these 2 derivations will be built:
  /nix/store/9cvzmwqi0r50cqpnqvwrmn24la0yz9z6-nix-grpc-store-0.2.2.drv
  /nix/store/bvvsirqb3ix1f2qhn9dqfrcifi1mypvq-nix-grpc-store-dispatcher.drv