Fix CalledProcessError

✅ Solution

CalledProcessError in vllm often arises from CUDA compilation issues during installation or when specific features like FlashInfer with FP8 are used, indicating incompatibility or errors during the CUDA code build process. Resolve this by ensuring your CUDA toolkit version is compatible with vllm and the feature you're using (check vllm's documentation for supported versions), and by carefully reviewing the error message for specific compilation failures and addressing underlying code or environment issues. Consider using a pre-built vllm package to avoid local compilation or trying a different, compatible CUDA version.