From 6af6235128961bc9cf5f211a0a8dd115b432415f Mon Sep 17 00:00:00 2001
From: Matt Mitchell <mmitche@microsoft.com>
Date: Mon, 12 Feb 2024 12:00:19 -0800
Subject: [PATCH] Do not copy restored package content if already exists
 (#18626)

---
 src/SourceBuild/content/repo-projects/Directory.Build.targets | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/SourceBuild/content/repo-projects/Directory.Build.targets b/src/SourceBuild/content/repo-projects/Directory.Build.targets
index d5be01c5f..8fe1be590 100644
--- a/src/SourceBuild/content/repo-projects/Directory.Build.targets
+++ b/src/SourceBuild/content/repo-projects/Directory.Build.targets
@@ -413,7 +413,8 @@
 
     <Copy SourceFiles="@(_InnerPackageCacheFiles)"
           DestinationFiles="$(NuGetPackageRoot)%(RecursiveDir)%(Filename)%(Extension)"
-          Condition=" '@(_InnerPackageCacheFiles)' != '' " />
+          SkipUnchangedFiles="true"
+          Condition="'@(_InnerPackageCacheFiles)' != ''" />
   </Target>
 
   <Target Name="CleanupRepo"