I think you’re better to use kiex and kerl to manage the Elixir / Erlang version.

Since quite a number of libraries are depending the newer version Elixir

First as I remember Ubuntu had outdated Erlang.
To install the latest erlang http://devblog.avdi.org/2013/07/05/installing-elixir-on-ubuntu-13-04/

Second you don’t need to install Elxiir. You can download binary files and add location to your path.

This is how you can have the latest setup.

PS
Now I am running http://neon.kde.org/

Off topic:
If you want cool console for kde try Yakuake

If you want cool shell try Oh My Fish

And you will never back to windows OS again

Have you tried installing libssl-dev first?

I’m not that familiar with Ubuntu but I guess with something like:

sudo apt-get install libssl-dev

Thanks.

I started from scratch and installed from the repository as described on https://www.erlang-solutions.com/resources/download.html.

wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
sudo dpkg -i erlang-solutions_1.0_all.deb
sudo apt-get update
sudo apt-get install esl-erlang
sudo apt-get install elixir

This gives me the following versions:

root@simon:~# iex
Erlang/OTP 18 [erts-7.3] [source-d2a6d81] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Interactive Elixir (1.2.3) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> 

I will have a look at the Elixir binary files if I need a newer version. Thanks.

And I will give KDE neon a try as well. Looking good.

Edit:
Just installed KDE neon. Looks refreshing, clean, easy to use.