{ "json":
  { "type": "export"
  , "target": "json library"
  , "flexible_config":
    [ "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "ARCH"
    , "CC"
    , "CFLAGS"
    , "CXX"
    , "CXXFLAGS"
    , "DEBUG"
    , "ENV"
    , "HOST_ARCH"
    , "OS"
    , "TARGET_ARCH"
    , "TOOLCHAIN_CONFIG"
    ]
  }
, "json library":
  { "type": ["@", "rules", "CC", "library"]
  , "name": ["nlohmann_json"]
  , "hdrs": ["json headers"]
  }
, "json headers":
  { "type": ["@", "rules", "data", "staged"]
  , "stage": ["nlohmann"]
  , "srcs": [["TREE", null, "."]]
  }
}