@Matthieu_TPops, The reason why simulator works is that we’ve disabled the NNPACK for the simulator build. You can definitely rebuild your pod via the custom build script, please refer to the tutorial here - https://pytorch.org/mobile/ios/#build-pytorch-ios-libraries-from-source 14. As for the model, you don’t need to trace it again. but one thing to keep in mind is that if you build your pod from master, you need to also use the pytorch master code to trace the model. Otherwise, you might run into some backward compatibility issues.