these 2 derivations will be built:
  /nix/store/0l3si1q8dx4w0plwzzblph6gxcf7z8mx-toon-format-0.5.0-vendor.drv
  /nix/store/43x4g7n5s19symwzawsnv13lmh4cpmz6-toon-format-0.5.0.drv