Replaced Nat.thy by NatDef.thy because Nat.thy depends on
inductive_package.
--- a/src/HOL/Tools/inductive_package.ML Fri Jul 24 12:50:34 1998 +0200
+++ b/src/HOL/Tools/inductive_package.ML Fri Jul 24 12:53:04 1998 +0200
@@ -288,7 +288,7 @@
fun con_elim_tac simps =
let val elim_tac = REPEAT o (eresolve_tac elim_rls)
in ALLGOALS(EVERY'[elim_tac,
- asm_full_simp_tac (simpset_of Nat.thy addsimps simps),
+ asm_full_simp_tac (simpset_of NatDef.thy addsimps simps),
elim_tac,
REPEAT o bound_hyp_subst_tac])
THEN prune_params_tac