these 2 derivations will be built:
  /nix/store/z35hxsn1ql44kcsybiba173iz1v5rksx-rootfs-ubuntu-26_04.tar.drv
  /nix/store/mfpbyfng43i59rqf057zn9jmnx3mj7wf-container-test-ubuntu-26-04-masked-units.drv