workaround upstream clean bug

see https://github.com/insomnia-lab/libreant/issues/274

debian/rules

@@ -7,3 +7,7 @@ export PYBUILD_NAME = libreant
 
 override_dh_installinit:
 	dh_installinit --name=libreant
+
+override_dh_clean:
+	dh_clean
+	rm webant/translations/*/LC_MESSAGES/messages.mo