Having finally gotten around to trying it: Here's the answer: By using the
packages meant for Trisquel 6:
So open (with sudo) the /etc/apt/sources.list file, and add a new line that
reads:
"deb http://archive.trisquel.info/trisquel/ toutatis main"
Then update the repos (i.e. by doing sudo apt-get update) and install compiz.
There's one problem, though, with CCSM (See screenshot). I remember seeing
something similar in Manjaro last year (before I moved to Trisquel), though
that might've been with Compiz 0.8.8 while the one from Trisquel 6 was 0.9.x.
Or there's a version in https://launchpad.net/~eugenesan/+archive/ubuntu/ppa
but I didn't test that one.
