anchor.diff:  
     buildInputs = [
       aalib
  +    alsa-lib
       atk
       babl
       bzip2
  
positive.code:     poppler
      pythonPackages.python
      pythonPackages.pygtk
      xorg.libXext
      xorg.libXfixes
      xorg.libXmu
      xorg.libXpm
      zlib
      ice
    ];
  
    pythonPath = [
  
negative.code: , pango
  , poppler
  , xorg
  , xz
  , zlib
  }:
  
  stdenv.mkDerivation rec {
  