these 2 derivations will be built:
  /nix/store/2a20qblk0hnsnq6vq8y8hj9nrk2i62qk-iets-conformance-adapter.drv
  /nix/store/4kzzzsy2pp0i3g1lv71yzk1m5320mxbv-nix-conformance-iets.drv