--- old/setup-disk.in
+++ new/setup-disk.in
@@ -436,16 +436,17 @@
 
 # install needed programs
 init_progs() {
-	local raidpkg=
+	local raidpkg= fs= fstools="e2fsprogs"
 	[ -n "$USE_RAID" ] && raidpkg="mdadm"
-	case $ROOTFS in
-	ext*) fstools=e2fsprogs; mkfs_args="-q";;
-	xfs) fstools=xfsprogs; mkfs_args="-q";;
-	# we need load btrfs module early to avoid the error message:
-	# 'failed to open /dev/btrfs-control'
-	btrfs) fstools=btrfs-progs; mkfs_args=""; modprobe btrfs;;
-	esac
-	apk add --quiet sfdisk e2fsprogs lvm2 $raidpkg syslinux $fstools $@
+	for fs in $BOOTFS $ROOTFS $VARFS; do
+		case $fs in
+		xfs) fstools="$fstools xfsprogs"; modprobe xfs;;
+		# we need load btrfs module early to avoid the error message:
+		# 'failed to open /dev/btrfs-control'
+		btrfs) fstools="$fstools btrfs-progs"; modprobe btrfs;;
+		esac
+	done
+	apk add --quiet sfdisk lvm2 $raidpkg syslinux $fstools $@
 }
 
 show_disk_info() {
@@ -522,7 +523,7 @@
 
 # set up optional raid and create filesystem on boot device.
 setup_boot_dev() {
-	local disk= bootdev=
+	local disk= bootdev= mkfs_args="-q"
 	local part=$(for disk in $@; do find_boot_partition $disk; done)
 	set -- $part
 	bootdev=$1
@@ -540,7 +541,8 @@
 			--metadata=0.90 --quiet --run $@ $missing || return 1
 		bootdev=/dev/md0
 	fi
-	mkfs.$BOOTFS -q $bootdev
+	[ "$BOOTFS" == "btrfs" ] && mkfs_args=""
+	mkfs.$BOOTFS $mkfs_args $bootdev
 	BOOT_DEV="$bootdev"
 }
 
@@ -730,7 +732,8 @@
 
 # setup
 setup_root() {
-	local root_dev="$1" boot_dev="$2"
+	local root_dev="$1" boot_dev="$2" mkfs_args="-q"
+	[ "$ROOTFS" == "btrfs" ] && mkfs_args=""
 	mkfs.$ROOTFS $mkfs_args "$root_dev"
 	mkdir -p "$SYSROOT"
 	mount -t $ROOTFS $root_dev "$SYSROOT" || return 1
@@ -917,6 +920,12 @@
  -s  Use SWAPSIZE MB instead of autodetecting swap size (Use 0 to disable swap)
  -v  Be more verbose about what is happening
 
+If BOOTFS, ROOTFS, VARFS are specified, then format a partition with specified
+filesystem. If not specified, the default filesystem is ext4.
+Supported filesystems for
+  boot: ext2, ext3, ext4, btrfs
+  root: ext2, ext3, ext4, btrfs, xfs
+   var: ext2, ext3, ext4, btrfs, xfs
 __EOF__
 	exit 1
 }