diff --git a/conf/layer.conf b/conf/layer.conf
index 2d1bdcf..f16cdee 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -6,7 +6,7 @@
             ${LAYERDIR}/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "ibm-layer"
-BBFILE_PATTERN_ibm-layer = ""
+BBFILE_PATTERN_ibm-layer := "^${LAYERDIR}/"
 LAYERSERIES_COMPAT_ibm-layer = "thud warrior"
 
 # Provide a variable that points the base of the ibm layer.