If I have a directory that I bootstraped with debootstrap that I got inside of running systemd-nspawn what do I have to do make its internal systemd functional?

$ sudo systemd-nspawn -D ./foo Spawning container mschroot on /opt/foo. Press ^] three times within 1s to kill container. root@foo:~# systemctl Failed to connect to bus: No such file or directory

If I manually try to mount --bind I get a different error,

$ sudo mount --bind /proc /opt/foo/proc $ sudo chroot /opt/foo/ root@x230:/# systemctl Running in chroot, ignoring request.

Inside that chroot there is a service installed that I would like to start?