diff --git a/metro/lib/Makefile b/metro/lib/Makefile
index ce6f572c..1ec8dfbf 100644
--- a/metro/lib/Makefile
+++ b/metro/lib/Makefile
@@ -6,10 +6,10 @@ build:
 install:
 	@echo ">>> Making install in `pwd`"
 	mkdir -p $(DESTDIR)$(NMLIBDIR)
-	$(NINSTALL) -m 0755 -e 's|%NMLIBDIR%|$(NMLIBDIR)|' $(SUBST) *.pl \
+	$(NINSTALL) -m 0644 -e 's|%NMLIBDIR%|$(NMLIBDIR)|' $(SUBST) *.pl \
 			$(DESTDIR)$(NMLIBDIR)
 	mkdir -p $(DESTDIR)$(NMLIBDIR)/probes
-	$(NINSTALL) -m 0755 -e 's|%NMLIBDIR%|$(NMLIBDIR)|' $(SUBST) probes/*.pl \
+	$(NINSTALL) -m 0644 -e 's|%NMLIBDIR%|$(NMLIBDIR)|' $(SUBST) probes/*.pl \
 			$(DESTDIR)$(NMLIBDIR)/probes
 	mkdir -p $(DESTDIR)$(NMLIBDIR)/plugins
 	$(NINSTALL) -m 0755 -e 's|%NMLIBDIR%|$(NMLIBDIR)|' $(SUBST) plugins/* \