these 2 derivations will be built:
  /nix/store/dg499vx739rmqswdqk8knblzvw74lzra-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/ab6znrvcczd5awk3prn76rqzswvyl8lk-nix-grpc-store-dispatcher.drv