Yesterday I upgraded my #FreeBSD NAS to 15.0. I made the mistake of not running freebsd-update to apply the bugfix patches for 14.2 before upgrading to 15.0, and upon reboot and running the command a second time, I was met with a dreadful error that broke my system. libc now depends on libsys, but libsys was nowhere to be found.

Some research pointed me to the FreeBSD bugzilla and it turns out that the unpatched updater doesn't prioritize installing libsys before libc.

But thankfully, I'm on ZFS. freebsd-update install automatically makes a snapshot of the root pool before applying the patches. So I booted the snapshot, set it as default, and did the upgrade properly this time.

And now my NAS is on 15.0 🎉