these 3 derivations will be built:
  /nix/store/ip6m8nizgibzrx70hha5w8f23cgqnpcd-iets-0.1.0.drv
  /nix/store/0hlgzgqkczv5x6p5p689inchl0aqz4jp-iets-conformance-adapter.drv
  /nix/store/b78s53nlyljswz1w75djsa6hvkwn4bh6-nix-conformance-iets.drv