diff --git a/pkg/bbutil/umask_posix.go b/pkg/bbutil/umask_posix.go
index 13bddd2..3930906 100644
--- a/pkg/bbutil/umask_posix.go
+++ b/pkg/bbutil/umask_posix.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package bbutil
diff --git a/pkg/bbutil/umask_windows.go b/pkg/bbutil/umask_windows.go
index 1188a1b..5099e52 100644
--- a/pkg/bbutil/umask_windows.go
+++ b/pkg/bbutil/umask_windows.go
@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package bbutil