diff -up tree-1.6.0/Makefile.preserve-timestamps tree-1.6.0/Makefile

--- tree-1.6.0/Makefile.preserve-timestamps	2011-06-27 16:11:26.000000000 +0100

+++ tree-1.6.0/Makefile	2011-06-27 16:12:36.394443602 +0100

@@ -97,9 +97,9 @@ install: tree

 	install -d $(BINDIR)

 	install -d $(MANDIR)

 	if [ -e $(TREE_DEST) ]; then \

-		install $(TREE_DEST) $(BINDIR)/$(TREE_DEST); \

+		install -p $(TREE_DEST) $(BINDIR)/$(TREE_DEST); \

 	fi

-	install doc/$(MAN) $(MANDIR)/$(MAN)

+	install -p doc/$(MAN) $(MANDIR)/$(MAN)

 distclean:

 	if [ -f tree.o ]; then rm *.o; fi