def METHOD_NAME(self):
    self.install_path = '${ARCHDIR_RUBY}'
    self.uselib = self.to_list(getattr(self, 'uselib', ''))
    if not 'RUBY' in self.uselib:
        self.uselib.append('RUBY')
    if not 'RUBYEXT' in self.uselib:
        self.uselib.append('RUBYEXT')