--- bin/as_run.orig	2009-12-23 15:53:06.000000000 +0100
+++ bin/as_run	2010-02-02 19:21:17.000000000 +0100
@@ -17,13 +17,7 @@
 #    1 AVENUE DU GENERAL DE GAULLE, 92141 CLAMART CEDEX, FRANCE.
 # ==============================================================================
 
-set_prefix() {
-   local this=`readlink -n -f $1`
-   local bin=`dirname $this`
-   prefix=`dirname $bin`
-}
-
-set_prefix $0
+prefix=?ASTER_ROOT?
 
 # set environment
 if [ -f /etc/codeaster/profile.sh ]; then
