--- a/Makefile.in	2022-02-17 20:34:02.134144390 +0100
+++ b/Makefile.in	2022-02-17 20:32:31.957625786 +0100
@@ -109,7 +109,7 @@
 	do	\
 		here=`pwd` && \
 		cd $$sub && \
-		$(MAKE) top_builddir=$$here test || exit $$? && \
+		$(MAKE) top_builddir=$$here libdir=.. test || exit $$? && \
 		cd $$here ; \
 	done