these 2 derivations will be built:
  /nix/store/ymbqln6vsd35x1kf864zn9m30l6q8qhg-nix-grpc-store-0.2.3.drv
  /nix/store/rwv7qn1la5aj9zbh1lxhd7dih3cdhcdm-nix-grpc-store-dispatcher.drv