for name := range allScopes {
			keys = append(keys, name)
		}
		keys = append(keys, OverrideScopeName)
		sort.Strings(keys)
		s := strings.Join(keys, ", ")

		stringVar(&o.outputLevels, "log_output_level", o.outputLevels,
			fmt.Sprintf("Comma-separated minimum per-scope logging level of messages to output, in the form of "+
				"<scope>:<level>,<scope>:<level>,... where scope can be one of [%s] and level can be one of %s",