anchor.diff:      shared-mime-info
       xorg.libXmu
       xorg.libXpm
  -    xproto
  +    xorgproto
       xz
       zlib
     ];
  
positive.code: , poppler
  , shared-mime-info
  , xorg
  , xproto
  , xz
  , zlib
  }:
  
negative.code:     babl
      bzip2
      cairo
      freetype
      fontconfig
      gdk-pixbuf
  