these 2 derivations will be built:
  /nix/store/13pi8rw11f48p6hsyrvgsqfrj0h5rksx-toon-format-0.5.0-vendor.drv
  /nix/store/5iz1p8lbw6lhf7kdiayh8nr1sf7znfmm-toon-format-0.5.0.drv