anchor.diff:      owner = "grpc";
       repo = "grpc";
       rev = "v${version}";
  -    sha256 = "391fcc4685cfbb0a0d3840e7ce068664080de54d8897dc2f926825e1d8854d50";
  +    sha256 = "80213afd3f490fc4d3973f085d208656db06b61cd49148e3279bc3c50fb0c57f";
     };
   
     nativeBuildInputs = [
  
positive.code: }:
  
  let
    version = "1.3.6";
  in
  stdenv.mkDerivation {
    name = "grpc-${version}";
  
negative.code:   ];
  
    postPatch = ''
      rm -r third_party/{cares,protobuf,zlib,googletest,boringssl}
      unpackFile ${protobuf-cpp.src}
      mv -v protobuf* third_party/protobuf
  
  