these 2 derivations will be built:
  /nix/store/im15622ym6zslcsknaq16nw90im8i3jx-nix-grpc-store-0.2.2.drv
  /nix/store/ld6v8bwk0diqm8xbvpcgychk4n6b4l7h-nix-grpc-store-dispatcher.drv