--- a/gobm65.go	Sun Feb 26 14:25:55 2017 +0100
+++ b/gobm65.go	Sun Feb 26 14:46:10 2017 +0100
@@ -227,6 +227,7 @@
 		}
 	}
 
+	// Note that sort.Slice was introduced in go 1.8
 	sort.Slice(oldItems, func(i, j int) bool {
 		return isLater(oldItems[i], oldItems[j])
 	})