Busboy Content-Type header is present but still getting an error saying missing Content-Type

Question

I am using netlify functions to make an API. When the user submits multipart/form-data, I need to parse that data using busboy.

But when I do this:

const busboy = new Busboy({headers: event.headers})

I get an error saying missing content type. But if I console.log event.headers, content-type: multipart/form-data;boundary=...... is present.

What should I do to fix it. I am using netlify-lambda serve to serve the functions locally