--- hijri/Makefile.orig	2013-09-25 23:36:27.000000000 +0800
+++ hijri/Makefile	2013-09-25 23:36:43.000000000 +0800
@@ -10,10 +10,10 @@ demo_hijri:
 
 install: all
 	@echo "==> Installing hijri component..."
-	test -d $(PREFIX)/include/itl \
-	|| install -d $(PREFIX)/include/itl \
+	test -d $(DESTDIR)$(PREFIX)/include/itl \
+	|| install -d $(DESTDIR)$(PREFIX)/include/itl \
 	|| exit 1;
-	install src/hijri.h $(PREFIX)/include/itl
+	install src/hijri.h $(DESTDIR)$(PREFIX)/include/itl
 
 uninstall:
 	@echo "==> Uninstalling hijri component..."