these 3 derivations will be built:
  /nix/store/gx6r94x03a7r9n1h3l24fdhksxw4klkw-toon-format-0.7.0-vendor.drv
  /nix/store/3zr9dppnrm1n3hda4rajjyb7h0jvy99h-toon-format-0.7.0.drv
  /nix/store/ph6b0b5p8q4ig4l5pmr46nvg528ijl5r-check-toon.drv