Unity is fixed in Trisquel, the problem is that the system updates the
packages when there is a new version upstream. So, even if we fixed the
issue, we have to wait for one of the "core developers" to build the package
or wait for a new verions upstream.
I know this is frustrating but it is real. If you want the updated package,
try cloning the actual repo and build the packages yourself:
https://devel.trisquel.info/trisquel/package-helpers
you have to install the dependencies before building the package. You have to
read the documentation.