these 2 derivations will be built:
  /nix/store/39drjpy02cd0z2b7dvn8fl8rqkmkzgd0-rootfs-ubuntu-26_04.tar.drv
  /nix/store/wmgx3j6v89qg8xgan0hc3zi393nc9wsq-container-test-ubuntu-26-04-existing-group-members.drv