Comment by JamesSwift

Most nix users still use brew for casks on mac. Using brew bundle as your interface to it makes things almost seamless, so its not too icky overall.

eg I manage my Brewfile declaratively with home-manager, and then run this on file change

        HOMEBREW_NO_UPDATE_REPORT_NEW=1 HOMEBREW_NO_AUTO_UPDATE=1 brew bundle --file="$HOME/Brewfile" --cleanup --no-upgrade