these 2 derivations will be built:
  /nix/store/g9ffsv3wccpr7ff3d4y30j0adpfv3z9k-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/irj460p1730s96qajdxxza8082kwlbiy-nix-grpc-store-dispatcher.drv