Comment 2 for bug 1747982

Your instinct to install python-gi seems correct. It should provide "gi.repository" which is what I assume the problem is from that error message.

I thought I had actually improved the dependency detection in 17.10 to help avoid problems like this. :(

I don't have an obvious recommendation for what to do to get around this right now. But I'll think about how to test what's wrong here.