diff --git a/release/tools/vmimage.subr b/release/tools/vmimage.subr
--- a/release/tools/vmimage.subr
+++ b/release/tools/vmimage.subr
@@ -187,7 +187,7 @@
 			-o poolname=zroot -o bootfs=zroot/ROOT/default -o rootpath=/ \
 			-o fs=zroot\;mountpoint=none \
 			-o fs=zroot/ROOT\;mountpoint=none \
-			-o fs=zroot/ROOT/default\;mountpoint=/ \
+			-o fs=zroot/ROOT/default\;mountpoint=/\;canmount=noauto \
 			-o fs=zroot/home\;mountpoint=/home \
 			-o fs=zroot/tmp\;mountpoint=/tmp\;exec=on\;setuid=off \
 			-o fs=zroot/usr\;mountpoint=/usr\;canmount=off \