diff --git a/pkgs/development/python-modules/google-cloud-spanner/default.nix b/pkgs/development/python-modules/google-cloud-spanner/default.nix
index 759a8f25c1a..c4849dd2f55 100644
--- a/pkgs/development/python-modules/google-cloud-spanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-spanner/default.nix
@@ -21,11 +21,6 @@ buildPythonPackage rec {
     sha256 = "060c53bc6f541660a2fe868fd83a695207d4e7b050e04fe103d1e77634b813c7";
   };
 
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace '"proto-plus == 1.11.0"' '"proto-plus"'
-  '';
-
   propagatedBuildInputs = [ google-cloud-core grpc_google_iam_v1 libcst proto-plus sqlparse ];
 
   checkInputs = [ google-cloud-testutils mock pytestCheckHook pytest-asyncio ];