--- postfix.old	2008-03-21 00:08:57.000000000 +0100
+++ postfix	2008-04-08 21:33:04.000000000 +0200
@@ -10,11 +10,11 @@
 # queue_directory = /var/spool/postfix.alt
 # data_directory = /var/lib/postfix.alt
 
 CONF_DIR="/etc/postfix"
 CONF_OPT="${SVCNAME##*.}"
-if [[ -n ${CONF_OPT} && ${SVCNAME} != "postfix" ]]; then
+if [ -n "${CONF_OPT}" -a "${SVCNAME}" != "postfix" ]; then
 	CONF_DIR="${CONF_DIR}.${CONF_OPT}"
 fi
 
 opts="${opts} reload"