anchor.diff:          args.add('--no-background-compilation');
         }
       } else {
  +      args.add('--no-preview-dart-2');
         if (_isStrong) {
           args.add('--strong');
         }
  
positive.code:     }
      if (useDfe) {
        args.add('--preview-dart-2');
      }
      args
        ..addAll(vmOptions)
  
negative.code:     var args = ["--snapshot=$snapshot", "--snapshot-kind=app-jit"];
      if (useDfe) {
        args.add("--preview-dart-2");
      } else {
        args.add("--no-preview-dart-2");
      }
      args.addAll(arguments);
  
  