Not sure yet how we fix this in a backwards compatible fashion.
index b44e826..a95e5ce 100755
--- a/src/jit-diff/jit-diff.cs
+++ b/src/jit-diff/jit-diff.cs
@@ -94,7 +94,7 @@ private static string GetBuildOS(string platformMoniker)
switch (platformMoniker)
{
case "Windows":
- return "Windows_NT";
+ return "Windows";
case "Linux":
return "Linux";
case "OSX":
cc @dotnet/jit-contrib