diff --git a/python/uv/private/BUILD.bazel b/python/uv/private/BUILD.bazel
index 3e4d6c7baa..7684675116 100644
--- a/python/uv/private/BUILD.bazel
+++ b/python/uv/private/BUILD.bazel
@@ -65,6 +65,7 @@ bzl_library(
         ":uv_toolchains_repo_bzl",
         "//python/private:auth_bzl",
         "//python/private:common_labels_bzl",
+        "@bazel_features//:features",
     ],
 )
 
diff --git a/python/uv/private/uv.bzl b/python/uv/private/uv.bzl
index fe0911e3ea..3672a486a0 100644
--- a/python/uv/private/uv.bzl
+++ b/python/uv/private/uv.bzl
@@ -18,6 +18,7 @@ EXPERIMENTAL: This is experimental and may be removed without notice
 A module extension for working with uv.
 """
 
+load("@bazel_features//:features.bzl", "bazel_features")
 load("//python/private:auth.bzl", "AUTH_ATTRS", "get_auth")
 load("//python/private:common_labels.bzl", "labels")
 load(":toolchain_types.bzl", "UV_TOOLCHAIN_TYPE")
@@ -373,6 +374,11 @@ def _uv_toolchain_extension(module_ctx):
         hub_name = "uv",
     )
 
+    if bazel_features.external_deps.extension_metadata_has_reproducible:
+        return module_ctx.extension_metadata(reproducible = True)
+    else:
+        return None
+
 def _overlap(first_collection, second_collection):
     for x in first_collection:
         if x in second_collection: