$NetBSD: patch-src_Makefile,v 1.1 2018/01/10 16:29:44 jaapb Exp $

Use DESTDIR
--- src/Makefile.orig	2017-10-13 16:43:54.000000000 +0000
+++ src/Makefile
@@ -84,9 +84,9 @@ TOINSTALL_STUBS=dllnums.$(SO)
 
 install:
 	$(OCAMLFIND) install num META
-	$(INSTALL_DATA) $(TOINSTALL) $(STDLIBDIR)
+	$(INSTALL_DATA) $(TOINSTALL) ${DESTDIR}$(STDLIBDIR)
 ifeq "$(SUPPORTS_SHARED_LIBRARIES)" "true"
-	$(INSTALL_DLL) $(TOINSTALL_STUBS) $(STDLIBDIR)/stublibs
+	$(INSTALL_DLL) $(TOINSTALL_STUBS) ${DESTDIR}$(STDLIBDIR)/stublibs
 endif
 
 uninstall:
