$NetBSD$

# Non-portable mkdir flag
--- Makefile.orig	2017-02-22 08:30:03 UTC
+++ Makefile
@@ -820,7 +820,7 @@ uninstall-am:
 
 
 install-exec-hook:
-	mkdir --p $(libdir)
+	mkdir -p $(libdir)
 	R CMD INSTALL -l $(libdir) $(datadir)/${PACKAGE}/epactsR_3.3.2.tar.gz
 	R CMD INSTALL -l $(libdir) $(datadir)/${PACKAGE}/mmSKAT_0.95.tar.gz