mix.exs

defmodule Standalone.Mixfile do
  use Mix.Project

  def project do
    [ app: :standalone,
      version: "0.0.1",
      elixir: "~> 0.12.3-dev",
      escript_main_module: Standalone.Main,
      deps: deps ]
  end

  # Configuration for the OTP application
  def application do
    [
	mod: { Standalone, [] },
	applications: [:httpoison]
    ]
  end

  # Returns the list of dependencies in the format:
  # { :foobar, git: "https://github.com/elixir-lang/foobar.git", tag: "0.1" }
  #
  # To specify particular versions, regardless of the tag, do:
  # { :barbat, "~> 0.1", github: "elixir-lang/barbat" }
  defp deps do
    [
	{:httpoison, github: "edgurgel/httpoison"}
    ]
  end
end

standalone.ex

defmodule Standalone do
  use Application.Behaviour

  # See http://elixir-lang.org/docs/stable/Application.Behaviour.html
  # for more information on OTP Applications
  def start(_type, _args) do
    Standalone.Supervisor.start_link
  end
end

defmodule Standalone.Main do
	def main(_) do
		IO.puts "#{inspect HTTPoison.get "google.com/"}"
	end
end