these 2 derivations will be built:
  /nix/store/62ffjicjfbvyhrjf8rnb85cj9xg3049i-nix-grpc-store-0.2.3.drv
  /nix/store/419s4nvrv68k1a2llbsiggq39anfj7ml-nix-grpc-store-dispatcher.drv