these 2 derivations will be built:
  /nix/store/r4m5g3znwfgyz7yzscjvlwl6dq7bkz90-nix-grpc-store-0.2.3.drv
  /nix/store/mz4qr726mv50mfymkkcfmkyd7s7v8bax-nix-grpc-store-dispatcher.drv