Comment 0 for bug 2058278

When installing libvirt-daemon-system (from https://launchpad.net/~canonical-server/+archive/ubuntu/server-backports) on a Focal system, one will see the following error:

# apt install libvirt-daemon-system
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libvirt-daemon-system : Depends: polkitd but it is not installable
                         Depends: polkitd-pkla but it is not installable
                         Recommends: dnsmasq-base
                         Recommends: mdevctl but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

As discussed with Bryce, I believe polkit should be backported to Focal as well.