--- macros/guile_orig.m4	2013-07-31 00:25:19.715073145 -0700
+++ macros/guile.m4	2013-07-31 00:27:01.763927099 -0700
@@ -72,21 +72,21 @@
 # The variables are marked for substitution, as by @code{AC_SUBST}.
 #
 AC_DEFUN([GUILE_PROGS],
- [AC_PATH_PROG(GUILE,guile)
+ [AC_PATH_PROG(GUILE,guile1.8)
   if test x$with_guile = xyes ; then 
      if test "$GUILE" = "" ; then
 	AC_MSG_ERROR([guile required but not found])
      fi
   fi
   AC_SUBST(GUILE)
-  AC_PATH_PROG(GUILE_CONFIG,guile-config)
+  AC_PATH_PROG(GUILE_CONFIG,guile1.8-config)
   if test x$with_guile = xyes ; then 
      if test "$GUILE_CONFIG" = "" ; then
         AC_MSG_ERROR([guile-config required but not found])
      fi
   fi
   AC_SUBST(GUILE_CONFIG)
-  AC_PATH_PROG(GUILE_TOOLS,guile-tools)
+  AC_PATH_PROG(GUILE_TOOLS,guile1.8-tools)
   AC_SUBST(GUILE_TOOLS)
  ])