anchor.diff:        Features: https://github.com/xiph/rav1e#features
       '';
       inherit (src.src.meta) homepage;
  +    changelog = "https://github.com/xiph/rav1e/releases/tag/v${version}";
       license = licenses.bsd2;
       maintainers = [ maintainers.primeos ];
       platforms = platforms.all;
  
positive.code: 
  rustPlatform.buildRustPackage rec {
    pname = "rav1e";
    version = "0.3.1";
  
    src = stdenv.mkDerivation rec {
      name = "${pname}-${version}-source";
  
negative.code:       owner = "xiph";
        repo = "rav1e";
        rev = "v${version}";
        sha256 = "0qqw397yfglwj9kg45imhx1p5bb0nsx2gkaxj4lcc9i1hav6ia43";
      };
      cargoLock = fetchurl {
        url = "https://github.com/xiph/rav1e/releases/download/v${version}/Cargo.lock";
        sha256 = "1kdr3q97vq3mip1h7iv2iy9qzlgb69y6nwjzbw9nfi7dl7ip6q3l";
      };
  
      installPhase = ''
  