AC_MSG_ERROR([Guile-lzlib is missing; please install it.])
fi
+dnl Check for Guile-Avahi.
+GUILE_MODULE_AVAILABLE([have_guile_avahi], [(avahi)])
+AM_CONDITIONAL([HAVE_GUILE_AVAHI],
+ [test "x$have_guile_avahi" = "xyes"])
+
dnl Guile-newt is used by the graphical installer.
GUILE_MODULE_AVAILABLE([have_guile_newt], [(newt)])