mix deps.get

* (ArgumentError) argument error
:erlang.binary_to_atom(nil, :utf8)
(stdlib) erl_eval.erl:680: :erl_eval.do_apply/6
(stdlib) erl_eval.erl:888: :erl_eval.expr_list/6
(stdlib) erl_eval.erl:240: :erl_eval.expr/5
(stdlib) erl_eval.erl:232: :erl_eval.expr/5
(stdlib) erl_eval.erl:233: :erl_eval.expr/5
(stdlib) erl_eval.erl:888: :erl_eval.expr_list/6
(stdlib) erl_eval.erl:240: :erl_eval.expr/5

defmodule Fw.MixProject do
use Mix.Project

@target System.get_env("MIX_TARGET") || "host"

def project do
[
  app: :fw,
  version: "0.1.0",
  elixir: "~> 1.4",
  target: @target,
  archives: [nerves_bootstrap: "~> 1.0"],
  deps_path: "deps/#{@target}",
  build_path: "_build/#{@target}",
  lockfile: "mix.lock.#{@target}",
  start_permanent: Mix.env() == :prod,
  aliases: [loadconfig: [&bootstrap/1]],
  deps: deps()
]
end

# Starting nerves_bootstrap adds the required aliases to Mix.Project.config()
# Aliases are only added if MIX_TARGET is set.
 def bootstrap(args) do
 Application.start(:nerves_bootstrap)
 Mix.Task.run("loadconfig", args)
end

# Run "mix help compile.app" to learn about applications.
def application do
 [
   mod: {Fw.Application, []},
   extra_applications: [:logger, :runtime_tools]
 ]
end

# Run "mix help deps" to learn about dependencies.
defp deps do
[
  {:nerves, "~> 1.3", runtime: false},
  {:nerves_network, "~> 0.3"},
  {:ui, path: "../ui"},
  {:shoehorn, "~> 0.2"}
] ++ deps(@target)
end

# Specify target specific dependencies
defp deps("host"), do: []

defp deps(target) do
  [
    {:nerves_runtime, "~> 0.8"}
  ] ++ system(target)
end

 defp system("rpi"), do: [{:nerves_system_rpi, "~> 1.0", runtime: false}]
 defp system("rpi0"), do: [{:nerves_system_rpi0, "~> 1.0", runtime: false}]
 defp system("rpi0_wiringPi"), do: [{:nerves_system_rpi0_wiringPi, path: "../nerves_system_rpi0_wiringPi", runtime: false}]
 defp system("rpi2"), do: [{:nerves_system_rpi2, "~> 1.0", runtime: false}]
 defp system("rpi3"), do: [{:nerves_system_rpi3, "~> 1.0", runtime: false}]
 defp system("bbb"), do: [{:nerves_system_bbb, "~> 1.0", runtime: false}]
 defp system("ev3"), do: [{:nerves_system_ev3, "~> 1.0", runtime: false}]
 defp system("qemu_arm"), do: [{:nerves_system_qemu_arm, "~> 1.0", runtime: false}]
 defp system("x86_64"), do: [{:nerves_system_x86_64, "~> 1.0", runtime: false}]
 defp system(target), do: Mix.raise("Unknown MIX_TARGET: #{target}")
end

clicky
  fw
  ui
  nerves_system_rpi0_wiringPi