I’m trying to downgrade to an older version of a cask (calibre). The most recent (unofficial) instructions I could find recommended pointing to the (raw) commit, ie:
brew cask install "https://raw.githubusercontent.com/Homebrew/homebrew-cask/c7d49baf9a6812cc6c4e84fec296d6647ea814d8/Casks/calibre.rb"
but that generates a curl error, which led me to an issue comment stating that brew doesn’t accept commits (any more?). Is there a way to achieve this goal?