I wrote https://github.com/Freaky/zfsnapr https://github.com/Freaky/zfsnapr a few months ago so I could finally have point-in-time consistent Borg backups with

I wrote https://github.com/Freaky/zfsnapr https://github.com/Freaky/zfsnapr a few months ago so I could finally have point-in-time consistent Borg backups with ZFS snapshots, without having the mess of teaching Borg where every .zfs directory was. It recursively snapshots mounted pools, and recursively mounts snapshots of the mounted datasets into a target ready to point your backup tools at. I do so via a chroot so I didn't need to make any changes to my Borg setup - just to how I run it.