That would mean everything in the distro should run system python3 explicitly, or different things are tend to break from time to time, which is definitely not the way to go.
You would need to install the missing python3 modules to make it work, in this specific case that would be Gobject Introspection. ** Changed in: ibus (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1611523 Title: ibus-setup fails with local python3 Status in ibus package in Ubuntu: Invalid Bug description: If a user has installed a local python3 (e.g. Anaconda) ibus-setup may fail to run because of a missing library: Traceback (most recent call last): File "/usr/share/ibus/setup/main.py", line 31, in <module> from gi.repository import GLib ImportError: No module named 'gi' This error can be avoided if ibus-setup explicitly executes the system python3 rather than the first python3 found in $PATH, by changing: exec python3 /usr/share/ibus/setup/main.py $@ to: exec /usr/bin/python3 /usr/share/ibus/setup/main.py $@ ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ibus 1.5.11-1ubuntu2 ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10 Uname: Linux 4.4.0-24-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: XFCE Date: Tue Aug 9 14:17:20 2016 InstallationDate: Installed on 2016-06-24 (45 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) SourcePackage: ibus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1611523/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp