diff --git a/build/PackSiteExtension.targets b/build/PackSiteExtension.targets
new file mode 100644
index 0000000000..14c00536ca
--- /dev/null
+++ b/build/PackSiteExtension.targets
@@ -0,0 +1,45 @@
+<Project>
+  <PropertyGroup>
+    <PackageDependsOn>$(PackageDependsOn);PackSiteExtensionFiles</PackageDependsOn>
+    <MSBuildProjectFiles>$(MSBuildProjectFiles);$(MSBuildThisFileFullPath)</MSBuildProjectFiles>
+
+    <SiteExtensionOobArchive>$(BuildDir)runtime-site-extension-internal-$(PackageVersion).zip</SiteExtensionOobArchive>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ArtifactInfo Include="$(SiteExtensionOobArchive)">
+      <ArtifactType>ZipArchive</ArtifactType>
+      <RepositoryRoot>$(RepositoryRoot)</RepositoryRoot>
+      <Category>shipoob</Category>
+    </ArtifactInfo>
+    <FilesToSign Include="$(SiteExtensionOobArchive)" IsContainer="true" />
+    <FilesToSign Include="content/Microsoft.Web.Xdt.Extensions.dll" Container="$(SiteExtensionOobArchive)" Certificate="$(AssemblySigningCertName)" />
+  </ItemGroup>
+
+  <Target Name="PackSiteExtensionFiles"
+    DependsOnTargets="Compile;_CollectSiteExtensionFiles"
+    Inputs="@(SiteExtensionFile);$(MSBuildProjectFiles)"
+    Outputs="$(SiteExtensionOobArchive)">
+
+    <ZipArchive
+      SourceFiles="@(SiteExtensionFile)"
+      WorkingDirectory="$(SiteExtBasePath)"
+      File="$(SiteExtensionOobArchive)"
+      Overwrite="True" />
+
+  </Target>
+
+  <Target Name="_CollectSiteExtensionFiles">
+    <PropertyGroup>
+      <SiteExtBasePath>$(RepositoryRoot)extensions\Microsoft.AspNetCore.Runtime.SiteExtension\</SiteExtBasePath>
+    </PropertyGroup>
+    <ItemGroup>
+      <SiteExtensionFile Include="$(RepositoryRoot)src\Microsoft.Web.Xdt.Extensions\bin\$(Configuration)\net461\Microsoft.Web.Xdt.Extensions.dll"
+        Link="content/Microsoft.Web.Xdt.Extensions.dll" />
+      <SiteExtensionFile Include="$(SiteExtBasePath)install.cmd"
+        Link="content/install.cmd" />
+      <SiteExtensionFile Include="$(SiteExtBasePath)applicationHost.xdt"
+        Link="content/applicationHost.xdt" />
+    </ItemGroup>
+  </Target>
+</Project>
diff --git a/build/repo.props b/build/repo.props
index cfaaff9b40..3a586a018d 100644
--- a/build/repo.props
+++ b/build/repo.props
@@ -1,5 +1,9 @@
 <Project>
+  <Import Project="dependencies.props" />
+
   <PropertyGroup>
+    <AssemblySigningCertName>Microsoft</AssemblySigningCertName>
+
     <FunctionalTestsProject>$(RepositoryRoot)test\Microsoft.AspNetCore.AzureAppServices.FunctionalTests\Microsoft.AspNetCore.AzureAppServices.FunctionalTests.csproj</FunctionalTestsProject>
 
     <!-- These properties are use by the automation that updates dependencies.props -->
diff --git a/build/repo.targets b/build/repo.targets
index 2e2fb83da6..4095bb0f38 100644
--- a/build/repo.targets
+++ b/build/repo.targets
@@ -1,5 +1,5 @@
 <Project>
-  <Import Project="$(RepositoryRoot)\build\dependencies.props" />
+  <Import Project="PackSiteExtension.targets" />
 
   <PropertyGroup>
       <ComposeSdk Condition="$(SITE_EXTENSION_SDK_VERSION) == ''">True</ComposeSdk>