these 2 derivations will be built:
  /nix/store/k0y4k3f6sjk9jjxmpqadf3s5xyryzib6-zat-0.5.4-vendor.drv
  /nix/store/xkcg2adf9v6m9j3fk5f7pdxywac2s4g1-zat-0.5.4.drv