diff --git a/meta-networking/conf/layer.conf b/meta-networking/conf/layer.conf
index f26a172..1ea2bc2 100644
--- a/meta-networking/conf/layer.conf
+++ b/meta-networking/conf/layer.conf
@@ -1,9 +1,9 @@
 # We have a conf and classes directory, add to BBPATH
-BBPATH := "${BBPATH}:${LAYERDIR}"
+BBPATH .= ":${LAYERDIR}"
 
 # We have a packages directory, add to BBFILES
-BBFILES := "${BBFILES} ${LAYERDIR}/recipes-*/*/*.bb \
- ${LAYERDIR}/recipes-*/*/*.bbappend"
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+            ${LAYERDIR}/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "networking"
 BBFILE_PATTERN_networking := "^${LAYERDIR}/"