these 2 derivations will be built:
  /nix/store/s0m9fwj0h7p4iijn1dfdbr95qilrc3fa-rootfs-ubuntu-26_04.tar.drv
  /nix/store/6mzgzd4vs3xrnfhmca75hqkn1h5adpib-container-test-ubuntu-26-04-existing-group-members.drv