anchor.diff:  { stdenv, fetchurl, lib, vdr
   , libav, libcap, libvdpau
  -, xineLib, libjpeg, libextractor, mesa, libGLU
  +, xineLib, libjpeg, libextractor, libglvnd, libGLU
   , libX11, libXext, libXrender, libXrandr
   , makeWrapper
   }: let
  
positive.code:       url = "mirror://sourceforge/project/xineliboutput/xineliboutput/${name}/${name}.tgz";
        sha256 = "1phrxpaz8li7z0qy241spawalhcmwkv5hh3gdijbv4h7mm899yba";
      };
  
      # configure don't accept argument --prefix
      dontAddPrefix = true;
  
negative.code:       libcap
        libextractor
        libjpeg
        libglvnd
        libGLU
        libvdpau
        libXext
        libXrandr
        libXrender
        libX11
        vdr
        xineLib
      ];
  