these 3 derivations will be built:
  /nix/store/gq120k0hlmjxnb1ddmmd22rh2rjaxpa5-iets-0.1.0.drv
  /nix/store/0js2ffrk3ah64kpri22ywmsgswysxp0k-iets-conformance-adapter.drv
  /nix/store/y32ya1cqwwbsygrgmz0156rvlqsshpcq-nix-conformance-iets.drv