image boot.vfat { vfat { files = { "bcm2711-rpi-cm4.dtb", "custom/cmdline.txt", "rpi-firmware/config.txt", "rpi-firmware/fixup4.dat", "rpi-firmware/start4.elf", "rpi-firmware/overlays", "u-boot.bin", "boot.scr" } } size = 256M }