Thanks for reporting. I found a corresponding bug report in Debian, and the extra dependency has been added in the version available in Ubuntu 21.04, so newer releases are fixed at least. However, 20.04 is still affected, so I'll try to prepare a debdeff for a Stable Release Update.
(From my testing 18.04 was not affected. Presumably this uses an older version before cpuset started using python3-future) As a workaround in the meantime, manually install python3-future. ** Bug watch added: Debian Bug tracker #981227 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981227 ** Also affects: cpuset (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981227 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1907881 Title: cpuset package missing dependency in focal To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cpuset/+bug/1907881/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
