--- nethack-3.4.3/util/Makefile	2004-08-21 01:09:06.724326360 +0200
+++ nethack-3.4.3.new//util/Makefile	2004-08-21 01:08:03.852884272 +0200
@@ -101,11 +101,11 @@
 
 # yacc/lex programs to use to generate *_comp.h, *_lex.c, and *_yacc.c.
 # if, instead of yacc/lex you have bison/flex, comment/uncomment the following.
-YACC     = yacc
-LEX      = lex
-# YACC     = bison -y
+#YACC     = yacc
+#LEX      = lex
+ YACC     = bison -y
 # YACC     = byacc
-# LEX      = flex
+ LEX      = flex
  
 # these are the names of the output files from YACC/LEX. Under MS-DOS
 # and similar systems, they may differ