Elixir: Find the currently installed Phoenix version number

After looking around for it a bit, I found the way to get the currently installed Phoenix framework version number is in the phoenix.new mix task;

$ mix phoenix.new -v
Phoenix v1.0.2

That makes sense, as you get the Phoenix installer (which includes the mix phoenix.new task) when downloading the latest release. Phoenix itself is simply the application dependency, which includes the application specific mix tasks (like phoenix.routes and phoenix.server).