Cutting shapefile with polygon


first of all - sorry for my english :slight_smile:

I render a map of germany via mapnik using the germany-extract from geofabrik.
For lower zoom levels I am using the builtup_area shapefile for town-rendering.

My problem is that I get also the towns of e.g. the netherlands.

Question: Is there a simple possibility to cut the shapefile with a germany-polygon? Or is it possible to say mapnik to take the buildup-data for germany?

Many thanks,