This should help further debugging. Also, no need to formulae that aren't `*.rb` files as they'll be rejected later anyway (and already were before we changed the `Homebrew::EnvConfig.forbid_packages_from_paths?` defaults).
Library
This directory contains all the code run by the official brew command in Homebrew and all formulae (package descriptions) in taps (repositories containing formulae) in Taps subdirectories.