these 2 derivations will be built:
  /nix/store/6nh15pf1c7idgww66sldpcw1bj8l86ab-iets-conformance-adapter.drv
  /nix/store/8b6yqjwi6r48b06vl4rb86qxs5qcf6sq-nix-conformance-iets.drv
building '/nix/store/6nh15pf1c7idgww66sldpcw1bj8l86ab-iets-conformance-adapter.drv'
iets-conformance-adapter> structuredAttrs is enabled
building '/nix/store/8b6yqjwi6r48b06vl4rb86qxs5qcf6sq-nix-conformance-iets.drv'