Another nice option is kiex, Elixir version manager: https://github.com/taylor/kiex

It's updated, installing right now.

If you're like me and didn't want to wait, it's a dead-simple build if you want to DIY:

    cd /usr/local/src
    git clone https://github.com/elixir-lang/elixir.git
    cd elixir
    git checkout v1.3.0
    make clean test
    PREFIX=/usr/local/elixir-1.3.0 make install

And then add /usr/local/elixir-1.3.0/bin to your $PATH.