-./scripts/config/conf -D tmp/.diffconfig.head -w tmp/.diffconfig.stage1 Config.in >/dev/null
-./scripts/kconfig.pl '>' tmp/.diffconfig.stage1 .config >> tmp/.diffconfig.head
-./scripts/config/conf -D tmp/.diffconfig.head -w tmp/.diffconfig.stage2 Config.in >/dev/null
+grep '^CONFIG_ALL=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_ALL_KMODS=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_DEVEL=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_TOOLCHAINOPTS=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_BUSYBOX_CUSTOM=y' .config >> tmp/.diffconfig.head
+./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage1 Config.in >/dev/null
+./scripts/kconfig.pl '>+' tmp/.diffconfig.stage1 .config >> tmp/.diffconfig.head
+./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage2 Config.in >/dev/null