Unmount leftover chroot bind mounts before zpool export #42

Merged

beatzaplenty merged 1 commits from worktree-baremetal-emergency-access into main

2026-07-22 04:10:09 +00:00

Author	SHA1	Message	Date
beatzaplenty	9bb626327f	Unmount nixos-install's leftover chroot bind mounts before zpool export Check NixOS configurations / eval-hosts (pull_request) Successful in 10m20s Details nixos-install bind-mounts /dev, /proc, /sys (and usually /run) into /mnt to run the target's activation script in a chroot, and doesn't unmount them again afterward. Left in place, those nested mounts made ZFS refuse to unmount its own root dataset at /mnt: zpool export failed with "cannot unmount '/mnt': pool or dataset busy", and because of this script's set -e, that killed the script before it ever reached reboot -- silently defeating the export-before-reboot fix from #40 on every real run, which is why the ZFS-import stall kept recurring.	2026-07-22 04:07:32 +00:00

Author

SHA1

Message

Date

beatzaplenty

9bb626327f

Unmount nixos-install's leftover chroot bind mounts before zpool export

Check NixOS configurations / eval-hosts (pull_request) Successful in 10m20s

Details

nixos-install bind-mounts /dev, /proc, /sys (and usually /run) into
/mnt to run the target's activation script in a chroot, and doesn't
unmount them again afterward. Left in place, those nested mounts made
ZFS refuse to unmount its own root dataset at /mnt: zpool export
failed with "cannot unmount '/mnt': pool or dataset busy", and because
of this script's set -e, that killed the script before it ever reached
reboot -- silently defeating the export-before-reboot fix from #40 on
every real run, which is why the ZFS-import stall kept recurring.

2026-07-22 04:07:32 +00:00