Index: /usr/src/include/mk-osreldate.sh
===================================================================
--- /usr/src/include/mk-osreldate.sh	(revision 255921)
+++ /usr/src/include/mk-osreldate.sh	(working copy)
@@ -36,7 +36,9 @@
 ${ECHO} creating osreldate.h from newvers.sh
 
 export PARAMFILE="${PARAM_H:=$CURDIR/../sys/sys/param.h}"
-. "${NEWVERS_SH:=$CURDIR/../sys/conf/newvers.sh}"
+set +e
+. "${NEWVERS_SH:=$CURDIR/../sys/conf/newvers.sh}" || exit 1
+set -e
 cat > $tmpfile <<EOF
 $COPYRIGHT
 #ifdef _KERNEL