anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "cargo-c";
  -  version = "0.8.1";
  +  version = "0.9.2";
   
     src = stdenv.mkDerivation rec {
       name = "${pname}-source-${version}";
  
positive.code:     '';
    };
  
    cargoSha256 = "0b952xkg0l31laqlhsv3cqdag7v15k9na6xr6q9y8xwy1fjh9gzv";
  
    nativeBuildInputs = [ pkg-config ];
    buildInputs = [ openssl ]
  
negative.code:       owner = "lu-zero";
        repo = pname;
        rev = "v${version}";
        sha256 = "0hvlrhmbplx4cj4l5fynihgr9cdh0rkpwvipizk1gpp6p1ksr5hz";
      };
      cargoLock = fetchurl {
        url = "https://github.com/lu-zero/${pname}/releases/download/v${version}/Cargo.lock";
        sha256 = "0ckn31asz7013206j153ig96602dxvxm6skdz1plan0h05j5mgah";
      };
  
      installPhase = ''
  