these 2 derivations will be built:
  /nix/store/bqqvpsknn3ha5r9hs4yva0c31mljf92s-nix-grpc-store-0.2.3.drv
  /nix/store/nyimb0c4fhp4ynx0366yzws36b9cj720-nix-grpc-store-dispatcher.drv