NixOS/nixpkgs — pull request #865 by the-kenny (2013-08-26 00:46:53+00:00)
Title: Fix purity of Elixir and Erlang

The bash scripts of elixir contain some references to ```erl```. This
patch wraps the scripts and extends PATH so ```erl``` is available. It also wraps some erlang scripts which depend on ```sed``` and ```awk```.