these 2 derivations will be built:
  /nix/store/yfry41if8kdprfiyfm8fmby59yh9f2b0-rootfs-ubuntu-26_04.tar.drv
  /nix/store/61hxvc6xnwa7kjb5n3qfz7vc6vcj49gw-container-test-ubuntu-26-04-nix-flakes.drv