diff --git a/tools/tools/nanobsd/defaults.sh b/tools/tools/nanobsd/defaults.sh
--- a/tools/tools/nanobsd/defaults.sh
+++ b/tools/tools/nanobsd/defaults.sh
@@ -563,7 +563,7 @@
 	echo "mount -o ro /dev/${NANO_DRIVE}${NANO_SLICE_CFG}" > conf/default/etc/remount
 
 	# Put /tmp on the /var ramdisk (could be symlink already)
-	tgt_dir2symlink tmp var/tmp
+	tgt_dir2symlink tmp var/tmp 1777
 
 	) > ${NANO_LOG}/_.dl 2>&1
 )