Oh, I see it comes from Valve themselves. I'm reopening this bug since it's bad for Valve's official steam packages to conflict like this with the Debian/Ubuntu packages.
** Changed in: steam (Ubuntu) Status: Confirmed => Triaged ** Changed in: steam (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1638463 Title: package steam-devices (not installed) failed to install/upgrade: trying to overwrite '/lib/udev/rules.d/99-steam-controller- perms.rules', which is also in package steam-launcher 1.0.0.53 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/steam/+bug/1638463/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs