Code review comment for lp:~alan-griffiths/mir/fix-1526658

There's an additional fix I want to do on this bug this week:
Add debian packaging magic to simply force the broken packages to be uninstalled.

Because once you've loaded and tried to probe mir-client-platform-mesa2 finding out it's not the right one, it's already too late. It has already leaked a handle to itself (which will happen with this branch too).

That change is much more important than this one. But I haven't reviewed this in detail yet.