anchor.diff:            '';
           };
           replication = {
  -          enable = mkOption {
  -            default = false;
  -            description = ''
  -              Whether to enable XtreemFS DIR replication plugin.
  -            '';
  -          };
  +          enable = mkEnableOption "XtreemFS DIR replication plugin";
             extraConfig = mkOption {
               example = ''
                 # participants of the replication including this replica
  
positive.code:           '';
          };
          replication = {
            enable = mkOption {
              default = false;
              description = ''
                Whether to enable XtreemFS MRC replication plugin.
              '';
            };
            extraConfig = mkOption {
              example = ''
                # participants of the replication including this replica
  
negative.code: 
      services.xtreemfs = {
  
        enable = mkEnableOption "XtreemFS";
  
        homeDir = mkOption {
          default = "/var/lib/xtreemfs";
  