diff --git a/xCAT-IBMhpc/share/xcat/IBMhpc/essl/essl_install b/xCAT-IBMhpc/share/xcat/IBMhpc/essl/essl_install
index 540efba28..9033c49f7 100755
--- a/xCAT-IBMhpc/share/xcat/IBMhpc/essl/essl_install
+++ b/xCAT-IBMhpc/share/xcat/IBMhpc/essl/essl_install
@@ -11,8 +11,6 @@
 OS=`uname`
 INSTALL_DIR='/install'
 ESSL_DIR=$essldir
-essl_bin=/opt/ibmmath/essl/4.3/bin
-pessl_bin=/opt/ibmmath/pessl/3.3/bin
 
 if [ -z $ESSL_DIR ]; then
    # try to default
@@ -31,9 +29,11 @@ if [ $OS != "AIX" ]; then
         download_dir=`echo $ESSL_DIR | cut -d '/' -f3-`
         wget -l inf -N -r --waitretry=10 --random-wait --retry-connrefused -t 0 -T 60 -nH --cut-dirs=3 ftp://$SITEMASTER/$download_dir/*.rpm 2> /tmp/wget.log
         rpm -Uvh essl.license*.rpm
-        $essl_bin/install_essl -y -d . -nodocs
+        install_essl=`find /opt/ibmmath/essl -name install_essl -print`
+        $install_essl -y -d . -nodocs
         rpm -Uvh pessl.license*.rpm
-        $pessl_bin/install_pessl -y -d . -nodocs
+        install_pessl=`find /opt/ibmmath/pessl -name install_pessl -print`
+        $install_pessl -y -d . -nodocs
         rm -Rf /tmp/essl
     fi
 
@@ -44,9 +44,12 @@ if [ $OS != "AIX" ]; then
         mkdir $installroot/$tmpdir
         cp -p $ESSL_DIR/* $installroot/$tmpdir
         rpm --root $installroot -Uvh $installroot/$tmpdir/essl.license*.rpm
-        chroot $installroot $essl_bin/install_essl -y -nodocs -d /$tmpdir
+        cd $installroot
+        install_essl=`find opt/ibmmath/essl -name install_essl -print`
+        chroot $installroot /$install_essl -y -nodocs -d /$tmpdir
         rpm --root  $installroot -Uvh $installroot/$tmpdir/pessl.license*.rpm
-        chroot $installroot $pessl_bin/install_pessl -y -nodocs -d /$tmpdir
+        install_pessl=`find opt/ibmmath/pessl -name install_pessl -print`
+        chroot $installroot /$install_pessl -y -nodocs -d /$tmpdir
         rm -rf $installroot/$tmpdir
     fi
 fi