pipreqs gives blank file

Question

I am using SageMaker studio notebook and want to create a requirements.txt.

I tried two options:

1. !pip freeze > requirements.txt

This gives me more than 300 rows of listed dependencies.

2. !pipreqs lib/ This gives me a blank file.

From what I learned, pipreqs seems better to provide all necessary information but not as overwhelmed as pip freeze. However, I am getting a blank file; is anything I am doing here wrong? I am expecting I should at least see openai and pandas in the requirements.txt.

Also, this is what I am getting from session_info.show():

azure               NA
boto3               1.34.33
botocore            1.34.33
openai              0.28.0
pandas              2.2.0
session_info        1.0.0
utils               NA