anchor.diff:  
   stdenv.mkDerivation {
     pname = "subdl";
  -  version = "0.0pre.2017.11.06";
  +  version = "unstable-2017-11.06";
   
     src = fetchFromGitHub {
       owner = "alexanderwink";
  
positive.code:     sha256 = "0kmk5ck1j49q4ww0lvas2767kwnzhkq0vdwkmjypdx5zkxz73fn8";
    };
  
    meta = {
      homepage = "https://github.com/alexanderwink/subdl";
      description = "A command-line tool to download subtitles from opensubtitles.org";
  
negative.code:     license = lib.licenses.gpl3;
      maintainers = [ lib.maintainers.exfalso ];
    };
  }
  