these 2 derivations will be built:
  /nix/store/3mgbf80nn3ax131cwnjjigbjk9vlfhmc-iets-conformance-adapter.drv
  /nix/store/mhd93byhqklcgq5kn9mmksy1ypnb74gd-nix-conformance-iets.drv
building '/nix/store/3mgbf80nn3ax131cwnjjigbjk9vlfhmc-iets-conformance-adapter.drv'
iets-conformance-adapter> structuredAttrs is enabled
building '/nix/store/mhd93byhqklcgq5kn9mmksy1ypnb74gd-nix-conformance-iets.drv'