these 3 derivations will be built:
  /nix/store/i7h59lib7xh1gr3bi7gcrq3yhzkilbqq-source.drv
  /nix/store/mm75imnh22h4fnj4c0qd4gskrdlfp8wd-spec-kit-1.2.0.drv
  /nix/store/rmmw892r1hc8lv4gsaj9bmxd0r09k08y-check-spec-kit.drv