--- a/jdk/makefiles/SignJars.gmk	Wed Jul 05 18:48:16 2017 +0200
+++ b/jdk/makefiles/SignJars.gmk	Fri Apr 05 09:39:10 2013 +0200
@@ -79,8 +79,7 @@
 	fi
 
 $(JCE_OUTPUTDIR)/%: $(IMAGES_OUTPUTDIR)/unsigned/%
-	$(MKDIR) -p $(@D)
-	$(CP) $< $@
+	$(call install-file)
 	$(JARSIGNER) -keystore $(SIGNING_KEYSTORE) \
 	    $@ $(SIGNING_ALIAS) < $(SIGNING_PASSPHRASE)
 	@$(PRINTF) "\nJar codesigning finished.\n"