these 2 derivations will be built:
  /nix/store/sraf4q0spgnr7snfn1iq2virfh01a7va-rootfs-ubuntu-24_04.tar.drv
  /nix/store/lprx8z7z2wpy754nax30vlgy09lpiv7j-container-test-ubuntu-24-04-example.drv