I have a module which defines a behavior

defmodule Light.Trigger do
  @callback initialize(%{}) :: {:ok, any()}

  defmacro __using__(_) do
    quote do
      use GenServer
      @behaviour Light.Trigger
      ...
    end
end

And I am using it like

defmodule Light.Test do
  use Light.Trigger
  
  @impl true
  def initialize(state) do
    {:ok, state}
  end

  @impl true
  def handle_info(:test, state) do
    ...
    {:noreply, state}
  end
end

This happens

iex> Light.Test.module_info[:attributes][:behaviour]
[GenServer]

But it should be

iex> Light.Test.module_info[:attributes][:behaviour]
[GenServer, Trigger]

right?