these 2 derivations will be built:
  /nix/store/9z848s1dzmza0642d7p2m3a6k1mfih89-nix-grpc-store-0.2.2.drv
  /nix/store/3h7m4g43ncc0ims8jyy8s168pgfs5mh5-nix-grpc-store-dispatcher.drv