sys-kernel/cachyos-kernel: Broken signing

Hey, I've tried using the new ebuilds today and had this: ``` * ERROR: sys-kernel/cachyos-kernel-6.11.7::xarblu-overlay failed (prepare phase): * MODULES_SIGN_KEY=/root/PK.key not found or not readable! * * Call stack: * ebuild.sh, line 136: Called src_prepare * environment, line 3713: Called kernel-build_merge_configs '/var/tmp/portage/sys-kernel/cachyos-kernel-6.11.7/temp/version.config' '/var/tmp/portage/sys-kernel/cachyos-kernel-6.11.7/work/gentoo-kernel-config-g14/base.config' '/var/tmp/portage/sys-kernel/cachyos-kernel-6.11.7/temp/cachy-defaults.config' '/var/tmp/portage/sys-kernel/cachyos-kernel-6.11.7/work/gentoo-kernel-config-g14/no-debug.config' '/var/tmp/portage/sys-kernel/cachyos-kernel-6.11.7/work/gentoo-kernel-config-g14/secureboot.config' * environment, line 2106: Called die * The specific snippet of code: * die "MODULES_SIGN_KEY=${MODULES_SIGN_KEY} not found or not readable!"; ``` which doesn't seem to happen on the old ebuild I was updating locally so I think some commit broke it