Reloading not working with single-file exs app?

[thbar]

I tried adding reloading to a simple Bandit/Plug app:

Mix.install([
  {:bandit, "~> 1.9"},
  {:exsync, "~> 0.4.1"}
])

defmodule MyPlug do
  import Plug.Conn

  def init(options) do
    options
  end

  def call(conn, _opts) do
    conn
    |> put_resp_content_type("text/plain")
    |> send_resp(200, "Hello world - it's #{DateTime.utc_now()}")
  end
end

Bandit.start_link(plug: MyPlug)
Process.sleep(:infinity)

Running it with elixir web.exs, I see ExSync starting, but nothing happens if I modify & save web.exs.

Not sure what is happening yet!