diff -Naur --exclude '*~' nag-h3-2.3.1/config/prefs.php.dist nag-h3-2.3.1-fix-constant-loading/config/prefs.php.dist
--- nag-h3-2.3.1/config/prefs.php.dist	2008-07-02 18:15:45.000000000 +0200
+++ nag-h3-2.3.1-fix-constant-loading/config/prefs.php.dist	2008-11-18 22:47:56.000000000 +0100
@@ -6,7 +6,7 @@
  */
 
 // Make sure that constants are defined.
-require_once dirname(__FILE__) . '/../lib/Nag.php';
+require_once '/usr/share/horde/nag/lib/Nag.php';
 
 $prefGroups['display'] = array(
     'column' => _("General Options"),