diff --git a/pkgs/development/python-modules/google-cloud-datacatalog/default.nix b/pkgs/development/python-modules/google-cloud-datacatalog/default.nix
index 61b82bd14d3d..953254199a85 100644
--- a/pkgs/development/python-modules/google-cloud-datacatalog/default.nix
+++ b/pkgs/development/python-modules/google-cloud-datacatalog/default.nix
@@ -14,7 +14,7 @@
   setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "google-cloud-datacatalog";
   version = "3.29.0";
   pyproject = true;
@@ -22,11 +22,11 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "googleapis";
     repo = "google-cloud-python";
-    tag = "google-cloud-datacatalog-v${version}";
+    tag = "google-cloud-datacatalog-v${finalAttrs.version}";
     hash = "sha256-dVgcnnInqjUjySL7wjxGzI33t1YZJ8e9mSsmjAJ+fBI=";
   };
 
-  sourceRoot = "${src.name}/packages/google-cloud-datacatalog";
+  sourceRoot = "${finalAttrs.src.name}/packages/google-cloud-datacatalog";
 
   build-system = [ setuptools ];
 
@@ -65,8 +65,8 @@ buildPythonPackage rec {
   meta = {
     description = "Google Cloud Data Catalog API API client library";
     homepage = "https://github.com/googleapis/google-cloud-python/tree/main/packages/google-cloud-datacatalog";
-    changelog = "https://github.com/googleapis/google-cloud-python/blob/google-cloud-datacatalog-${src.tag}/packages/google-cloud-datacatalog/CHANGELOG.md";
+    changelog = "https://github.com/googleapis/google-cloud-python/blob/google-cloud-datacatalog-${finalAttrs.src.tag}/packages/google-cloud-datacatalog/CHANGELOG.md";
     license = lib.licenses.asl20;
     maintainers = [ lib.maintainers.sarahec ];
   };
-}
+})