Trisquel 7: how to install compiz?

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.

It has been added to the repo. after the release of Belenos.