--- linux-4.9.37/scripts/Makefile.clean	2017-07-12 16:42:41.000000000 +0300
+++ linux-4.9.y/scripts/Makefile.clean	2021-06-07 13:01:34.000000000 +0300
@@ -11,7 +11,7 @@
 
 # The filename Kbuild has precedence over Makefile
 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
+-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
 
 # Figure out what we need to build from the various variables
 # ==========================================================================