these 2 derivations will be built:
  /nix/store/0szy2z7c293d2f96kf106qi77whfc2rm-nix-grpc-store-0.2.3.drv
  /nix/store/hakxgsgb0i6pckz3mjdw03rxwa6k341a-nix-grpc-store-dispatcher.drv