diff --git a/pkgs/development/python-modules/google-cloud-iam/default.nix b/pkgs/development/python-modules/google-cloud-iam/default.nix
index a9f77a1c8582..a519eee42309 100644
--- a/pkgs/development/python-modules/google-cloud-iam/default.nix
+++ b/pkgs/development/python-modules/google-cloud-iam/default.nix
@@ -57,8 +57,12 @@ buildPythonPackage rec {
     "google.cloud.iam_credentials_v1"
   ];
 
-  passthru.updateScript = gitUpdater {
-    rev-prefix = "google-cloud-iam-v";
+  passthru = {
+    # bulk updater selects wrong tag
+    skipBulkUpdate = true;
+    updateScript = gitUpdater {
+      rev-prefix = "google-cloud-iam-v";
+    };
   };
 
   meta = {