diff --git a/board/alix/INIT b/layer/bsp-alix/INIT
similarity index 100%
rename from board/alix/INIT
rename to layer/bsp-alix/INIT
diff --git a/board/alix/LDPATH b/layer/bsp-alix/LDPATH
similarity index 100%
rename from board/alix/LDPATH
rename to layer/bsp-alix/LDPATH
diff --git a/board/alix/ROOTFS b/layer/bsp-alix/ROOTFS
similarity index 100%
rename from board/alix/ROOTFS
rename to layer/bsp-alix/ROOTFS
diff --git a/board/alix/TOOLCHAIN b/layer/bsp-alix/TOOLCHAIN
similarity index 88%
rename from board/alix/TOOLCHAIN
rename to layer/bsp-alix/TOOLCHAIN
index d9cb229..698e0a3 100644
--- a/board/alix/TOOLCHAIN
+++ b/layer/bsp-alix/TOOLCHAIN
@@ -1,3 +1,4 @@
+RELEASEPKG="release-alix"
 TARGET="i686-linux-musl"
 GCC_CPU="i686"
 MUSL_CPU="i386"
diff --git a/board/alix/ifrename b/layer/bsp-alix/ifrename
similarity index 100%
rename from board/alix/ifrename
rename to layer/bsp-alix/ifrename
diff --git a/board/alix/linux.config b/layer/bsp-alix/linux.config
similarity index 100%
rename from board/alix/linux.config
rename to layer/bsp-alix/linux.config
diff --git a/board/rpi3/INIT b/layer/bsp-rpi3/INIT
similarity index 100%
rename from board/rpi3/INIT
rename to layer/bsp-rpi3/INIT
diff --git a/board/rpi3/LDPATH b/layer/bsp-rpi3/LDPATH
similarity index 100%
rename from board/rpi3/LDPATH
rename to layer/bsp-rpi3/LDPATH
diff --git a/board/rpi3/ROOTFS b/layer/bsp-rpi3/ROOTFS
similarity index 100%
rename from board/rpi3/ROOTFS
rename to layer/bsp-rpi3/ROOTFS
diff --git a/board/rpi3/TOOLCHAIN b/layer/bsp-rpi3/TOOLCHAIN
similarity index 88%
rename from board/rpi3/TOOLCHAIN
rename to layer/bsp-rpi3/TOOLCHAIN
index 79d40a5..6af48d9 100644
--- a/board/rpi3/TOOLCHAIN
+++ b/layer/bsp-rpi3/TOOLCHAIN
@@ -1,3 +1,4 @@
+RELEASEPKG="release-rpi3"
 TARGET="arm-linux-musleabihf"
 GCC_CPU="armv6"
 MUSL_CPU="arm"
diff --git a/board/rpi3/ifrename b/layer/bsp-rpi3/ifrename
similarity index 100%
rename from board/rpi3/ifrename
rename to layer/bsp-rpi3/ifrename
diff --git a/board/rpi3/linux.config b/layer/bsp-rpi3/linux.config
similarity index 100%
rename from board/rpi3/linux.config
rename to layer/bsp-rpi3/linux.config
diff --git a/product/router/alix/INIT b/layer/router-alix/INIT
similarity index 100%
rename from product/router/alix/INIT
rename to layer/router-alix/INIT
diff --git a/product/router/alix/dnsmasq.conf b/layer/router-alix/dnsmasq.conf
similarity index 100%
rename from product/router/alix/dnsmasq.conf
rename to layer/router-alix/dnsmasq.conf
diff --git a/product/router/alix/interfaces/port0 b/layer/router-alix/interfaces/port0
similarity index 100%
rename from product/router/alix/interfaces/port0
rename to layer/router-alix/interfaces/port0
diff --git a/product/router/alix/interfaces/port1 b/layer/router-alix/interfaces/port1
similarity index 100%
rename from product/router/alix/interfaces/port1
rename to layer/router-alix/interfaces/port1
diff --git a/product/router/alix/nftables.rules b/layer/router-alix/nftables.rules
similarity index 100%
rename from product/router/alix/nftables.rules
rename to layer/router-alix/nftables.rules
diff --git a/product/router/INIT b/layer/router-base/INIT
similarity index 100%
rename from product/router/INIT
rename to layer/router-base/INIT
diff --git a/product/router/ROOTFS b/layer/router-base/ROOTFS
similarity index 100%
rename from product/router/ROOTFS
rename to layer/router-base/ROOTFS
diff --git a/product/router/dhcpcd.conf b/layer/router-base/dhcpcd.conf
similarity index 100%
rename from product/router/dhcpcd.conf
rename to layer/router-base/dhcpcd.conf
diff --git a/product/router/resolv.conf b/layer/router-base/resolv.conf
similarity index 100%
rename from product/router/resolv.conf
rename to layer/router-base/resolv.conf
diff --git a/product/router/sshd_config b/layer/router-base/sshd_config
similarity index 100%
rename from product/router/sshd_config
rename to layer/router-base/sshd_config
diff --git a/product/router/sysctl.conf b/layer/router-base/sysctl.conf
similarity index 100%
rename from product/router/sysctl.conf
rename to layer/router-base/sysctl.conf
diff --git a/product/router/unbound.conf b/layer/router-base/unbound.conf
similarity index 100%
rename from product/router/unbound.conf
rename to layer/router-base/unbound.conf
diff --git a/product/router/rpi3/INIT b/layer/router-rpi3/INIT
similarity index 100%
rename from product/router/rpi3/INIT
rename to layer/router-rpi3/INIT
diff --git a/product/router/rpi3/dnsmasq.conf b/layer/router-rpi3/dnsmasq.conf
similarity index 100%
rename from product/router/rpi3/dnsmasq.conf
rename to layer/router-rpi3/dnsmasq.conf
diff --git a/product/router/rpi3/hostapd.conf b/layer/router-rpi3/hostapd.conf
similarity index 100%
rename from product/router/rpi3/hostapd.conf
rename to layer/router-rpi3/hostapd.conf
diff --git a/product/router/rpi3/interfaces/wlan0 b/layer/router-rpi3/interfaces/wlan0
similarity index 100%
rename from product/router/rpi3/interfaces/wlan0
rename to layer/router-rpi3/interfaces/wlan0
diff --git a/product/router/rpi3/nftables.rules b/layer/router-rpi3/nftables.rules
similarity index 100%
rename from product/router/rpi3/nftables.rules
rename to layer/router-rpi3/nftables.rules
diff --git a/mk.sh b/mk.sh
index 0246ad3..85598eb 100755
--- a/mk.sh
+++ b/mk.sh
@@ -2,49 +2,33 @@
 
