these 3 derivations will be built:
  /nix/store/zd2q42ckj74gxavr68n5x85vb3q4ys09-iets-0.1.0.drv
  /nix/store/c78as91fzjmhnxg5pcv4nx5b802a9j20-iets-conformance-adapter.drv
  /nix/store/q922hway1gg4xynabfld1lsg39lyyp1g-nix-conformance-iets.drv