these 2 derivations will be built:
  /nix/store/ib7pg8xwbln3j6s2b7zm246yrqip0hvj-iets-conformance-adapter.drv
  /nix/store/2hqi3xygigb8hh8ry1j73x7mwmz49qib-nix-conformance-iets.drv