$ sudo apt-get update
$ sudo apt-get install compass-susy-plugin 

compass-susy-plugin is installed in your system.

Make ensure the compass-susy-plugin package were installed using the commands given below,

$ sudo dpkg-query -l | grep compass-susy-plugin *

You will get with compass-susy-plugin package name, version, architecture and description in a table

compass-susy-plugin package basic information: