Aha, ok. I assume I run this on the host? That zfs command seems to be in both zfsutils-linux and zfs-fuse; which one should I be using?
$ zfs list -t all
Command 'zfs' not found, but can be installed with:
sudo apt install zfsutils-linux # version 0.8.3-1ubuntu12.1, or
sudo apt install zfs-fuse # version 0.7.0-20
Normally I’d choose the most recent version, but it seems weird to me that they’re different packages, so I don’t want to be using the wrong thing.