--- configure.ac	2009-06-14 12:58:58.000000000 -0400
+++ /Users/snc/Source/sbsat/configure.ac	2009-08-25 09:04:51.000000000 -0400
@@ -312,6 +312,8 @@
 AM_PROG_LEX
 AC_PROG_YACC("bison -y")
 # AC_PROG_LIBTOOL
+AM_PATH_PYTHON([2.5],, [:])
+AC_PROG_SED
 
 AC_SUBST(ECHO_N)
 AC_SUBST(ECHO_C)