these 3 derivations will be built:
  /nix/store/hcb8hby383wfk97v2h63gxrpskvacjim-iets-0.1.0.drv
  /nix/store/9rir9ri2hbfl9pn414as2x7m82vgpnv1-iets-conformance-adapter.drv
  /nix/store/9rwanwjv29xf7b9z7kb7j77n540cqysj-nix-conformance-iets.drv