these 2 derivations will be built:
  /nix/store/4l6xzinrzyqzvhbqymdsnia97hy8n7c9-rootfs-ubuntu-24_04.tar.drv
  /nix/store/r9x5jfhviaskn7hz5cayxdckhagg4qhk-container-test-ubuntu-24-04-existing-files.drv