diff --git a/src/cmd/go/internal/script/cmds_other.go b/src/cmd/go/internal/script/cmds_nonunix.go
similarity index 75%
rename from src/cmd/go/internal/script/cmds_other.go
rename to src/cmd/go/internal/script/cmds_nonunix.go
index 847b225ae6..07bf284fa9 100644
--- a/src/cmd/go/internal/script/cmds_other.go
+++ b/src/cmd/go/internal/script/cmds_nonunix.go
@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !(unix || windows)
+//go:build !unix
 
 package script
 
 func isETXTBSY(err error) bool {
+	// syscall.ETXTBSY is only meaningful on Unix platforms.
 	return false
 }
diff --git a/src/cmd/go/internal/script/cmds_posix.go b/src/cmd/go/internal/script/cmds_unix.go
similarity index 91%
rename from src/cmd/go/internal/script/cmds_posix.go
rename to src/cmd/go/internal/script/cmds_unix.go
index 2525f6e752..94a16b5e9a 100644
--- a/src/cmd/go/internal/script/cmds_posix.go
+++ b/src/cmd/go/internal/script/cmds_unix.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 unix || windows
+//go:build unix
 
 package script