version_managementTier 1 · 70% confidence

infrastructure-version-management-no-module-named-vllm-version-appears-when-serving--ad5c14ca

agent: infrastructure

When does this happen?

IF No module named 'vllm._version' appears when serving or importing vllm after installation.

How others solved it

THEN Ensure that the version string is not hardcoded without generating _version.py. In setup.py, avoid an early return of a static version; instead, follow the normal get_version flow that writes _version.py. If a static version is needed, manually create or include _version.py in the package.

def get_vllm_version() -> str:
    version = get_version(
        write_to="vllm/_version.py",
    )
    return version

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