anchor.diff:      babl
       bzip2
       cairo
  +    fixesproto
       freetype
       fontconfig
       gdk-pixbuf
  
positive.code:     pythonPackages.python
      pythonPackages.pygtk
      shared-mime-info
      xorg.fixesproto
      xorg.libICE
      xorg.libSM
      xorg.libX11
      xorg.libXcursor
      xorg.libXext
      xorg.libXfixes
      xorg.libXmu
      xorg.libXpm
      xorg.libXt
      xorg.xproto
      xz
      zlib
    ];
  
negative.code: , lcms2
  , libexif
  , libgudev
  , libice
  , libjpeg
  , libmng
  , libmypaint
  , libpng
  , librsvg
  , libsm
  , libtiff
  , libwebp
  , libwmf
  , libx11
  , libxext
  , libxfixes
  , libxt
  , libzip
  , openexr
  , pango
  , poppler
  , shared-mime-info
  , xorg
  , xproto
  , xz
  , zlib
  }:
  