anchor.diff:        enable = mkOption {
           default = false;
           description = ''
  -          Whether to run the machine as a HTTP proxy server.
  +          Whether to run the prayer webmail http server.
           '';
         };
   
  -      listenAddress = mkOption {
  -        default = "127.0.0.1:8118";
  +      port = mkOption {
  +        default = "2080";
           description = ''
  -          Address the proxy server is listening to.
  -        '';
  -      };
  -
  -      logDir = mkOption {
  -        default = "/var/log/prayer" ;
  -        description = ''
  -          Location for prayer log files.
  +          Port the prayer http server is listening to.
           '';
         };
   
  
positive.code:     prayer_group = "${prayerGroup}"
      sendmail_path = "/var/setuid-wrappers/sendmail"
  
      ${config.services.prayer.extraConfig}
    '';
  
    prayerCfg = pkgs.runCommand "prayer.cf" { } ''
  
negative.code: let
  
    inherit (pkgs) prayer;
  
    cfg = config.services.prayer;
  
    stateDir = "/var/lib/prayer";
  
  