How to install pyclipper on V9 on Windows?

I am struggling to install pyclipper on V9.0.1 on Windows 11.
Most Internet links are several years old.

it should work like this:
open a command prompt shell (probably as Admin) and digit

cd %ProgramFiles%/KiCad/bin
python -m pip install pyclipper

Thanks, as Administrator, this worked:

cd /Program Files/KiCad/9.0/bin
python -m pip install pyclipper

After a “Testing” lite upgrade to todays build, pyclipper is missing again.
Why isn’t this sticky?

probably the update is cleaning python directories and modules