THIS IS WIP!

Building your own Unified Kernel Image

To build your own UKI you'll want to first set up a regular runtime sysext, install the kernel+modules there and then rebuild the EFI files.

# Build your kernel as usual but install to your sysext.
make -j$(nproc)
make INSTALL_MOD_PATH="$HOME/kde/usr" modules_install
version=$(make -s kernelrelease)
install -Dm644 "$(make -s image_name)" "$HOME/kde/usr/lib/modules/$version/vmlinuz"
run0 systemd-sysext refresh

# Rebuild the EFI files (based on what is now available in /usr)
run0 _kde-linux-rebuild-efi

# Install the kde-linux UKI. Will show up as unversioned entry in systemd-boot.
run0 cp kde-linux.efi /boot/EFI/Linux/