--- libgo/go/runtime/testdata/testprognet/signalexec.go.orig	2020-03-04 19:30:03.000000000 +1100
+++ libgo/go/runtime/testdata/testprognet/signalexec.go	2020-09-08 13:23:20.888387000 +1000
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build bsdsunix darwin dragonfly freebsd linux netbsd openbsd
 
 // This is in testprognet instead of testprog because testprog
 // must not import anything (like net, but also like os/signal)