From 9f4191336db7c39d3977f6ca0b9f93a496820216 Mon Sep 17 00:00:00 2001
From: BFlat <bombayapirat@gmail.com>
Date: Mon, 9 Nov 2026 19:45:13 +0800
Subject: [PATCH] xtask: the private temp folder builder is mutable only on
 Unix (#6712)

---
 xtask/src/gates.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xtask/src/gates.rs b/xtask/src/gates.rs
index c6f1e06d83..b60f054c68 100644
--- a/xtask/src/gates.rs
+++ b/xtask/src/gates.rs
@@ -332,6 +332,8 @@ impl PrivateDir {
         let nanos = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).map_or(0, |d| d.subsec_nanos());
         for attempt in 0..100u32 {
             let path = std::env::temp_dir().join(format!("{prefix}-{}-{nanos}-{attempt}", std::process::id()));
+            // Only Unix sets a mode on the builder.
+            #[cfg_attr(not(unix), allow(unused_mut))]
             let mut builder = std::fs::DirBuilder::new();
             #[cfg(unix)]
             std::os::unix::fs::DirBuilderExt::mode(&mut builder, 0o700);