Guile Homebrew Tap
How do I install these formulae?
If you installed Guile through Homebrew before May 28, 2020, you will need to reinstall it:
brew reinstall guile
After that you can do any of the following:
brew install aconchillo/guile/<formula>
brew tap aconchillo/guile and then
brew install <formula>.
Or install via URL (which will not receive updates):
brew install https://raw.githubusercontent.com/aconchillo/homebrew-guile/master/Formula/<formula>.rb
man brew or check Homebrew's documentation.