The issue seems to come from the underlying scantree package that dirhash uses.
(see the trace screenshot below)
The posix package cannot be installed on Windows Python distribution.
See: https://docs.python.org/3.8/library/posix.html

This script used to work and I have not updated the dirhash package.
Does anyone have an idea of what is causing this issue?

Note: I’m using Python 3.8.10 on Windows 1O enterprise.