+.B --rm-old-changes
+When doing a build, delete any changes files matching
+.IB package _ version _*.changes
+before starting. This ensures that
+dgit push (and dgit sbuild) will be able to unambigously
+identify the relevant changes files from the most recent build, even
+if there have been previous builds with different tools or options.
+The default is not to remove, but
+.B \-\-no-rm-old-changes
+can be used to override a previous \-\-rm-old-changes
+or the .rm-old-changes configuration setting.
+.TP