Old version pip can't install opencv-python

[Vozf]

• OS version and name: Ubuntu
• Poetry version: 1.0.10

Issue

I'm trying to install opencv-python with poetry
poetry add opencv-python
It hangs onn this line
- Installing opencv-python (4.4.0.44)
It succeeds only after pip upgrade
poetry run pip install --upgrade pip
First I had
pip 19.2.3
After upgrade
pip 20.2.3

[abn]

#2666 upgrades the version pip used. However, I suspect the issue here more to do with the large artifacts. The second run might have had it cached.

[github-actions]

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