these 3 derivations will be built:
  /nix/store/vh86bpn4asgwlzc467wdicarlwwyjj48-iets-0.2.0.drv
  /nix/store/64ak0wqxwqsly8nnw74vnalfnn9mmhz4-iets-conformance-adapter.drv
  /nix/store/9k20zdfs7ryjs9n5my0qf1x78f6v60ll-nix-conformance-iets.drv