diff --git a/pkgs/tools/admin/google-cloud-sdk/default.nix b/pkgs/tools/admin/google-cloud-sdk/default.nix
index 7c81e861ddb..5b701600dd1 100644
--- a/pkgs/tools/admin/google-cloud-sdk/default.nix
+++ b/pkgs/tools/admin/google-cloud-sdk/default.nix
@@ -13,7 +13,7 @@
 let
   pythonInputs = [ cffi cryptography pyopenssl crcmod ]
                  ++ lib.optional (with-gce) google-compute-engine;
-  pythonPath = lib.makeSearchPath python.sitePackages pythonInputs;
+  pythonEnv = python.withPackages (_: pythonInputs);
 
   baseUrl = "https://dl.google.com/dl/cloudsdk/channels/rapid/downloads";
   sources = name: system: {
@@ -53,8 +53,8 @@ in stdenv.mkDerivation rec {
         programPath="$out/google-cloud-sdk/bin/$program"
         binaryPath="$out/bin/$program"
         wrapProgram "$programPath" \
-            --set CLOUDSDK_PYTHON "${python}/bin/python" \
-            --prefix PYTHONPATH : "${pythonPath}"
+            --set CLOUDSDK_PYTHON "${pythonEnv}/bin/python" \
+            --prefix PYTHONPATH : "${pythonEnv}/${python.sitePackages}"
 
         mkdir -p $out/bin
         ln -s $programPath $binaryPath