these 6 derivations will be built:
  /nix/store/gh89mfggkjlwvibzybis63x6f7cmhf1h-iets-0.1.0.drv
  /nix/store/g8dngv21agqw5jcv5iq5s4lz8sk61nyi-closure-info.drv
  /nix/store/vpm9vjymafhcjwggnq0pvvh6rmpy12za-test-script.drv
  /nix/store/bjxsm9dz3f6r1lws1k3in7d0gf871906-driverConfiguration.json.drv
  /nix/store/84xj3gw8yxzzh2dsx0wxl2wxs4nfss3a-nixos-test-driver-iets-grpc-e2e.drv
  /nix/store/1zkjn6myvd0x2rlmnj239qk1kxixmhfg-container-test-run-iets-grpc-e2e.drv