these 2 derivations will be built:
  /nix/store/nl429z523wc8jbczq0p5c4fgj6sbl030-nix-grpc-store-0.2.1.drv
  /nix/store/mnkgdg7bbr6wggxrsnvbd6ds28jsn62z-nix-grpc-store-dispatcher.drv