Python function not finding packages

I can’t seem to be able to get my packages installed when doing doctl serverless deploy. I have followed this guide And also tried whats been suggested in this community question

Here is my build.sh

#!/bin/bash
set -e
virtualenv --without-pip virtualenv
pip install -r requirements.txt --target virtualenv/lib/python3.11/site-packages

I have tried with several different packages and still no luck. Example requirements.txt

yfinance==0.2.40

I have also tried with and without --remote-build flag but nothing works. I just get:

stderr: Invalid function: No module named 'yfinance'

I’m using a .include file if this is in any way relevant. Would really appreciate getting a hand here 'cause I’m about to give up on the whole functions thing.