diff -puNr gnugo-3.8.orig/regression/eval.sh gnugo-3.8/regression/eval.sh
--- gnugo-3.8.orig/regression/eval.sh	2009-02-17 21:41:31.000000000 +0000
+++ gnugo-3.8/regression/eval.sh	2018-04-12 13:45:28.753815527 +0000
@@ -15,4 +15,4 @@ options3=$4  # May be omitted
 options4=$5  # May be omitted  FIXME: Do multiple options better.
 
 $GNUGO --quiet $options1 $options2 $options3 $options4 --mode gtp <$tstfile |\
-	awk -f $RD/regress.awk tst=$tstfile verbose=1
+	gawk -f $RD/regress.awk tst=$tstfile verbose=1
diff -puNr gnugo-3.8.orig/regression/regress.sh gnugo-3.8/regression/regress.sh
--- gnugo-3.8.orig/regression/regress.sh	2009-02-17 21:41:31.000000000 +0000
+++ gnugo-3.8/regression/regress.sh	2018-04-12 13:45:17.510391825 +0000
@@ -19,6 +19,6 @@ shift
 
 cd $srcdir
 $GNUGO --quiet "$@" --mode gtp < $tstfile \
-	| awk -f regress.awk tst=$tstfile url=$GNUGO_REGRESSION_URL
+	| gawk -f regress.awk tst=$tstfile url=$GNUGO_REGRESSION_URL
 
 # regress.sh ends here