Are the robots we create alive?
But if free will is part of the system and not external, and free will is free and not only a consequence of external inputs, then the system as a whole will exhibit different outputs to the same inputs.
inputs -> system(laws of physics + free will) -> different outputs to the same inputs, but different choices driven by free will
Deterministic systems behave like non-deterministic ones in the presence of free will. You can even strip out the inputs for a contained system, and the system will still give different outputs.