anchor.diff:        wantedBy = [ "multi-user.target" ];
         after = [ "network.target" ];
   
  -      preStart = if cfg.confFile != "" then "" else ''
  +      preStart = if cfg.confFile != null then "" else ''
           [ -e /etc/cjdns.keys ] && source /etc/cjdns.keys
   
           if [ -z "$CJDNS_PRIVATE_KEY" ]; then
  
positive.code: 
        UDPInterface = {
          bind = mkOption {
            type = types.string;
            default = "";
            example = "192.168.1.32:43211";
            description = ''
  
negative.code:       '';
  
        script = (
          if cfg.confFile != null then "${pkg}/bin/cjdroute < ${cfg.confFile}" else
            ''
              source /etc/cjdns.keys
              echo '${cjdrouteConf}' | sed \
  