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