The code below produces the error "$match with $text is only allowed as the first pipeline stage", even though $match with $text is the only pipeline stage. Is there a subtle syntax error somewhere, or what else might be going on?

const collectionChangeStream = collection.watch([
  { $match: { $text: { $search: 'cake' } } },
]);

collectionChangeStream.on('change', next => {
  console.log(next);
});