these 2 derivations will be built:
  /nix/store/2cnkp0fkyimawigy6ypdbyl4im3fv93l-nix-grpc-store-0.2.3.drv
  /nix/store/ys7v9gyby9ancg94my0i9157i4p9yn0y-nix-grpc-store-dispatcher.drv