if PAYLOAD_GRUB2 choice prompt "GRUB2 version" default GRUB2_MASTER config GRUB2_MASTER bool "HEAD" help Newest GRUB2 version endchoice config GRUB2_EXTRA_MODULES string "Extra modules to include in GRUB image" help Space-separated list of additional modules to include. Few common ones: * bsd for *BSD * png/jpg for PNG/JPG images * gfxmenu for graphical menus (you'll need a theme as well) * gfxterm_background for setting background config PAYLOAD_FILE default "payloads/external/GRUB2/grub2/build/default_payload.elf" endif