these 3 derivations will be built:
  /nix/store/pizhrrplxkww7n7h063dsv51frnby5kj-iets-0.1.0.drv
  /nix/store/d06m5lqp5jw2hn88qhsqcgfaac0wyh7r-iets-conformance-adapter.drv
  /nix/store/qsqfxafl7qqr9a3c1s74hsszq5d1rm4x-nix-conformance-iets.drv