anchor.diff:  
         enable = mkOption {
           default = false;
  +        type = types.bool;
           description = ''
             Enable munin-cron. Takes care of all heavy lifting to collect data from
             nodes and draws graphs to html. Runs munin-update, munin-limits,
  
positive.code:       };
  
        hosts = mkOption {
          example = ''
            [''${config.networking.hostName}]
            address localhost
          '';
          description = ''
            Definitions of hosts of nodes to collect data from. Needs at least one
            host for cron to succeed. See
            <link xlink:href='http://guide.munin-monitoring.org/en/latest/reference/munin.conf.html' />
          '';
        };
  
  
negative.code: 
        extraGlobalConfig = mkOption {
          default = "";
          type = types.lines;
          description = ''
            <filename>munin.conf</filename> extra global configuration.
            See <link xlink:href='http://guide.munin-monitoring.org/en/latest/reference/munin.conf.html' />.
  