余承澧 (windasd says to YSITD
Cloning https://github.com/maddhatter/Flask-CacheBust.git (to 38d940cc4f18b5fcb5687746294e0360640a107e) to /tmp/pip-build-FHgmTM/flask-cachebust Could not find a tag or branch '38d940cc4f18b5fcb5687746294e0360640a107e', assuming commit.