diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index a76fe55..39d3e78 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -94,6 +94,7 @@ python base_do_fetch() {
 
 addtask unpack after do_fetch
 do_unpack[dirs] = "${WORKDIR}"
+do_unpack[cleandirs] = "${S}/patches"
 python base_do_unpack() {
 	src_uri = (d.getVar('SRC_URI', True) or "").split()
 	if len(src_uri) == 0: