deepseek-ai/deepseek-harness · error · RuntimeError

unsupported DSH_RUNTIME_PLATFORM_TAG {platform_tag!r}; expec

Error message

unsupported DSH_RUNTIME_PLATFORM_TAG {platform_tag!r}; expected one of {supported}

What it means

Error "unsupported DSH_RUNTIME_PLATFORM_TAG {platform_tag!r}; expected one of {supported}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at python/sdk-runtime/hatch_build.py:64

        raise RuntimeError(f"unsupported deepseek-harness-runtime-bin build platform: {key}") from exc


class RuntimeBuildHook(BuildHookInterface):
    """Assign the native wheel tag and reject incomplete or mixed-platform payloads."""

    def initialize(self, version: str, build_data: dict[str, object]) -> None:
        if version == "editable":
            return
        if self.target_name == "sdist":
            raise RuntimeError(
                "deepseek-harness-runtime-bin is wheel-only; build and publish platform wheels only."
            )

        platform_tag = os.environ.get("DSH_RUNTIME_PLATFORM_TAG") or _host_platform_tag()
        matches = [value for value in _PLATFORMS.values() if value[0] == platform_tag]
        if len(matches) != 1:
            supported = ", ".join(value[0] for value in _PLATFORMS.values())
            raise RuntimeError(
                f"unsupported DSH_RUNTIME_PLATFORM_TAG {platform_tag!r}; expected one of {supported}"
            )
        expected_executable = matches[0][1]
        runtime_dir = Path(self.root) / "src" / "deepseek_harness_runtime" / "runtime"
        runtime_files = sorted(runtime_dir.glob("dsh-jsonrpc-agent-pkg-*") if runtime_dir.is_dir() else [])
        expected_files = [expected_executable, f"{expected_executable}-rg"]
        if "-macos-" in expected_executable:
            expected_files.append(f"{expected_executable}-spawn-helper")
        found_files = [path.name for path in runtime_files]
        if found_files != expected_files:
            raise RuntimeError(
                f"runtime wheel {platform_tag} payload must be {expected_files}; found {found_files}"
            )
        for executable in runtime_files:
            if executable.stat().st_mode & stat.S_IXUSR == 0:
                raise RuntimeError(f"runtime executable is not executable: {executable}")
        build_data["pure_python"] = False
        build_data["infer_tag"] = False

View on GitHub (pinned to b150a551b8)

Solutions

1. Set DSH_RUNTIME_PLATFORM_TAG to one of the supported tags listed in the message.

When it happens

Trigger: Thrown at python/sdk-runtime/hatch_build.py:64 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/d0a9efa0ab64ad61. Report an issue: GitHub.