anchor.diff:  
       meta = with lib; {
         description = "Cross-platform editor for VapourSynth scripts";
  -      homepage = "https://bitbucket.org/mystery_keeper/vapoursynth-editor";
  +      homepage = "https://github.com/YomikoR/VapourSynth-Editor";
         license = licenses.mit;
         maintainers = with maintainers; [ tadeokondrak ];
         platforms = platforms.all;
  
positive.code: { lib, mkDerivation, fetchFromBitbucket, makeWrapper, runCommand
  , python3, vapoursynth
  , qmake, qtbase, qtwebsockets
  }:
  
negative.code: let
    unwrapped = mkDerivation rec {
      pname = "vapoursynth-editor";
      version = "R19-mod-4";
  
      src = fetchFromGitHub {
        owner = "YomikoR";
        repo = pname;
        rev = lib.toLower version;
        sha256 = "sha256-+/9j9DJDGXbuTvE8ZXIu6wjcof39SyatS36Q6y9hLPg=";
      };
  
      nativeBuildInputs = [ qmake ];
  