anchor.diff:      libxfixes
       libxt
       libzip
  +    mypaint-brushes
       openexr
       pango
       poppler
  +    poppler-data
       python2Packages.python
       python2Packages.pygtk
       shared-mime-info
  
positive.code: }:
  
  let
    major = "2.9";
    patch = "8";
  
    version = "${major}.${patch}";
  in
  
negative.code:   preBuild = ''
      # Build depends on shared-mime-info
      export XDG_DATA_DIRS="$XDG_DATA_DIRS''${XDG_DATA_DIRS:+:}${shared-mime-info}/share"
  
      # Build depends gdk pixbuf loaders
      export GDK_PIXBUF_MODULE_FILE='${gdk-pixbuf.loaders.cache}'
    '';
  
    postInstall = ''
  