Debugging in iex of erlang release with elixir 1.5

Questions / Help
1

Following https://www.youtube.com/watch?v=LE2y4kh56pQ, I tried to debug on erlang release that made with distillery.

./myapp remote_console
iex) break! MyApp.Hello
iex) MyApp.Hello

But it just freeze.
I think it’s maybe related to pry, but I don’t know how to solve the problem.