these 3 derivations will be built:
  /nix/store/k71ln7d8wma10xakxq0lqn1kwk7ivh3r-iets-0.1.0.drv
  /nix/store/xm3bw6k4za5jf0laycbyzczjcgrnf0aw-iets-conformance-adapter.drv
  /nix/store/8v2jzi6hpz9802nsbn563531xz85x5z0-nix-conformance-iets.drv