I am still on Trisquel 7 but anyway:
Additionally, I do not know how to connect to other repositories such
as the Trisquel 8 repositories to see if some of the missing packages might
be available.
Isn't there "Software & Update" (or something like that) in the "MATE Control
Center"? Alternat
> All that said, I would not advise you to add Trisquel's repository to Uruk.
> It is a recipe for disaster.
As of the last time I tried Uruk, it included the Trisquel 8 repository by
default. The Uruk repository appeared to consist of a handful of packages to
compliment those from Trisquel.