these 3 derivations will be built:
  /nix/store/vljpn4d2bmx5hx2i40b16f2wf2c6z68w-iets-0.1.0.drv
  /nix/store/qqik5y20fy6h2v5s4i5n1ybjbmclbcq7-iets-conformance-adapter.drv
  /nix/store/nbgdzn61kbswlq0m7xddrncnfwqr7j34-nix-conformance-iets.drv