anchor.diff:  , 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
   }:
  
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
  