I find that a deployment built with mix release does not contain the :instrument module. I am stuck on an older version of Elixir here (1.10), for… reasons. But the instrument module is available when running MIX_ENV=prod iex -S mix run --no-halt (also when running dev).
It’s not an application, so can’t add it to other_applications. I don’t think it is a dependency of some other application: Erlang -- instrument
Do you know if there was some way to figure this out from Erlang docs which I missed? Top of tools user’s guide is basically blank. Same for reference. The individual module docs make no mention of the application. Is there somewhere else I should have looked?