This is a Mix package, so you must install it using Mix (Available in Hex). To use it you can add it in your project mix.exs:

def deps do
    {:archeometer, "~> 0.2", only: [:dev, :test], runtime: false},

Or alternatively, you can clone this repository and add the dependency as a path: "path/to/the/repo" instead.

And then just run

mix deps.get