements that contain an explicit pre-release marker in the declared specifiers (<code>if-necessary-or-explicit</code>).</p>
@@ -4143,7 +4143,7 @@ uv pip compile [OPTIONS] <SRC_FILE|--group <GROUP>>
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-pip-compile--no-python-downloads"><a href="#uv-pip-compile--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-pip-compile--no-sources"><a href="#uv-pip-compile--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-pip-compile--no-strip-extras"><a href="#uv-pip-compile--no-strip-extras"><code>--no-strip-extras</code></a></dt><dd><p>Include extras in the output file.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-pip-compile--no-strip-extras"><a href="#uv-pip-compile--no-strip-extras"><code>--no-strip-extras</code></a></dt><dd><p>Include extras in the output file.</p>
 <p>By default, uv strips extras, as any packages pulled in by the extras are already included as dependencies in the output file directly. Further, output files generated with <code>--no-strip-extras</code> cannot be used as constraints files in <code>install</code> and <code>sync</code> invocations.</p>
 </dd><dt id="uv-pip-compile--no-strip-markers"><a href="#uv-pip-compile--no-strip-markers"><code>--no-strip-markers</code></a></dt><dd><p>Include environment markers in the output file.</p>
 <p>By default, uv strips environment markers, as the resolution generated by <code>compile</code> is only guaranteed to be correct for the target environment.</p>
@@ -4440,7 +4440,7 @@ uv pip sync [OPTIONS] <SRC_FILE>...
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-pip-sync--no-python-downloads"><a href="#uv-pip-sync--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-pip-sync--no-sources"><a href="#uv-pip-sync--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-pip-sync--no-verify-hashes"><a href="#uv-pip-sync--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-pip-sync--no-verify-hashes"><a href="#uv-pip-sync--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
 <p>By default, uv will verify any available hashes in the requirements file, but will not require that all requirements have an associated hash. To enforce hash validation, use <code>--require-hashes</code>.</p>
 <p>May also be set with the <code>UV_NO_VERIFY_HASHES</code> environment variable.</p></dd><dt id="uv-pip-sync--offline"><a href="#uv-pip-sync--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
@@ -4728,7 +4728,7 @@ uv pip install [OPTIONS] <PACKAGE|--requirements <REQUIREMENTS>|--editable <EDIT
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-pip-install--no-python-downloads"><a href="#uv-pip-install--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-pip-install--no-sources"><a href="#uv-pip-install--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-pip-install--no-verify-hashes"><a href="#uv-pip-install--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-pip-install--no-verify-hashes"><a href="#uv-pip-install--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
 <p>By default, uv will verify any available hashes in the requirements file, but will not require that all requirements have an associated hash. To enforce hash validation, use <code>--require-hashes</code>.</p>
 <p>May also be set with the <code>UV_NO_VERIFY_HASHES</code> environment variable.</p></dd><dt id="uv-pip-install--offline"><a href="#uv-pip-install--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
@@ -5745,7 +5745,7 @@ uv build [OPTIONS] [SRC]
 <p>For example, spinners or progress bars.</p>
 <p>May also be set with the <code>UV_NO_PROGRESS</code> environment variable.</p></dd><dt id="uv-build--no-python-downloads"><a href="#uv-build--no-python-downloads"><code>--no-python-downloads</code></a></dt><dd><p>Disable automatic downloads of Python.</p>
 </dd><dt id="uv-build--no-sources"><a href="#uv-build--no-sources"><code>--no-sources</code></a></dt><dd><p>Ignore the <code>tool.uv.sources</code> table when resolving dependencies. Used to lock against the standards-compliant, publishable package metadata, as opposed to using any workspace, Git, URL, or local path sources</p>
-</dd><dt id="uv-build--no-verify-hashes"><a href="#uv-build--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
+<p>May also be set with the <code>UV_NO_SOURCES</code> environment variable.</p></dd><dt id="uv-build--no-verify-hashes"><a href="#uv-build--no-verify-hashes"><code>--no-verify-hashes</code></a></dt><dd><p>Disable validation of hashes in the requirements file.</p>
 <p>By default, uv will verify any available hashes in the requirements file, but will not require that all requirements have an associated hash. To enforce hash validation, use <code>--require-hashes</code>.</p>
 <p>May also be set with the <code>UV_NO_VERIFY_HASHES</code> environment variable.</p></dd><dt id="uv-build--offline"><a href="#uv-build--offline"><code>--offline</code></a></dt><dd><p>Disable network access.</p>
 <p>When disabled, uv will only use locally cached data and locally available files.</p>
diff --git a/docs/reference/environment.md b/docs/reference/environment.md
index a0ff012c8..5c0711549 100644
--- a/docs/reference/environment.md
+++ b/docs/reference/environment.md
@@ -386,6 +386,12 @@ alias, for backwards compatibility.
 Equivalent to the `--no-progress` command-line argument. Disables all progress output. For
 example, spinners and progress bars.
 
+### `UV_NO_SOURCES`
+<small class="added-in">added in `0.9.8`</small>
+
+Equivalent to the `--no-sources` command-line argument. If set, uv will ignore
+`[tool.uv.sources]` annotations when resolving dependencies.
+
 ### `UV_NO_SYNC`
 <small class="added-in">added in `0.4.18`</small>