It's already done once few lines earlier in the Image/Build/iso.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
-e 's#@CMDLINE@#root=/dev/sr0 rootfstype=iso9660 rootwait $(strip $(call Image/cmdline/$(1)) $(BOOTOPTS) $(GRUB_CONSOLE_CMDLINE))#g' \
-e 's#@TIMEOUT@#$(GRUB_TIMEOUT)#g' \
./grub-iso.cfg > $(KDIR)/root.grub/boot/grub/grub.cfg
- $(CP) $(KDIR)/bzImage $(KDIR)/root.grub/boot/vmlinuz
mkisofs -R -b boot/grub/eltorito.img -no-emul-boot -boot-info-table \
-o $(KDIR)/root.iso $(KDIR)/root.grub $(TARGET_DIR)
endef