anchor.diff:  { stdenv
   , lib
   , fetchFromGitHub
  +, fetchpatch
   , rustPlatform
   , pkg-config
   , llvmPackages
  
positive.code:     owner = "vectordotdev";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256-RfKg14r3B5Jx2vIa4gpJs5vXRqSXKOXKRFmmQmzQorQ=";
    };
  
    cargoSha256 = "sha256-l2rrT2SeeH4bYYlzSiFASNBxtg4TBm1dRA4cFRfvpkk=";
    nativeBuildInputs = [ pkg-config cmake perl ];
    buildInputs = [ oniguruma openssl protobuf rdkafka zstd ]
      ++ lib.optionals stdenv.isDarwin [ Security libiconv coreutils CoreServices ];
  
negative.code:     platforms = with platforms; all;
    };
  }
  
  