I couldn't find a report filed on this issue upstream already so I have done so and added a bug watch to monitor that here.
** Bug watch added: GNOME Bug Tracker #765482 https://bugzilla.gnome.org/show_bug.cgi?id=765482 ** Also affects: gnome-software via https://bugzilla.gnome.org/show_bug.cgi?id=765482 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1573206 Title: Ubuntu Software does not install third-party .deb packages To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-software/+bug/1573206/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs