It order to use Compiler.nvim with elixir, you must initialize your project directory with mix proj-name

Then you will be able to use it

Example of using Run REPL

• Mix run require you to :cd your project root dir before using it.
• Run this file does elixir -r current_file. You don't need to initialize a mix project to use this option. So use it as playground along with Run REPL.
• Remember you can open the terminal and run any other available mix commands when you need them.