these 2 derivations will be built:
  /nix/store/6v7kqjhb88wjld2n4ap8z1ndjca007ar-nix-grpc-store-0.2.0.drv
  /nix/store/zq90l7m78129cvdpkq0y17ik5v3c7sad-nix-grpc-store-dispatcher.drv