these 2 derivations will be built:
  /nix/store/mih00vr9chr5hdzc3j01imjlw30bj5hl-nix-grpc-store-0.1.0.drv
  /nix/store/xcfnny6fnqna4zfd0g06ycvml1zfjalp-nix-grpc-store-dispatcher.drv