diff --git a/meta-quanta/meta-runbmc-nuvoton/conf/layer.conf b/meta-quanta/meta-runbmc-nuvoton/conf/layer.conf
index e5aca0e..2be0f0c 100644
--- a/meta-quanta/meta-runbmc-nuvoton/conf/layer.conf
+++ b/meta-quanta/meta-runbmc-nuvoton/conf/layer.conf
@@ -6,5 +6,5 @@
             ${LAYERDIR}/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "runbmc-nuvoton-layer"
-BBFILE_PATTERN_runbmc-nuvoton-layer = ""
+BBFILE_PATTERN_runbmc-nuvoton-layer := "^${LAYERDIR}/"
 LAYERSERIES_COMPAT_runbmc-nuvoton-layer = "thud warrior"