these 3 derivations will be built:
  /nix/store/kyylp87pd460lj73ffd78p6qh6fay428-iets-0.1.0.drv
  /nix/store/53mamb2vg6i1mhrl8yzbh2vzhsj9k77p-iets-conformance-adapter.drv
  /nix/store/ybwcpy17kplywc2wsijhcy6axs7vrqri-nix-conformance-iets.drv