--- Makefile.in.orig	2020-08-29 12:53:21 UTC
+++ Makefile.in
@@ -988,7 +988,7 @@ XVkbd-common.h: XVkbd-common.ad
 	[ which ad2c > /dev/null ] || ad2c XVkbd-common.ad > XVkbd-common.h
 
 install-data-hook:
-	[ -d $(DESTDIR)$(appdefaultdir) ] || mkdir $(DESTDIR)$(appdefaultdir)
+	[ -d $(DESTDIR)$(appdefaultdir) ] || mkdir -p $(DESTDIR)$(appdefaultdir)
 	for file in *.ad; do \
 		$(INSTALL_DATA) $$file $(DESTDIR)$(appdefaultdir)/$${file%.ad}; \
 	done