Snapshotting a Linux container in Debian

I know that the command $ lxc-snapshot exists somewhere, but it seems that it's not available on Debian? Forgive my Linux ignorance - but how do I get a hold of this capability? Is there an alternative for Debian?

Also, if you need this info, the result of $ uname -a:

Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1+deb7u1 x86_64 GNU/Linux