these 2 derivations will be built:
  /nix/store/ygym7hrflbh4wqn1yh9y6xgf9a1bsjyh-rootfs-ubuntu-26_04.tar.drv
  /nix/store/d5i9w9qg7iqg5x1gh04j1ns20jrqxq5m-container-test-ubuntu-26-04-existing-group-members.drv