diff --git a/config b/config
index ea318c7..93e72c7 100644
--- a/config
+++ b/config
@@ -12,7 +12,7 @@
 root="UUID=07729c48-25d8-4096-acaf-ce5322915680"
 
 # root type
-#root_type=""
+#root_type="ext4"
 
 # root mount options
 #root_args=""
diff --git a/generate b/generate
index 9a47f67..efb6b95 100755
--- a/generate
+++ b/generate
@@ -124,11 +124,19 @@ install_luks() {
 install_drivers() {
     modker="${moddir}${kernel}"
     if [ "$hostonly" = 1 ]; then
+	[ -n "$root_type" ] || panic "hostonly mode required root_type option to be configured"
 	for modalias in $(find /sys/devices -name modalias -exec sort -u "{}" "+"); do
 	    for driver in $(modprobe -D $modalias 2>/dev/null | cut -d " " -f 2); do
 		install -Dm644 "$driver" "${tmpdir}${driver}"
 	    done
 	done
+
+	for root_driver in $(modprobe -D $root_type 2>/dev/null | cut -d " " -f 2); do
+	    install -Dm644 "$root_driver" "${tmpdir}${root_driver}"
+	done
+
+	# TODO LUKS
+	# TODO LVM
     else
 	find \
 	    "${modker}/kernel/drivers/virtio" \