anchor.diff:        '';
   
         script = (
  -        if cfg.confFile != "" then "${pkg}/bin/cjdroute < ${cfg.confFile}" else
  +        if cfg.confFile != null then "${pkg}/bin/cjdroute < ${cfg.confFile}" else
             ''
               source /etc/cjdns.keys
               echo '${cjdrouteConf}' | sed \
  
positive.code: 
        admin = {
          bind = mkOption {
            type = types.string;
            default = "127.0.0.1:11234";
            description = ''
              Bind the administration port to this address and port.
  
negative.code:       };
  
        confFile = mkOption {
          type = types.nullOr types.path;
          default = null;
          example = "/etc/cjdroute.conf";
          description = ''
            Ignore all other cjdns options and load configuration from this file.
  