these 2 derivations will be built:
  /nix/store/ib8xgg3x468fskwdnxb8618afbj6vk9m-nix-grpc-store-0.2.2.drv
  /nix/store/gh32gphwn92l84igblk2p2w2qwq9c5pw-nix-grpc-store-dispatcher.drv