diff --git a/build.cmd b/build.cmd
index d0d68b5d7..0657b8e1e 100644
--- a/build.cmd
+++ b/build.cmd
@@ -1,7 +1,7 @@
 @echo off
 if "%~1"=="" goto :error
 
-SET %VERSION%=%~1
+SET VERSION=%~1
 
 Echo Building Microsoft.OpenApi
 
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
new file mode 100644
index 000000000..adb086cc1
--- /dev/null
+++ b/src/Directory.Build.props
@@ -0,0 +1,8 @@
+<Project>
+  <PropertyGroup>
+    <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-*" PrivateAssets="All"/>
+  </ItemGroup>
+</Project>
\ No newline at end of file