these 3 derivations will be built:
  /nix/store/s48b2k0bjz4p6zw0hnhs71jhgpigb9x0-iets-0.1.0.drv
  /nix/store/zpxslr3ichmhqx0hqpjpg3gp47rr0yi8-iets-conformance-adapter.drv
  /nix/store/6wsag9zc6i3az9viyhh7785plxl6c1qi-nix-conformance-iets.drv