I ran apt-get install dh-python
this removed python-is-python2 and upgraded dh-python apt-cache policy dh-python now shows dh-python: Installed: 4.20200925 Candidate: 4.20200925 Version table: *** 4.20200925 500 500 http://gb.archive.ubuntu.com/ubuntu groovy/universe amd64 Packages 500 http://gb.archive.ubuntu.com/ubuntu groovy/universe i386 Packages 100 /var/lib/dpkg/status I then used apt-get install python and was told to install python-is-python2, which I did. This removed dh-python. I will now try to upgrade to 21.04, when I can -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1936669 Title: Software Update won't install version 21.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1936669/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs