these 3 derivations will be built:
  /nix/store/2366l5h31cd4jrrrgb6aapi1fc8h4zz1-toon-format-0.5.0-vendor.drv
  /nix/store/96jy8jb1jz4v1bn41g8pxg3zg2harzh8-toon-format-0.5.0.drv
  /nix/store/nmnkr7psp27s07612sy3rjznn729wryh-check-toon.drv