anchor.diff:      rm -r third_party/{cares,protobuf,zlib,googletest,thrift,boringssl}
       unpackFile ${protobuf-cpp.src}
       mv -v protobuf* third_party/protobuf
  +
  +    sed -i 's, -Werror,,g' Makefile
     '';
   
     NIX_CFLAGS_LINK = [
  
positive.code:     owner = "grpc";
      repo = "grpc";
      rev = "v${version}";
      sha256 = "60782ecec66f91a4a0f4994842fb98c1de57d5450eb43f82c6ed8e0b1c20946f";
    };
  
    nativeBuildInputs = [
  
negative.code: }:
  
  let
    version = "1.3.6";
  in
  stdenv.mkDerivation {
    name = "grpc-${version}";
  