To allow continuously importing changes from the upstream kernel config (currently arch linux) all changes made by the Eupnea team are stored as individual overlay configs that are appended to the base config.
A daily workflow pulls the fresh upstream config into base-kernel.conf , appends the overlay configs (from
kernel-conf-overlays) and runs make olddefconfig to automatically combine the configs (the appended config options are
prioritized over the base config options) to create combined-kernel.conf which can then used to build the kernel.