these 2 derivations will be built:
  /nix/store/y0aq6l1mlz6m4ihdwi368vgixnym46ys-rootfs-ubuntu-26_04.drv
  /nix/store/9dh4zgl7r66b3pzxq2g3b02wfrak5vck-container-test-ubuntu-26-04-example.drv