anchor.diff:      owner = "grpc";
       repo = "grpc";
       rev = "v${version}";
  -    sha256 = "60782ecec66f91a4a0f4994842fb98c1de57d5450eb43f82c6ed8e0b1c20946f";
  +    sha256 = "391fcc4685cfbb0a0d3840e7ce068664080de54d8897dc2f926825e1d8854d50";
     };
   
     nativeBuildInputs = [
  
positive.code: }:
  
  let
    version = "1.3.0";
  in
  stdenv.mkDerivation {
    name = "grpc-${version}";
  
negative.code:     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 = [
  