anchor.diff:      unpackFile ${protobuf-cpp.src}
       mv -v protobuf* third_party/protobuf
   
  +    grep -q '\-Werror' Makefile
       sed -i 's, -Werror,,g' Makefile
     '';
   
  
positive.code: }:
  
  let
    version = "1.14.0";
  in
  stdenv.mkDerivation {
    name = "grpc-${version}";
  
negative.code:     owner = "grpc";
      repo = "grpc";
      rev = "v${version}";
      sha256 = "10447120a6bd14b4bed93ef30251b2ae59ea2f89c38c4b1c274bf1a7e9f619c0";
    };
  
    nativeBuildInputs = [
  