--- ./util/Makefile.in.orig	2021-07-20 16:35:24 +0000
+++ ./util/Makefile.in	2021-07-20 16:35:49 +0000
@@ -493,6 +493,7 @@
 	$(NULL)
 
 AM_CPPFLAGS = \
+	-DHB_LEAN \
 	-DHB_DISABLE_DEPRECATED \
 	-I$(top_srcdir)/src/ \
 	-I$(top_builddir)/src/ \