diff --git a/finder/finder.go b/finder/finder.go
index 8f9496d..c2df928 100644
--- a/finder/finder.go
+++ b/finder/finder.go
@@ -661,6 +661,9 @@
 		for _, info := range infos {
 			for !strings.HasPrefix(info.P+"/", prefix+"/") {
 				prefix = filepath.Dir(prefix)
+				if prefix == "/" {
+					break
+				}
 			}
 		}
 		// remove common prefix