The goal is having Home Assistant deployed on a RaspberryPI.
The SD card image build process needs to be repeatable, hence the use of a Nix flake to provide a Yocto development environment in charge of producing the said image. Currently, the idea is to rely on:
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The Yocto environment provided by the community Nix environments.
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This meta-homeassistant Yocto layer maintained on Github.
Additional documentation: