these 3 derivations will be built:
  /nix/store/byap5aclh821l4ncrxlm2lhg4739fbwn-source.drv
  /nix/store/ba9v6cr7hiwiba4l9i7h62xm9zjcc15d-mcptoon-0.8.34.drv
  /nix/store/zkgv7xwyz7rd2fjd8v3qpdkvyyn5f6yi-check-mcptoon.drv