these 2 derivations will be built:
  /nix/store/hmibfi18wl7y8m1hcnh3piilkcznd4vz-nix-grpc-store-0.2.2.drv
  /nix/store/95n9b6614ys8bqzsq8a60z367rpgk5nb-nix-grpc-store-dispatcher.drv