Index: Tools/Google.Apis.NuGet.Publisher/NuGetApiPublisher.cs
===================================================================
--- a/Tools/Google.Apis.NuGet.Publisher/NuGetApiPublisher.cs
+++ b/Tools/Google.Apis.NuGet.Publisher/NuGetApiPublisher.cs
@@ -29,6 +29,7 @@
 
 using Google.Apis.NuGet.Publisher.Discovery;
 using Google.Apis.Utils;
+using Google.Apis.Utils.Trace;
 
 namespace Google.Apis.NuGet.Publisher
 {