Build scripts:
https://seafile.servator.de/nas/zyxel/build/debian-nas-20240710.zip
Image for Zyxel NAS520/NAS540/NAS542 with Kernel 6.1.96, Debian 12 and OMV 7.4:
https://seafile.servator.de/nas/zyxel/images/debian-nas-bookworm-24.193-armhf.img.gz
Image for Zyxel NAS520/NAS540/NAS542 with Kernel 6.1.96, Debian 11 and OMV 6.9:
https://seafile.servator.de/nas/zyxel/images/debian-nas-bullseye-24.193-armhf.img.gz