+
+To use the adns and nettle bindings you need to have the appropriate
+libraries installed too, although these are not listed as
+dependencies. Programs which use these extensions should list
+dependencies on (currently) libadns1 and libnettle2. Regrettably,
+there is no clear way to get the dependencies completely correct in
+the case where chiark-tcl is rebuilt against some other versions of
+adns and/or nettle.