The make-unity helper has been broken since around 2017-12-01, which means that the current version of unity in flidas depends on a virtual package which no longer exists.
We should fix this helper lest there be some people running Unity on T7 who try to upgrade.
Automatically closed -- issue fixed for 2 weeks with no activity.
Helper should work now:
https://devel.trisquel.info/trisquel/package-helpers/commit/2b2cd6736259fb65244aed6d54375bfc4dc048cd