diff --git a/pkgs/development/python-modules/cirq-google/default.nix b/pkgs/development/python-modules/cirq-google/default.nix
index 4f185c825c34..c2d36a4f796d 100644
--- a/pkgs/development/python-modules/cirq-google/default.nix
+++ b/pkgs/development/python-modules/cirq-google/default.nix
@@ -1,27 +1,23 @@
 { buildPythonPackage
 , cirq-core
+, freezegun
 , google-api-core
 , protobuf
 , pytestCheckHook
-, freezegun
 , pythonRelaxDepsHook
+, setuptools
 }:
 
 buildPythonPackage rec {
   pname = "cirq-google";
-  format = "setuptools";
+  pyproject = true;
   inherit (cirq-core) version src meta;
 
   sourceRoot = "${src.name}/${pname}";
 
-  postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "google-api-core[grpc] >= 1.14.0, < 2.0.0dev" "google-api-core[grpc] >= 1.14.0, < 3.0.0dev" \
-      --replace "protobuf >= 3.15.0, < 4" "protobuf >= 3.15.0"
-  '';
-
   nativeBuildInputs = [
     pythonRelaxDepsHook
+    setuptools
   ];
 
   propagatedBuildInputs = [
@@ -40,6 +36,8 @@ buildPythonPackage rec {
     "cirq_google/_version_test.py"
     # Trace/BPT trap: 5
     "cirq_google/engine/calibration_test.py"
+    # Very time-consuming
+    "cirq_google/engine/*_test.py"
   ];
 
   disabledTests = [