diff --git a/make/topdir-autoconf.mk b/make/topdir-autoconf.mk
index 8f3e6894..0b6fa791 100644
--- a/make/topdir-autoconf.mk
+++ b/make/topdir-autoconf.mk
@@ -1,5 +1,6 @@
-AUTOCONF_IN            = $(wildcard *.in */*.in)
-AUTOCONF_GENERATED     = $(patsubst %.in,%,$(AUTOCONF_IN))
+AUTOCONF_IN           := $(wildcard *.in */*.in */*/*.in)
+# AUTOCONF_IN           := $(shell find . -maxdepth 3 -name '*.in' | grep -v dist)
+AUTOCONF_GENERATED    := $(patsubst %.in,%,$(AUTOCONF_IN))
 
 ifneq ($(AUTOCONF_IN),)
   ifneq ($(AUTOCONF_GENERATED),$(wildcard $(AUTCONF_GENERATED)))