diff --git a/unix/asm_linux_arm64.s b/unix/asm_linux_arm64.s
index 308e68df..5570d65b 100644
--- a/unix/asm_linux_arm64.s
+++ b/unix/asm_linux_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build arm64
 // +build !gccgo
 
 #include "textflag.h"
diff --git a/unix/syscall_linux_arm64.go b/unix/syscall_linux_arm64.go
index c0679637..ac8b7af5 100644
--- a/unix/syscall_linux_arm64.go
+++ b/unix/syscall_linux_arm64.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build arm64
+
 package unix
 
 const _SYS_dup = SYS_DUP3
diff --git a/unix/zerrors_linux_arm64.go b/unix/zerrors_linux_arm64.go
index 6be5d4b5..de958605 100644
--- a/unix/zerrors_linux_arm64.go
+++ b/unix/zerrors_linux_arm64.go
@@ -4,6 +4,8 @@
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs -- _const.go
 
+// +build arm64
+
 package unix
 
 import "syscall"
diff --git a/unix/zerrors_linux_ppc64le.go b/unix/zerrors_linux_ppc64le.go
index 0234b316..d9d0b1f8 100644
--- a/unix/zerrors_linux_ppc64le.go
+++ b/unix/zerrors_linux_ppc64le.go
@@ -4,6 +4,8 @@
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs -- -m64 _const.go
 
+// +build ppc64le
+
 package unix
 
 import "syscall"
diff --git a/unix/zsyscall_linux_arm64.go b/unix/zsyscall_linux_arm64.go
index 33623e98..2ec05f71 100644
--- a/unix/zsyscall_linux_arm64.go
+++ b/unix/zsyscall_linux_arm64.go
@@ -1,6 +1,8 @@
 // mksyscall.pl syscall_linux.go syscall_linux_arm64.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
+// +build arm64
+
 package unix
 
 import (
diff --git a/unix/zsyscall_linux_ppc64le.go b/unix/zsyscall_linux_ppc64le.go
index 1216ad39..a4d333b7 100644
--- a/unix/zsyscall_linux_ppc64le.go
+++ b/unix/zsyscall_linux_ppc64le.go
@@ -1,6 +1,8 @@
 // mksyscall.pl syscall_linux.go syscall_linux_ppc64x.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
+// +build ppc64le
+
 package unix
 
 import (
diff --git a/unix/zsysnum_linux_arm64.go b/unix/zsysnum_linux_arm64.go
index 6aadee48..42d7ab19 100644
--- a/unix/zsysnum_linux_arm64.go
+++ b/unix/zsysnum_linux_arm64.go
@@ -1,6 +1,8 @@
 // mksysnum_linux.pl /usr/include/asm-generic/unistd.h
 // MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
 
+// +build arm64
+
 package unix
 
 const (
diff --git a/unix/zsysnum_linux_ppc64le.go b/unix/zsysnum_linux_ppc64le.go
index b266ffa8..d87daab9 100644
--- a/unix/zsysnum_linux_ppc64le.go
+++ b/unix/zsysnum_linux_ppc64le.go
@@ -1,6 +1,8 @@
 // mksysnum_linux.pl /usr/include/powerpc64le-linux-gnu/asm/unistd.h
 // MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
 
+// +build ppc64le
+
 package unix
 
 const (
diff --git a/unix/ztypes_linux_arm64.go b/unix/ztypes_linux_arm64.go
index cbf3c17e..931e0a37 100644
--- a/unix/ztypes_linux_arm64.go
+++ b/unix/ztypes_linux_arm64.go
@@ -1,6 +1,8 @@
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs -- -fsigned-char types_linux.go
 
+// +build arm64
+
 package unix
 
 const (
diff --git a/unix/ztypes_linux_ppc64le.go b/unix/ztypes_linux_ppc64le.go
index 58b8a446..31196b77 100644
--- a/unix/ztypes_linux_ppc64le.go
+++ b/unix/ztypes_linux_ppc64le.go
@@ -1,6 +1,8 @@
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs types_linux.go
 
+// +build ppc64le
+
 package unix
 
 const (