# `mix backplane.mcp.stdio.build`

Builds the package-owned Linux/macOS POSIX guardian. No ordinary Mix compiler,
application startup or transport activation invokes a compiler.

    mix backplane.mcp.stdio.build
    mix backplane.mcp.stdio.build --output /absolute/package/priv/bin/backplane-mcp-stdio-guardian

CC may select the platform C11 compiler. The output must pass protocol probe 1.

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*Consult [api-reference.md](api-reference.md) for complete listing*