--- libcruft/mkf77def.in.orig	2011-02-08 04:00:51.000000000 -0600
+++ libcruft/mkf77def.in	2011-04-20 18:26:34.000000000 -0500
@@ -18,7 +18,7 @@
 # along with Octave; see the file COPYING.  If not, see
 # <http://www.gnu.org/licenses/>.
 
-SED=${SED:-'sed'}
+SED=gsed
 AWK=${AWK:-'awk'}
 
 F77_TOLOWER="@F77_APPEND_UNDERSCORE@"