Index: usr.sbin/bsdinstall/scripts/umount
===================================================================
--- usr.sbin/bsdinstall/scripts/umount
+++ usr.sbin/bsdinstall/scripts/umount
@@ -40,3 +40,4 @@
 
 umount $BSDINSTALL_CHROOT/dev 2>/dev/null
 umount -F $TMP_FSTAB -a 2>/dev/null
+zfs umount -a