diff --git a/src/cmd/link/internal/ld/outbuf_darwin.go b/src/cmd/link/internal/ld/outbuf_darwin.go
index 6920a0a..b1ee3c5 100644
--- a/src/cmd/link/internal/ld/outbuf_darwin.go
+++ b/src/cmd/link/internal/ld/outbuf_darwin.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin && go1.12
+// +build darwin,go1.12
+
 package ld
 
 import (
diff --git a/src/cmd/link/internal/ld/outbuf_nofallocate.go b/src/cmd/link/internal/ld/outbuf_nofallocate.go
index 6564bd5..3bffe45 100644
--- a/src/cmd/link/internal/ld/outbuf_nofallocate.go
+++ b/src/cmd/link/internal/ld/outbuf_nofallocate.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !darwin && !linux
-// +build !darwin,!linux
+//go:build (!darwin && !linux) || (darwin && !go1.12)
+// +build !darwin,!linux darwin,!go1.12
 
 package ld
 
diff --git a/src/cmd/link/internal/ld/outbuf_notdarwin.go b/src/cmd/link/internal/ld/outbuf_notdarwin.go
index f9caa41..85e6442 100644
--- a/src/cmd/link/internal/ld/outbuf_notdarwin.go
+++ b/src/cmd/link/internal/ld/outbuf_notdarwin.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !darwin
-// +build !darwin
+//go:build !darwin || (darwin && !go1.12)
+// +build !darwin darwin,!go1.12
 
 package ld