Run your end-to-end encrypted chat server using Matrix and Riot (blog.cryptoaustralia.org.au)

> You might get a python-cffi package conflict error at this point which will cause the matrix-synapse install to fail. If this is the case, we'll install Aptitude (an alternative Debian package manager) to help us resolve the conflict semi-painlessly.

An easier way to resolve the conflict is to just run "apt install python-cffi/jessie-backports".