--- a/gen_determineargs.sh
+++ b/gen_determineargs.sh
@@ -1170,6 +1170,14 @@ determine_real_args() {
 		fi
 	fi
 
+	if isTrue "${INTEGRATED_INITRAMFS}"
+	then
+		if  ! isTrue "${BUILD_KERNEL}" || ! isTrue "${BUILD_RAMDISK}"
+		then
+			gen_die "Invalid action specified: --integrated-initramfs option requires action \"all\", i.e. building of kernel and initramfs at the same time!"
+		fi
+	fi
+
 	if ! isTrue "${CMD_INSTALL}"
 	then
 		if [ -n "${KERNEL_MODULES_PREFIX}" ]
--- a/gen_funcs.sh
+++ b/gen_funcs.sh
@@ -2033,7 +2033,7 @@ kconfig_set_opt() {
 	else
 		print_info 3 "$(get_indent ${indentlevel}) - Setting option '${optname}' to '${optval}' in '${kconfig}'..."
 		sed -i "${kconfig}" \
-			-e "s/^#\? \?${optname}[ =].*/${optname}=${optval}/g" \
+			-e "s|^#\? \?${optname}[ =].*|${optname}=${optval}|g" \
 			|| gen_die "Failed to set '${optname}=${optval}' in '${kconfig}'"
 
 		[ ! -f "${KCONFIG_MODIFIED_MARKER}" ] && touch "${KCONFIG_MODIFIED_MARKER}"