Huggingface spaces "sklearn" modeule not found even after putting scikit-learn in reuirement.txt

🤗AutoTrain
1

reuirenment.txt
scikit-learn

===== Application Startup at 2023-08-13 11:37:33 =====

Traceback (most recent call last):
  File "/home/user/app/app.py", line 15, in <module>
    from sklearn.preprocessing import StandardScaler
ModuleNotFoundError: No module named 'sklearn'