paradoxxxzero/gnome-shell-system-monitor-applet — pull request #220 by p91paul (2013-08-28 13:17:33+00:00)
Title: Improve function existance checking

You originally check on the gnome-shell version. However, Debian testing version of gnome-shell is 3.4.2, but seem's like that they backported something, because new Clutter.Color() is broken while Clutter.Color.from_string works.
Instead, you can check about the existance of the from_string function in Color.
This should work for both older and newer systems.