E: 10mount: umount: /var/lib/schroot/mount/click-ubuntu-sdk-14.10-armhf-d77d39e6-ed43-43f9-a18b-c666db5f42e6/home/alan: target is busy
E: 10mount:         (In some cases useful info about processes that
E: 10mount:          use the device is found by lsof(8) or fuser(1).)
E: click-ubuntu-sdk-14.10-armhf-d77d39e6-ed43-43f9-a18b-c666db5f42e6: Chroot setup failed: stage=setup-stop