No module named 'sklearn' #97

Hello,

Despite having sklearn installed:

=> => # Downloading sklearn-0.0.post1.tar.gz (3.6 kB)
=> => # Preparing metadata (setup.py): started
=> => # Preparing metadata (setup.py): finished with status 'done'
=> => # Collecting scipy
=> => # Downloading https://d1yxz45j0ypngg.cloudfront.net/scipy-1.8.1-nogil39-nogil_39b_x86_64_linux_gnu-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (110
=> => # .5 MB)

I observe the following issue when I try to run my docker image:

Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/flask/cli.py", line 218, in locate_app
import(module_name)
...
from sklearn.cluster import KMeans
ModuleNotFoundError: No module named 'sklearn'

Could it be because I am using flask?