anchor.diff:  
     ldpath = stdenv.lib.makeLibraryPath
       [
  -      dbus_libs gcc.cc glib libdrm libffi libICE libSM libX11 libXmu
  -      ncurses popt qtbase qtdeclarative qtwebkit zlib
  +      dbus_libs fontconfig freetype gcc.cc glib libdrm libffi libICE libSM
  +      libX11 libXcomposite libXext libXmu libXrender libxcb libxml2 libxslt
  +      ncurses zlib
       ];
   
     desktopItem = makeDesktopItem {
  
positive.code: 
      mkdir -p "$out/bin"
      RPATH="${ldpath}:$out/${appdir}"
      makeQtWrapper "$out/${appdir}/dropbox" "$out/bin/dropbox" \
        --prefix LD_LIBRARY_PATH : "$RPATH"
    '';
  
  
negative.code: 
      rm "$out/${appdir}/libdrm.so.2"
      rm "$out/${appdir}/libffi.so.6"
      rm "$out/${appdir}/libGL.so.1"
      rm "$out/${appdir}/libX11-xcb.so.1"
  
      mkdir -p "$out/share/applications"
      cp "${desktopItem}/share/applications/"* $out/share/applications
  