anchor.diff:  , dvdauthor
   , dvdplusrwtools
   , enca
  -, ffmpeg_3
  +, cdrkit
  +, ffmpeg
   , gettext
   , gtk2
   , gtkmm2
  
positive.code: 
    enableParallelBuilding = true;
  
    meta = with lib; {
      description = "a DVD authoring program for personal computers";
      homepage = "https://www.bombono.org/";
  
negative.code:     dvdauthor
      dvdplusrwtools
      enca
      ffmpeg
      gtk2
      gtkmm2
      libdvdread
  