these 3 derivations will be built:
  /nix/store/6drmmzjiigdni73vyxm8yk8vl1v0d34b-source.drv
  /nix/store/4hz37320i1ggcv5kfk6qsjmnydv87n1b-spec-kit-1.0.13.drv
  /nix/store/gv8qgqw6pbiql00cxwfgxvrhgzssvmxb-check-spec-kit.drv