Stale homebrew version

[tekumara]

When installed from homebrew as per README.md, I end up with an old version:

❯ brew install lucasgelfond/zerobrew/zerobrew
...
==> Would install 1 formula:
zerobrew
==> Fetching downloads for: zerobrew
✔︎ Formula zerobrew (0.1.1)
...

❯ zb install jq
==> Installing jq...
==> Resolving dependencies (2 packages)...
    oniguruma 6.9.10
    jq 1.8.2
==> Downloading and installing...

Note: This package can't be installed with zerobrew.
      Error: store corruption: zerobrew prefix "/opt/zerobrew/prefix" (20 bytes) is longer than "/opt/homebrew" (13 bytes). On macOS, Mach-O binaries cannot be expanded in-place, so path-sensitive formulae (e.g. git) will not work. Use a prefix of at most 13 characters, e.g. /opt/zerobrew. Re-init with: zb init <root> /opt/zerobrew (or your chosen short prefix), then reinstall.

      Try installing with Homebrew instead:
      brew install jq

error: store corruption: zerobrew prefix "/opt/zerobrew/prefix" (20 bytes) is longer than "/opt/homebrew" (13 bytes). On macOS, Mach-O binaries cannot be expanded in-place, so path-sensitive formulae (e.g. git) will not work. Use a prefix of at most 13 characters, e.g. /opt/zerobrew. Re-init with: zb init <root> /opt/zerobrew (or your chosen short prefix), then reinstall.