Index: src/runtime/sys_libc.go
--- src/runtime/sys_libc.go.orig
+++ src/runtime/sys_libc.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build darwin || (openbsd && !mips64)
+//go:build darwin || openbsd
 
 package runtime