these 2 derivations will be built:
  /nix/store/kk4kqy7475dv7palrvp3jghvb2p9gfap-mcptoon-0.8.25.drv
  /nix/store/r4zxhqgx9xd0xb6wfixcc3dzn43s6zv5-check-mcptoon.drv