{ "toolchain":
  { "type": "export"
  , "flexible_config":
    ["ARCH", "TARGET_ARCH", "BUILD_ARCH", "TOOLCHAIN_CONFIG", "ENV"]
  , "fixed_config": {"MUSL_BUILD_STATIC": true}
  , "target": ["@", "gcc-musl", "", "toolchain_internal"]
  }
, "runlibs":
  { "type": "export"
  , "flexible_config": ["ARCH", "TARGET_ARCH", "TOOLCHAIN_CONFIG", "ENV"]
  , "fixed_config": {"MUSL_BUILD_STATIC": true}
  , "target": ["@", "gcc-musl", "", "runlibs_internal"]
  }
}