anchor.diff:          # Fall back to this url for versions not available at releases.mozilla.org.
           "ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/${firefoxVersion}/source/firefox-${firefoxVersion}.source.tar.bz2"
       ];
  -    sha1 = "816d64e8c9432349cd208fd181d210c54f985351";
  +    sha1 = "6a3a965c165ceda8c5ba038e9fe0136fbd1690ff";
     };
   
     commonConfigureFlags =
  
positive.code: 
  rec {
  
    firefoxVersion = "19.0";
  
    xulVersion = "19.0"; # this attribute is used by other packages
  
  
    src = fetchurl {
  
negative.code: { stdenv, fetchurl, pkgconfig, gtk, pango, perl, python, zip, libIDL
  , libjpeg, libpng, zlib, cairo, dbus, dbus_glib, bzip2, xlibs
  , freetype, fontconfig, file, alsaLib, nspr, nss, libnotify
  , yasm, mesa, sqlite, unzip, makeWrapper, pysqlite
  
  , # If you want the resulting program to call itself "Firefox" instead
  