Fail to run model on CPU using IPEX-XPU installation

[shira-g]

We want to use speculative decoding where one model runs on the xpu and another model (significantly smaller) runs on the cpu.
We installed xpu build and run the script from https://github.com/intel/intel-extension-for-pytorch/tree/release/2.6/examples/cpu/llm/inference :

python run.py --benchmark -m microsoft/Phi-3-mini-4k-instruct --input-tokens 1024 --max-new-tokens 128 --token-latency --dtype float32 --ipex

And we get the following error:

Traceback (most recent call last):
File "C:\Users\sdp\shira\single_instance\run_generation.py", line 301, in
model = ipex.llm.optimize(
^^^^^^^^^^^^^^^^^^
File "C:\Users\sdp\miniforge3\envs\shira-ipex\Lib\site-packages\intel_extension_for_pytorch\transformers\optimize.py", line 2157, in optimize
validate_device_avaliable(device)
File "C:\Users\sdp\miniforge3\envs\shira-ipex\Lib\site-packages\intel_extension_for_pytorch\transformers\optimize.py", line 1918, in validate_device_avaliable
error_message(device)
File "C:\Users\sdp\miniforge3\envs\shira-ipex\Lib\site-packages\intel_extension_for_pytorch\transformers\optimize.py", line 1909, in error_message
raise RuntimeError(
RuntimeError: Device [cpu] is not avaliable in your IPEX package, need to re-install IPEX with [cpu] support, exiting...
LLM RUNTIME ERROR: Running generation task failed. Quit.

Can we get support for CPU using XPU build?