these 3 derivations will be built:
  /nix/store/v1xg10mgk73450vqr2jjn3qf2gvx0cmy-toon-format-0.5.0-vendor.drv
  /nix/store/9pv4jzg2gps6w4fxlgd3iq1mixh1pwyh-toon-format-0.5.0.drv
  /nix/store/d9asxw0nv66snw9bpwq9v5il68r6akz5-check-toon.drv