anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "cargo-c";
  -  version = "0.7.3";
  +  version = "0.8.0";
   
     src = stdenv.mkDerivation rec {
       name = "${pname}-source-${version}";
  
positive.code:     '';
    };
  
    cargoSha256 = "0z7sjfnnmld5bijn14c7v7arh0vzqmbkjk7bf9ky67acq2r2cv2f";
  
    nativeBuildInputs = [ pkg-config ];
    buildInputs = [ openssl ]
  
negative.code:       owner = "lu-zero";
        repo = pname;
        rev = "v${version}";
        sha256 = "1rvbikhbqsfa2sh79kapqg4yz19r1yhqfykl6cf4yjg6vawkwfw1";
      };
      cargoLock = fetchurl {
        url = "https://github.com/lu-zero/${pname}/releases/download/v${version}/Cargo.lock";
        sha256 = "17cdac8ym59jwjxs3k4isazknhrlr6lw0j0r76n5xf0dd7apfgcs";
      };
  
      installPhase = ''
  