these 2 derivations will be built:
  /nix/store/4l03n0c3020ipz01l66klh56xbdkb1cs-rootfs-ubuntu-22_04.tar.drv
  /nix/store/v8l1ha3j7vd8v11mhvk0kd8d27ss2bmx-container-test-ubuntu-22-04-example.drv