SCons very slow on GitHub actions

Hello,

I'm suffering from very slow SCons script reading times on Github 
Actions with Windows runners. For an example, see 
https://github.com/LeonarddeR/scons-examples/actions/runs/14706591575/job/41268375471

Things I've tried so far to fix this are:
- Pinned version of Python with the setup-python action, both X86 and X64
- Pinned version of SCons to an older version, e.g. 4.8.1
- Server 2025 image
- Run in a venv with uv
- Cleaning up the path variable, since it is known to be full of garbage 
on GH Actions
- Using a Windows dev drive

There's definitely a variable on Github Actions that kicks us here, but 
apart from the script reading phase, all seems pretty smooth afterwards. 
And not to mention that other runners are going fine.

Kind regards,

Leonard de Ruijter