diff --git a/src/SourceBuild/content/repo-projects/Directory.Build.targets b/src/SourceBuild/content/repo-projects/Directory.Build.targets
index 729425f21..44cc7af06 100644
--- a/src/SourceBuild/content/repo-projects/Directory.Build.targets
+++ b/src/SourceBuild/content/repo-projects/Directory.Build.targets
@@ -351,7 +351,10 @@
 
     <Exec Command="$(FullCommand)"
           WorkingDirectory="$(ProjectDirectory)"
-          EnvironmentVariables="@(EnvironmentVariables)" />
+          EnvironmentVariables="@(EnvironmentVariables)"
+          IgnoreStandardErrorWarningFormat="true">
+      <Output TaskParameter="ExitCode" PropertyName="RepoBuildExitCode" />
+    </Exec>
 
     <Message Importance="High" Text="[$([System.DateTime]::Now.ToString('HH:mm:ss.ff'))] Building $(RepositoryName)...done" />