 
             Mix.raise("""
             fwup #{@fwup_semver} is required for Nerves.
+
             You are running #{vsn}.
             Please see https://hexdocs.pm/nerves/installation.html#fwup
             for installation instructions

  end

  def check_host_requirements(_), do: nil

  def debug_info(msg) do
    if System.get_env("NERVES_DEBUG") == "1" do

  def check_requirements("fwup") do
    case System.find_executable("fwup") do
      nil ->
        Mix.raise(missing_package_message("fwup"))

      _ ->
        with {vsn, 0} <- System.cmd("fwup", ["--version"]),
