these 2 derivations will be built:
  /nix/store/08faaijmxcgvzhsb7yh1vvwnf4l3w8c4-mcptoon-0.8.25.drv
  /nix/store/2f81j0nx9ymh5szbbnm8gsa0w092lbq8-check-mcptoon.drv