mwhudson@aeglos:~$ schroot -e --all-sessions
E: 10mount: umount: /var/lib/schroot/mount/xenial-amd64-52371fd8-4124-4584-a4ca-f53d43284765/home/mwhudson: 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: xenial-amd64-52371fd8-4124-4584-a4ca-f53d43284765: Chroot setup failed: stage=setup-stop