Hello,

It seems like you are not in the project directory and are trying to run the build command idf.py build

D:\Espressif\frameworks\esp-idf-v5.5.1>idf.py build
Executing action: all (aliases: build)
Running cmake in directory D:\Espressif\frameworks\esp-idf-v5.5.1 \build

This issue has been ...

Hello Steven,

When using ESP-IDF installed by IDF Installer, there is a bundled Python included, to not mess up your environment.

This Python is used in the created environment every time when running the ESP-IDF shortcut.
That is why the warning is there every time because the variable is set in ...

Hello Steve,

PYTHONNOUSERSITE is defined here: https://python.readthedocs.io/en/v2.7.2/using/cmdline.html#envvar-PYTHONNOUSERSITE

From PEP 370 definition:
user site directory
A site directory inside the users’ home directory. A user site directory is specific to a Python version. The path ...

Hello Jorgen,

I have tested your issue on a machine with a clean Windows installation and it looks like there is some trouble with the Universal Windows installer, we will have to investigate a bit more.

To install ESP-IDF v5.2.1 you can use the Offline installer from the installer download page ...

Hello Bert,
Can you please provide the content from the second screen ("Pre-installation system check") of installer?

Also try to run following command:

C:\Users\begi\Espressif\python_env\idf5.1_py3.11_env\Scripts\python.exe -m ensurepip --upgrade --default-pip


and send back the output ...