I'm using Mac OS Big Sur (11.5.6). I want to install an older version of an ocaml library via brew (4.08.1). I tried to figure out the versions available and typed
$ brew versions ocaml
Error: Unknown command: versions
and then following a recommended link, tried
localhost:Formula davea$ brew tap homebrew/boneyard
==> Tapping homebrew/boneyard
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-boneyard'...
Username for 'https://github.com': myusername
Password for 'https://myusername@github.com':
remote: Repository not found.
fatal: repository 'https://github.com/Homebrew/homebrew-boneyard/' not found
Error: Failure while executing; `git clone https://github.com/Homebrew/homebrew-boneyard /usr/local/Homebrew/Library/Taps/homebrew/homebrew-boneyard --origin=origin --template=` exited with 128.
Now I'm stuck. How do I install an older version of my library, ocaml via brew?