diff --git a/pkgs/development/python-modules/google_cloud_spanner/default.nix b/pkgs/development/python-modules/google_cloud_spanner/default.nix
index 80e88d53f1f..f6c54be1279 100644
--- a/pkgs/development/python-modules/google_cloud_spanner/default.nix
+++ b/pkgs/development/python-modules/google_cloud_spanner/default.nix
@@ -11,23 +11,25 @@
 
 buildPythonPackage rec {
   pname = "google-cloud-spanner";
-  version = "1.13.0";
+  version = "1.15.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "eafa09cc344339a23702ee74eac5713974fefafdfd56afb589bd25548c79c80d";
+    sha256 = "1ra1cim9kcs680yrhvfn5hjx8y1sccp3lw7id5j5pj53sshdng8h";
   };
 
   checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ grpcio-gcp grpc_google_iam_v1 google_api_core google_cloud_core ];
 
+  # avoid importing local package
   checkPhase = ''
+    rm -r google
     pytest tests/unit
   '';
 
   meta = with stdenv.lib; {
     description = "Cloud Spanner API client library";
-    homepage = https://github.com/GoogleCloudPlatform/google-cloud-python;
+    homepage = "https://github.com/GoogleCloudPlatform/google-cloud-python";
     license = licenses.asl20;
     maintainers = [ maintainers.costrouc ];
   };