As a final check, I reinstalled the package again. Now apt is finding it properly:
$ sudo apt-get reinstall libvirt-dev [sudo] password for trinitronx: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 54 not upgraded. Need to get 161 kB of archives. After this operation, 0 B of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 libvirt-dev amd64 6.0.0-0ubuntu8.15 [161 kB] Fetched 161 kB in 1s (201 kB/s) (Reading database ... 563591 files and directories currently installed.) Preparing to unpack .../libvirt-dev_6.0.0-0ubuntu8.15_amd64.deb ... Unpacking libvirt-dev:amd64 (6.0.0-0ubuntu8.15) over (6.0.0-0ubuntu8.15) ... Setting up libvirt-dev:amd64 (6.0.0-0ubuntu8.15) ... So it's safe to close this bug. The system was missing universe & multiverse components under the focal-updates pocket, as you suspected. Thanks again! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1956169 Title: Cannot install libvirt-dev on Ubuntu 20.04 / focal Dependency conflict - needs repackage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1956169/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs