// Also unwind any aliases defined in included files.
    unwind_var<string_map> unwalias(aliases);

        read_options(fl, runscript);

        this->read_options(fl, runscript, false);

    std::map<std::string, std::string> aliases;

    typedef std::map<std::string, std::string> string_map;
    string_map               aliases;