these 2 derivations will be built:
  /nix/store/77lmgbh7a39b228d356l6w0kzrhhn9s5-nix-grpc-store-0.2.3.drv
  /nix/store/50i2ljskbpbih7bsg6bipf5jsw6xb35d-nix-grpc-store-dispatcher.drv