anchor.diff:            Transmission daemon can be controlled via the RPC interface using
             transmission-remote or the WebUI (http://localhost:9091/ by default).
   
  -          Torrents are downloaded to ${homeDir}/Downloads/ by default and are
  +          Torrents are downloaded to ${downloadDir} by default and are
             accessible to users in the "transmission" group.
           '';
         };
  
positive.code:   homeDir = "/var/lib/transmission";
    downloadDir = "${homeDir}/Downloads";
    incompleteDir = "${homeDir}/.incomplete";
    
    settingsDir = "${homeDir}/.config/transmission-daemon";
    settingsFile = pkgs.writeText "settings.json" (builtins.toJSON fullSettings);
  
  
negative.code:     else toString ''"${x}"'';
  
    # for users in group "transmission" to have access to torrents
    fullSettings = { download-dir = downloadDir; incomplete-dir = incompleteDir; } // cfg.settings // { umask = 2; };
  in
  {
    options = {
  