Meteor 3.2

After installing an npm package with Mongo dependencies, Meteor fails with this error:

welkin@Mac issue-top-level-await2 % meteor                                                                   
[[[[[ ~/code/issue-top-level-await2 ]]]]]     

=> Started proxy.                             
=> Started HMR server.                        
=> Errors prevented startup:                  
   
   While building for web.browser:
   node_modules/bson/lib/bson.mjs:239:28: Unexpected reserved word 'await'. (239:28)
   
=> Your application has errors. Waiting for file change.
=> Started MongoDB.

This is a minimal reproducible example.
https://github.com/welkinwong/issue-top-level-await

PS: After resetting everything, the error still persists, so it's unlikely to be cache-related.

meteor reset && rm -rf package-lock.json && rm -rf node_modules && meteor npm i && meteor

The error only occurs when a Meteor package in my /packages directory imports and uses Mongo. This makes me suspect a potential conflict between the two Mongo.

in /packages/abc/

import mongo from 'mongodb';
mongo;

install npm meteor npm i sharedb-mongo
This npm package has a Mongo dependency.

Apologies if my explanation isn't perfect - I'm doing my best to explain this tricky issue. Really appreciate any help!