these 3 derivations will be built:
  /nix/store/2f3bwfibvcms44jmf277ny17xscx9fqx-iets-0.1.0.drv
  /nix/store/ra54zpwg2732slsvl5mjfz4ms9brc303-iets-conformance-adapter.drv
  /nix/store/xd5dj418mmy7wm73dh253klrzdl8yh4m-nix-conformance-iets.drv