A dead simple script that installs (build) dependencies, clones Supercollider, builds it, and finally will install it.
3.11
$ git clone https://github.com/lvm/build-supercollider/
$ cd build-supercollider
$ sh build-supercollider.sh
$ sh build-sc3-plugins.sh
That's all.
Keep in mind this script works on Debian-derivates distributions (such as Ubuntu, Mint, etc). Sorry Windows, OS X, and other GNU/linux distros.
See README-deb.md for thoughts on making .deb packages.