Use Nix to setup the Python environment of SDK

[otavio]

In an internal project, we use Nix for the development environment but until now we still use Docker for the SDK inside the CI. We'd like to use the same environment on CI but due to how the venv activation works, it fails.

Is it possible to get the Python environment of SDK in Nix?

[katyo]

@otavio Good idea but note that some python dependencies still lacks in NixOS repo. In any case we should instantiate environment from requirements.txt which contained in Zephyr. Currently I don't know an easy nix-based way to do it.

[otavio]

I know two options:

• https://github.com/nix-community/dream2nix/
• https://github.com/DavHau/mach-nix

[otavio]

Did you evaluate any of those options?

[otavio]

Fixed in #8