these 2 derivations will be built:
  /nix/store/qk73raay7caf7dvm75ay320pzy7zzk9c-rootfs-ubuntu-26_04.tar.drv
  /nix/store/39iszw5dwb8qi7qrdkqnfx6xr83j2ck8-container-test-ubuntu-26-04-existing-group-members.drv