diff --git a/crates/uv-distribution/src/distribution_database.rs b/crates/uv-distribution/src/distribution_database.rs
index 3c3ef575f..fc25b387f 100644
--- a/crates/uv-distribution/src/distribution_database.rs
+++ b/crates/uv-distribution/src/distribution_database.rs
@@ -2,7 +2,6 @@ use std::future::Future;
 use std::io;
 use std::path::Path;
 use std::pin::Pin;
-use std::rc::Rc;
 use std::sync::Arc;
 use std::task::{Context, Poll};
 
@@ -31,7 +30,6 @@ use uv_pypi_types::HashDigest;
 use uv_types::{BuildContext, BuildStack};
 
 use crate::archive::Archive;
-use crate::locks::Locks;
 use crate::metadata::{ArchiveMetadata, Metadata};
 use crate::source::SourceDistributionBuilder;
 use crate::{Error, LocalWheel, Reporter, RequiresDist};
@@ -51,7 +49,6 @@ use crate::{Error, LocalWheel, Reporter, RequiresDist};
 pub struct DistributionDatabase<'a, Context: BuildContext> {
     build_context: &'a Context,
     builder: SourceDistributionBuilder<'a, Context>,
-    locks: Rc<Locks>,
     client: ManagedClient<'a>,
     reporter: Option<Arc<dyn Reporter>>,
 }
@@ -65,7 +62,6 @@ impl<'a, Context: BuildContext> DistributionDatabase<'a, Context> {
         Self {
             build_context,
             builder: SourceDistributionBuilder::new(build_context),
-            locks: Rc::new(Locks::default()),
             client: ManagedClient::new(client, concurrent_downloads),
             reporter: None,
         }
@@ -347,9 +343,6 @@ impl<'a, Context: BuildContext> DistributionDatabase<'a, Context> {
         tags: &Tags,
         hashes: HashPolicy<'_>,
     ) -> Result<LocalWheel, Error> {
-        let lock = self.locks.acquire(dist).await;
-        let _guard = lock.lock().await;
-
         let built_wheel = self
             .builder
             .download_and_build(&BuildableSource::Dist(dist), tags, hashes, &self.client)
@@ -496,9 +489,6 @@ impl<'a, Context: BuildContext> DistributionDatabase<'a, Context> {
             }
         }
 
-        let lock = self.locks.acquire(source).await;
-        let _guard = lock.lock().await;
-
         let metadata = self
             .builder
             .download_and_build_metadata(source, hashes, &self.client)
diff --git a/crates/uv-distribution/src/lib.rs b/crates/uv-distribution/src/lib.rs
index a91ed6ccf..d7679a5fb 100644
--- a/crates/uv-distribution/src/lib.rs
+++ b/crates/uv-distribution/src/lib.rs
@@ -14,7 +14,6 @@ mod distribution_database;
 mod download;
 mod error;
 mod index;
-mod locks;
 mod metadata;
 mod reporter;
 mod source;
diff --git a/crates/uv-distribution/src/locks.rs b/crates/uv-distribution/src/locks.rs
deleted file mode 100644
index 934b97dba..000000000
--- a/crates/uv-distribution/src/locks.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-use std::rc::Rc;
-
-use rustc_hash::FxHashMap;
-use tokio::sync::Mutex;
-
-use uv_distribution_types::{Identifier, ResourceId};
-
-/// A set of locks used to prevent concurrent access to the same resource.
-#[derive(Debug, Default)]
-pub(crate) struct Locks(Mutex<FxHashMap<ResourceId, Rc<Mutex<()>>>>);
-
-impl Locks {
-    /// Acquire a lock on the given resource.
-    pub(crate) async fn acquire(&self, dist: &impl Identifier) -> Rc<Mutex<()>> {
-        let mut map = self.0.lock().await;
-        map.entry(dist.resource_id())
-            .or_insert_with(|| Rc::new(Mutex::new(())))
-            .clone()
-    }
-}
diff --git a/crates/uv-requirements/src/source_tree.rs b/crates/uv-requirements/src/source_tree.rs
index 94aba87d7..4bdeb86ba 100644
--- a/crates/uv-requirements/src/source_tree.rs
+++ b/crates/uv-requirements/src/source_tree.rs
@@ -195,6 +195,8 @@ impl<'a, Context: BuildContext> SourceTreeResolver<'a, Context> {
         };
 
         // Fetch the metadata for the distribution.
+        //
+        // TODO(charlie): Respect in-flight fetches.
         let metadata = {
             let id = VersionId::from_url(source.url());
             if let Some(archive) =