You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

enhanced-synapse-s3-provider
1.1.21

This version was deleted from PyPI around 2025-02-19. Installing fails with:
$ pip3 install enhanced-synapse-s3-provider==1.1.21 ERROR: Could not find a version that satisfies the requirement enhanced-synapse-s3-provider==1.1.21
View other deleted versions of enhanced-synapse-s3-provider

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-02-18/ \ enhanced-synapse-s3-provider==1.1.21
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Or, download files manually

And install manually via pip:
enhanced_synapse_s3_provider-1.1.21-py3-none-any.whl (13.6KB)
enhanced_synapse_s3_provider-1.1.21.tar.gz (13.3KB)