anchor.diff:                  default = true;
                   description = ''
                     Whether to propagate permission changes.
  +                '';
  +              };
  +
  +              ignoreDelete = mkOption {
  +                type = types.bool;
  +                default = false;
  +                description = ''
  +                  Whether to delete files in destination. See <link
  +                  xlink:href="https://docs.syncthing.net/advanced/folder-ignoredelete.html">
  +                  upstream's docs</link>.
                   '';
                 };
   
  
positive.code:                 });
                };
  
  
  
                rescanInterval = mkOption {
                  type = types.int;
                  default = 3600;
  
negative.code:     fsWatcherEnabled = folder.watch;
      fsWatcherDelayS = folder.watchDelay;
      ignorePerms = folder.ignorePerms;
      ignoreDelete = folder.ignoreDelete;
      versioning = folder.versioning;
    }) (filterAttrs (
      _: folder:
  