nerves-project/nerves v1.3.0

on GitHub

This version adds support for Elixir ~> 1.7 which requires updates to your
Mix project.

Modify the release config

It is required to modify the rel/config.exs file.

Change this:

release :my_app do
  set version: current_version(:my_app)
  plugin Shoehorn
  if System.get_env("NERVES_SYSTEM") do
    set dev_mode: false
    set include_src: false
    set include_erts: System.get_env("ERL_LIB_DIR")
    set include_system_libs: System.get_env("ERL_SYSTEM_LIB_DIR")
    set vm_args: "rel/vm.args"
  end
end

To this:

release :my_app do
  set version: current_version(:my_app)
  plugin Shoehorn
  plugin Nerves
end

Update shoehorn

You will need to update your version of shoehorn to {:shoehorn, "~> 0.4"}.