-ln -sf sarge /mirror/debian/dists/testing
-ln -sf sid /mirror/debian/dists/unstable
-ln -sf sarge /mirror/debian/non-US/dists/testing
-ln -sf sid /mirror/debian/non-US/dists/unstable
+ln -nsf sarge /mirror/debian/dists/testing
+ln -nsf sid /mirror/debian/dists/unstable
+ln -nsf sarge /mirror/debian/non-US/dists/testing
+ln -nsf sid /mirror/debian/non-US/dists/unstable