--- a/tools/userland-fetch	Wed Sep 21 09:01:17 2016 -0700
+++ b/tools/userland-fetch	Thu Sep 15 14:23:59 2016 -0700
@@ -341,6 +341,9 @@
 				if not quiet:
 					print "failed"
 				continue
+		else:
+			print " unknown scheme '%s'" % scheme
+			return
 
 		yield name