ok, that doesn't show anything that would explain the incompatibility. How about apt policy g++-9?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1920753 Title: Cannot install build-essential on fresh Ubuntu 20.04.2 installation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/build-essential/+bug/1920753/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
