anchor.diff: -{ stdenv, fetchurl
  +{ stdenv, fetchurl, libsoup, graphicsmagick, SDL, json_glib
   , GConf, atk, cairo, cmake, curl, dbus_glib, exiv2, glib
   , libgnome_keyring, gtk, ilmbase, intltool, lcms, lcms2
   , lensfun, libXau, libXdmcp, libexif, libglade, libgphoto2, libjpeg
   , libpng, libpthreadstubs, libraw1394, librsvg, libtiff, libxcb
  -, openexr, pixman, pkgconfig, sqlite, bash, libxslt }:
  +, openexr, pixman, pkgconfig, sqlite, bash, libxslt, openjpeg
  +, mesa }:
   
   assert stdenv ? glibc;
   
  
positive.code:     homepage = http://darktable.sourceforge.net;
      license = licenses.gpl3Plus;
      platforms = platforms.linux;
      maintainers = [ maintainers.goibhniu ];
    };
  }
  
negative.code:       ilmbase intltool lcms lcms2 lensfun libXau libXdmcp libexif
        libglade libgphoto2 libjpeg libpng libpthreadstubs libraw1394
        librsvg libtiff libxcb openexr pixman pkgconfig sqlite libxslt
        libsoup graphicsmagick SDL json_glib openjpeg mesa
      ];
  
    preConfigure = ''
  