Index: include/prereq-build.mk
===================================================================
--- include/prereq-build.mk     (revision 6925)
+++ include/prereq-build.mk     (working copy)
@@ -121,3 +121,11 @@
 $(eval $(call RequireCommand,autoconf, \
        Please install GNU autoconf. \
 ))
+
+define Require/find
+       find . -maxdepth 1 -exec ls {} + > /dev/null 2>&1
+endef
+
+$(eval $(call Require,find, \
+       Please install find 4.2.12 or better. \
+))