anchor.diff:  , doxygen
   , protobuf
   , crc32c
  -, c-ares
   , fetchurl
   , openssl
  -, zlib
   , libnsl
   }:
   let
  
positive.code:     };
  
      nativeBuildInputs = [ cmake pkg-config ];
      buildInputs = [ c-ares c-ares.cmake-config grpc openssl protobuf zlib ];
  
      postPatch = ''
        sed -e 's,https://github.com/googleapis/googleapis/archive/9c9f778aedde02f9826d2ae5d0f9c96409ba0f25.tar.gz,file://${googleapis},' \
  
negative.code:     sha256 = "15wci4m8h6py7fqfziq8mp5m6pxp2h1cbh5rp2k90mk5js4jb9pa";
    };
  
    buildInputs = [ curl crc32c googleapis-cpp-cmakefiles grpc protobuf libnsl ];
    nativeBuildInputs = [ clang-tools cmake pkg-config doxygen ];
  
    outputs = [ "out" "dev" ];
  