Installed initrd lacked mmc_block -> can't mount root on eMMC -> no boot. generate-config runs in the RAM installer and misses mmc modules, and it overwrites hardware-configuration.nix, so pin them where they merge instead.
Installed initrd lacked mmc_block -> can't mount root on eMMC -> no boot. generate-config runs in the RAM installer and misses mmc modules, and it overwrites hardware-configuration.nix, so pin them where they merge instead.