From 7ef3bf28c05eaed128db86855183685e9d7bbd96 Mon Sep 17 00:00:00 2001
From: Gabriel Russell <gabriel.russell@mongodb.com>
Date: Tue, 3 Oct 2017 12:50:09 -0400
Subject: update mtime on cache retrieval

---
 src/engine/SCons/CacheDir.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/engine/SCons/CacheDir.py b/src/engine/SCons/CacheDir.py
index ac91c85..ab80808 100644
--- a/src/engine/SCons/CacheDir.py
+++ b/src/engine/SCons/CacheDir.py
@@ -56,6 +56,10 @@ def CacheRetrieveFunc(target, source, env):
             fs.symlink(fs.readlink(cachefile), t.get_internal_path())
         else:
             env.copy_from_cache(cachefile, t.get_internal_path())
+            try:
+                os.utime(cachefile, None)
+            except OSError:
+                pass
         st = fs.stat(cachefile)
         fs.chmod(t.get_internal_path(), stat.S_IMODE(st[stat.ST_MODE]) | stat.S_IWRITE)
     return 0
-- 
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