virt-manager stopped working after upgrade

Today, virt-manager refused to start any VM:

Error starting domain: internal error: Failed to load module

/usr/lib/ version `LIBVIRT_PRIVATE_8.2.0'

not found (required by

It turned out it was because libvirt was upgraded and it didn't restart its deamon:

$ grep -w libvirt /var/log/pacman.log
[2022-04-04T09:37:24+0200] [ALPM] upgraded libvirt (1:8.1.0-4 -> 1:8.2.0-3)

To fix this, I just restarted libvirtd:

# systemctl restart libvirtd

With that, virt-manager could start my VMs again 🎉

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