grpc-swift: Undefined Symbol Errors

What are you trying to achieve?

Switching to SwiftNIO implementation from gRPC C library

When trying to build I get the following error:

Undefined symbols for architecture x86_64:
  "nominal type descriptor for Network.NWConnection.PendingDataTransferReport", referenced from:
      _symbolic _____ 7Network12NWConnectionC25PendingDataTransferReportC in NIOTransportServices.o
  "nominal type descriptor for Network.NWConnection.EstablishmentReport", referenced from:
      _symbolic _____y_____SgG 3NIO15EventLoopFutureC 7Network12NWConnectionC19EstablishmentReportV in NIOTransportServices.o
      _symbolic _____Sg 7Network12NWConnectionC19EstablishmentReportV in NIOTransportServices.o
  "Network.NWConnection.requestEstablishmentReport(queue: __C.OS_dispatch_queue, completion: (Network.NWConnection.EstablishmentReport?) -> ()) -> ()", referenced from:
      NIOTransportServices.NIOTSConnectionChannel.getOption0<A where A: NIO.ChannelOption>(option: A) throws -> A.Value in NIOTransportServices.o
  "Network.NWConnection.startDataTransferReport() -> Network.NWConnection.PendingDataTransferReport", referenced from:
      NIOTransportServices.NIOTSConnectionChannel.getOption0<A where A: NIO.ChannelOption>(option: A) throws -> A.Value in NIOTransportServices.o
  "type metadata accessor for Network.NWConnection.PendingDataTransferReport", referenced from:
      NIOTransportServices.NIOTSConnectionChannel.getOption0<A where A: NIO.ChannelOption>(option: A) throws -> A.Value in NIOTransportServices.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

What have you tried so far?

change the ios deployment target to 13. Same error The example SpeechToText project compiles and runs

Is this minimum ios target is 13? I couldn’t find that documented anywhere