these 2 derivations will be built:
  /nix/store/z35hxsn1ql44kcsybiba173iz1v5rksx-rootfs-ubuntu-26_04.tar.drv
  /nix/store/ha3jfx30x8dsy415911akqynq8slrb29-container-test-ubuntu-26-04-existing-group-members.drv