Yes, it's in https://github.com/systemd/systemd/blob/main/src/boot/efi/secure-boot.c In systemd it's called SBAT_DISTRO SBAT_DISTRO_GENERATION SBAT_DISTRO_SUMMARY SBAT_DISTRO_URL As can be seen in https://github.com/systemd/systemd/blob/main/src/boot/efi/meson.build systemd tries to fill in values from /etc/os-release which doesn't work as we have dummy-release in the build root. ID -> SBAT_DISTRO NAME -> SBAT_DISTRO_SUMMARY BUG_REPORT_URL -> SBAT_DISTRO_URL on TW that would be NAME="openSUSE Tumbleweed" ID="opensuse-tumbleweed" BUG_REPORT_URL="https://bugs.opensuse.org" does it make sense to take that scheme?