these 3 derivations will be built:
  /nix/store/qf0nirwckmafbj78y5fmfsqfi0algmwa-iets-0.1.0.drv
  /nix/store/3abj1rn5cycjvncnwbwlg0wyc2q9qz3r-iets-conformance-adapter.drv
  /nix/store/8lksvf6dqhjhqckwrrykaiadjacpgcqh-nix-conformance-iets.drv