Also mark python extension as reproducible

python/extensions/BUILD.bazel

@@ -37,6 +37,7 @@ bzl_library(
     visibility = ["//:__subpackages__"],
     deps = [
         "//python/private:util_bzl",
+        "//python/private/bzlmod:bazel_features_bzl",
         "//python/private/bzlmod:python_bzl",
     ],
 )

python/private/bzlmod/BUILD.bazel

@@ -45,7 +45,7 @@ bzl_library(
 
 bzl_library(
     name = "bazel_features_bzl",
-    srcs = ["@bazel_features//:bzl_files"],
+    deps = ["@bazel_features//:features"],
 )
 
 bzl_library(

python/private/bzlmod/python.bzl

@@ -14,6 +14,7 @@
 
 "Python toolchain module extensions for use with bzlmod"
 
+load("@bazel_features//:features.bzl", "bazel_features")
 load("//python:repositories.bzl", "python_register_toolchains")
 load("//python/private:toolchains_repo.bzl", "multi_toolchain_aliases")
 load("//python/private:util.bzl", "IS_BAZEL_6_4_OR_HIGHER")
@@ -230,6 +231,11 @@ def _python_impl(module_ctx):
             debug_info = json.encode_indent(debug_info),
         )
 
+    if bazel_features.external_deps.extension_metadata_has_reproducible:
+        return module_ctx.extension_metadata(reproducible = True)
+    else:
+        return None
+
 def _fail_duplicate_module_toolchain_version(version, module):
     fail(("Duplicate module toolchain version: module '{module}' attempted " +
           "to use version '{version}' multiple times in itself").format(