diff --git a/pkgs/development/python-modules/grpcio-tools/default.nix b/pkgs/development/python-modules/grpcio-tools/default.nix
index efae4b102d4..629c51071ab 100644
--- a/pkgs/development/python-modules/grpcio-tools/default.nix
+++ b/pkgs/development/python-modules/grpcio-tools/default.nix
@@ -1,12 +1,12 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, protobuf, grpcio, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, protobuf, grpcio, setuptools }:
 
 buildPythonPackage rec {
   pname = "grpcio-tools";
-  version = "1.34.0";
+  version = "1.34.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "db5a6f0130256d534cbe35eab37d37a448d96f4fd736e5051c6be1aee49cea1d";
+    sha256 = "b411f36748f4ead33411544d785e37825598bbb8abbe79eca422e395be5a3d08";
   };
 
   outputs = [ "out" "dev" ];
@@ -18,6 +18,8 @@ buildPythonPackage rec {
   # no tests in the package
   doCheck = false;
 
+  pythonImportsCheck = [ "grpc_tools" ];
+
   meta = with lib; {
     description = "Protobuf code generator for gRPC";
     license = licenses.asl20;