 set -e
 
-if [ ! $# -eq 2 ]; then
-	echo "usage: $0 <board> <product>"
+if [ ! $# -eq 1 ]; then
+	echo "usage: $0 <product>"
 	exit 1
 fi
 
-BOARD="$1"
-PRODUCT="$2"
+PRODUCT="$1"
 
 ################################ basic setup ################################
 BUILDROOT=$(pwd)
 SCRIPTDIR=$(cd $(dirname "${BASH_SOURCE[0]}") && pwd)
 NUMJOBS=$(grep -e "^processor" /proc/cpuinfo | wc -l)
-HOSTTUPLE=$($SCRIPTDIR/util/config.guess)
 
-if [ ! -d "$SCRIPTDIR/product/$PRODUCT" ]; then
-	echo "No configuration for this product: $PRODUCT"
+LAYERCONF="$SCRIPTDIR/product/${PRODUCT}.layers"
+
+if [ ! -f "$LAYERCONF" ]; then
+	echo "Cannot find layer configuration for $PRODUCT"
 	exit 1
 fi
 
-if [ ! -d "$SCRIPTDIR/board/$BOARD" ]; then
-	echo "No configuration for this board: $BOARD"
-	exit 1
-fi
-
-if [ -e "$SCRIPTDIR/product/$PRODUCT/BOARDS" ]; then
-	if ! grep -q "$BOARD" "$SCRIPTDIR/product/$PRODUCT/BOARDS"; then
-		echo "Error, $PRODUCT cannot be built for $BOARD"
-		exit 1
-	fi
-fi
-
-TCDIR="$BUILDROOT/${BOARD}-${PRODUCT}/toolchain"
-PKGBUILDDIR="$BUILDROOT/${BOARD}-${PRODUCT}/build"
 PKGSRCDIR="$BUILDROOT/src"
-PKGDEPLOYDIR="$BUILDROOT/${BOARD}-${PRODUCT}/deploy"
-PKGLOGDIR="$BUILDROOT/${BOARD}-${PRODUCT}/log"
 PKGDOWNLOADDIR="$BUILDROOT/download"
-PACKAGELIST="$BUILDROOT/${BOARD}-${PRODUCT}/pkglist"
+PKGBUILDDIR="$BUILDROOT/$PRODUCT/build"
+PKGDEPLOYDIR="$BUILDROOT/$PRODUCT/deploy"
+PKGLOGDIR="$BUILDROOT/$PRODUCT/log"
+PACKAGELIST="$BUILDROOT/$PRODUCT/pkglist"
 
