+ mkdir -p "${BUILD_OUTPUT}/boot/grub"
+ cp -a /usr/lib/grub/*-pc/*.mod "${BUILD_OUTPUT}/boot/grub"
+ cp -a /usr/lib/grub/*-pc/*.o "${BUILD_OUTPUT}/boot/grub"
+ cp -a /usr/lib/grub/*-pc/*.lst "${BUILD_OUTPUT}/boot/grub"
+ cp -a /usr/share/grub/ascii.pf2 "${BUILD_OUTPUT}/boot/grub"
+ /usr/bin/grub-mkimage -d /usr/lib/grub/*-pc -o \
+ "${BUILD_OUTPUT}/boot/grub/core.img" biosdisk iso9660 --format=i386-pc