I see the instructions discuss $(mkdir /zb) <https://github.com/256lights/zb#linux-or-macos https://github.com/256lights/zb#linux-or-macos> and after seeing ref

I see the instructions discuss $(mkdir /zb) <https://github.com/256lights/zb#linux-or-macos https://github.com/256lights/zb#linux-or-macos> and after seeing references to Nix I wanted to ensure this wasn't a hard-and-fast directory choice since macOS has immutable / and it causes no end to the Nix stupidity on macOS