-mkdir -p "$PKGDOWNLOADDIR" "$PKGSRCDIR" "$PKGLOGDIR"
-mkdir -p "$PKGDEPLOYDIR" "$TCDIR/bin"
-
-export PATH="$TCDIR/bin:$PATH"
+mkdir -p "$PKGDOWNLOADDIR" "$PKGSRCDIR" "$PKGLOGDIR" "$PKGDEPLOYDIR"
 
 pushd "$SCRIPTDIR" > /dev/null
 OS_NAME="Pygos"
@@ -63,14 +47,19 @@ source "$SCRIPTDIR/util/autotools.sh"
 ############################## toolchain config ##############################
 include_merge "TOOLCHAIN"
 
-mkdir -p "$TCDIR/$TARGET"
+HOSTTUPLE=$($SCRIPTDIR/util/config.guess)
+TCDIR="$BUILDROOT/$PRODUCT/toolchain"
+
+export PATH="$TCDIR/bin:$PATH"
+
+mkdir -p "$TCDIR/$TARGET" "$TCDIR/bin"
 
 CMAKETCFILE="$TCDIR/toolchain.cmake"
 
 ############################### build packages ###############################
 echo "--- resolving package dependencies ---"
 
-include_pkg "release-${BOARD}"
+include_pkg "$RELEASEPKG"
 dependencies | tsort | tac > "$PACKAGELIST"
 cat "$PACKAGELIST"
 
diff --git a/product/router-alix.layers b/product/router-alix.layers
new file mode 100644
index 0000000..5e6515b
--- /dev/null
+++ b/product/router-alix.layers
@@ -0,0 +1,3 @@
+bsp-alix
+router-base
+router-alix
diff --git a/product/router-rpi3.layers b/product/router-rpi3.layers
new file mode 100644
index 0000000..2002ac8
--- /dev/null
+++ b/product/router-rpi3.layers
@@ -0,0 +1,3 @@
+bsp-rpi3
+router-base
+router-rpi3
diff --git a/product/router/BOARDS b/product/router/BOARDS
deleted file mode 100644
index 2019f7b..0000000
--- a/product/router/BOARDS
+++ /dev/null
@@ -1,2 +0,0 @@
-rpi3
-alix
diff --git a/util/override.sh b/util/override.sh
index 9dfb670..08be3d1 100644
--- a/util/override.sh
+++ b/util/override.sh
@@ -1,16 +1,12 @@
 file_path_override() {
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1" ]; then
-		echo "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1"
-		return
-	fi
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$1" ]; then
-		echo "$SCRIPTDIR/product/$PRODUCT/$1"
-		return
-	fi
-	if [ -e "$SCRIPTDIR/board/$BOARD/$1" ]; then
-		echo "$SCRIPTDIR/board/$BOARD/$1"
-		return
-	fi
+	local layer
+
+	tac "$LAYERCONF" | while read layer; do
+		if [ -e "$SCRIPTDIR/layer/$layer/$1" ]; then
+			echo "$SCRIPTDIR/layer/$layer/$1"
+			return
+		fi
+	done
 }
 
 cat_file_override() {
@@ -22,15 +18,13 @@ cat_file_override() {
 }
 
 cat_file_merge() {
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1" ]; then
-		cat "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1"
-	fi
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$1" ]; then
-		cat "$SCRIPTDIR/product/$PRODUCT/$1"
-	fi
-	if [ -e "$SCRIPTDIR/board/$BOARD/$1" ]; then
-		cat "$SCRIPTDIR/board/$BOARD/$1"
-	fi
+	local layer
+
+	while read layer; do
+		if [ -e "$SCRIPTDIR/layer/$layer/$1" ]; then
+			cat "$SCRIPTDIR/layer/$layer/$1"
+		fi
+	done < "$LAYERCONF"
 }
 
 include_override() {
@@ -42,13 +36,11 @@ include_override() {
 }
 
 include_merge() {
-	if [ -e "$SCRIPTDIR/board/$BOARD/$1" ]; then
-		source "$SCRIPTDIR/board/$BOARD/$1"
-	fi
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$1" ]; then
-		source "$SCRIPTDIR/product/$PRODUCT/$1"
-	fi
-	if [ -e "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1" ]; then
-		source "$SCRIPTDIR/product/$PRODUCT/$BOARD/$1"
-	fi
+	local layer
+
+	while read layer; do
+		if [ -e "$SCRIPTDIR/layer/$layer/$1" ]; then
+			source "$SCRIPTDIR/layer/$layer/$1"
+		fi
+	done < "$LAYERCONF"
 }