--- macosx/version.sh~	2007-11-20 21:28:34.000000000 +0200
+++ macosx/version.sh	2007-11-20 21:40:10.000000000 +0200
@@ -14,12 +14,9 @@
               grep -v third-party | \
               cut -d"$Id:" -f3 | cut -d" " -f3 | sort -n | tail -n 1`
 
-if test "x${PEERID_PREFIX//Z/}" = "x$PEERID_PREFIX";
-then
-    STABLE_RELEASE=yes
-else
-    STABLE_RELEASE=no
-fi
+echo $PEERID_PREFIX | egrep -vq 'Z|X' \
+	&& STABLE_RELEASE=yes \
+	|| STABLE_RELEASE=no
   
 # Generate files to be included: only overwrite them if changed so make
 # won't rebuild everything unless necessary