diff --git a/Pmodules/modbuild.in b/Pmodules/modbuild.in
index ddec29a..b8c050c 100755
--- a/Pmodules/modbuild.in
+++ b/Pmodules/modbuild.in
@@ -51,6 +51,7 @@ source libpmodules.bash    || \
 # save arguments, (still) required for building dependencies
 declare -r	ARGS="$@"
 
+#set   -o	nounset
 shopt -s	nocaseglob
 shopt -s	extglob
 shopt -s	nullglob