these 2 derivations will be built:
  /nix/store/s0m9fwj0h7p4iijn1dfdbr95qilrc3fa-rootfs-ubuntu-26_04.tar.drv
  /nix/store/x5a388i2kh6y5kica4cgcwmjyy5grjps-container-test-ubuntu-26-04-empty-config.drv