anchor.diff:  }:
   
   let
  -  version = "1.3.6";
  +  version = "1.4.0";
   in
   stdenv.mkDerivation {
     name = "grpc-${version}";
  
positive.code:     owner = "grpc";
      repo = "grpc";
      rev = "v${version}";
      sha256 = "391fcc4685cfbb0a0d3840e7ce068664080de54d8897dc2f926825e1d8854d50";
    };
  
    nativeBuildInputs = [
  
negative.code:   ];
  
    postPatch = ''
      rm -r third_party/{cares,protobuf,zlib,googletest,boringssl}
      unpackFile ${protobuf-cpp.src}
      mv -v protobuf* third_party/protobuf
  
  