diff --git a/starss_install.sh b/starss_install.sh
index fbf9876..4d7c886 100755
--- a/starss_install.sh
+++ b/starss_install.sh
@@ -22,7 +22,16 @@ COMPILER_VERSION=${COMPILER_VERSION:=}
 # package to build
 CATEGORY=""
 PACKAGE="StarSs"
-VERSION="2.3"
+VERSION="2.3-r20"
+SVN_BUILD="yes"  # yes|no
+
+if [ "$SVN_BUILD" == "yes" ]; then
+    module use /opt/amtopt/autotools/modulefiles  
+    module use ~/modulefiles  # we should build a complete toolstack for AMT...
+    module load local
+    module load tools/gperf
+    module load tools/bison-rofi  # bison-2.4.2 seems to work, too
+fi
 
 # add a descriptor at the end of the installation path e.g. for special config options etc.
 PACKAGE_DESCRIPTOR=${PACKAGE_DESCRIPTOR:+-$PACKAGE_DESCRIPTOR}