diff --git a/crates/uv-resolver/src/flat_index.rs b/crates/uv-resolver/src/flat_index.rs
index 44bf28ce6e82..8c47f4322d9e 100644
--- a/crates/uv-resolver/src/flat_index.rs
+++ b/crates/uv-resolver/src/flat_index.rs
@@ -226,3 +226,10 @@ impl From<FlatDistributions> for BTreeMap<Version, PrioritizedDist> {
         distributions.0
     }
 }
+
+/// For external users.
+impl From<BTreeMap<Version, PrioritizedDist>> for FlatDistributions {
+    fn from(distributions: BTreeMap<Version, PrioritizedDist>) -> Self {
+        Self(distributions)
+    }
+}