With the release of Elixir 1.14, Elixir 1.9 is now end-of-life. Elixir 1.10 Release Notes: https://github.com/elixir-lang/elixir/releases/tag/v1.10.0
So we can skip updating and installing the same packages a million times. It will still grab the hex.pm stuff -- maybe we can find a way to avoid this, too.