-BINPATH = $(PREFIX)/bin
-SBINPATH = $(PREFIX)/sbin
-MANPATH = $(PREFIX)/share/man
-SHAREDIR = $(PREFIX)/share/smailq
+BINPATH = $(DESTDIR)$(PREFIX)/bin
+SBINPATH = $(DESTDIR)$(PREFIX)/sbin
+MANPATH = $(DESTDIR)$(PREFIX)/share/man/man1
+SHAREDIR = $(DESTDIR)$(PREFIX)/share/smailq