anchor.diff:            full name will be
             <literal>label-$(date+"%Y%m%d%H%M%S")</literal>. For
             example, by default your backups will look similar to
  -          <literal>nixos-20140301021501</literal>.
  +          <literal>nixos-20140301011501</literal>.
           '';
         };
   
  
positive.code:           service called <literal>tarsnap-backup</literal> which is
            periodically run by cron, or you may run it on-demand.
  
            See <link xlink:href='http://www.tarsnap.com/gettingstarted.html'>Getting Started</link> 
            Tarsnap page.
          '';
        };
  
  
negative.code:         default = "15 01 * * *";
          description = ''
            This option defines (in the format used by cron) when
            tarsnap is run for backups. The default is to backup the
            specified paths at 01:15 at night every day.
          '';
        };
  
  