@juliank: I tried your command (with --simulate) on my own laptop and with this option it says that gnome can't be installed, while plain apt will happily install it.
For the history I'll attach my logging. ** Attachment added: "logging of installing gnome with and without aspcud solver" https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1760810/+attachment/5124299/+files/apt-gnome.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1760810 Title: Non-pinned available package in -proposed not chosen To manage notifications about this bug go to: https://bugs.launchpad.net/auto-package-testing/+bug/1760810/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs