diff --git a/src/SourceBuild/content/eng/tools/init-build.proj b/src/SourceBuild/content/eng/tools/init-build.proj
index 12d0f83b8..54a657c9e 100644
--- a/src/SourceBuild/content/eng/tools/init-build.proj
+++ b/src/SourceBuild/content/eng/tools/init-build.proj
@@ -15,6 +15,7 @@
       UnpackTarballs;
       BuildXPlatTasks;
       BuildMSBuildSdkResolver;
+      BuildSdkArchiveDiff;
       BuildUnifiedBuildValidationTests;
       BuildLeakDetection;
       ExtractToolPackage;
@@ -126,6 +127,15 @@
              Targets="Build" />
   </Target>
 
+  <Target Name="BuildSdkArchiveDiff"
+          Condition="'$(ShortStack)' != 'true' and '$(PortableBuild)' == 'true' and '$(PgoInstrument)' != 'true'" >
+    <MSBuild Projects="tasks\Microsoft.DotNet.SourceBuild.Tasks.SdkArchiveDiff\Microsoft.DotNet.SourceBuild.Tasks.SdkArchiveDiff.csproj"
+             Targets="Restore"
+             Properties="MSBuildRestoreSessionId=$([System.Guid]::NewGuid())" />
+    <MSBuild Projects="tasks\Microsoft.DotNet.SourceBuild.Tasks.SdkArchiveDiff\Microsoft.DotNet.SourceBuild.Tasks.SdkArchiveDiff.csproj"
+             Targets="Build" />
+  </Target>
+
   <Target Name="GenerateRootFs"
           Condition="'$(BuildOS)' != 'windows' and '$(CrossBuild)' == 'true' and '$(ROOTFS_DIR)' == ''">
     <PropertyGroup>
diff --git a/src/SourceBuild/content/eng/unifiedBuildValidation.targets b/src/SourceBuild/content/eng/unifiedBuildValidation.targets
index 92a342626..9103da84d 100644
--- a/src/SourceBuild/content/eng/unifiedBuildValidation.targets
+++ b/src/SourceBuild/content/eng/unifiedBuildValidation.targets
@@ -1,5 +1,8 @@
 <Project>
 
+  <UsingTask AssemblyFile="$(SdkArchiveDiffTasksAssembly)" TaskName="GetValidArchiveItems" />
+  <UsingTask AssemblyFile="$(SdkArchiveDiffTasksAssembly)" TaskName="GetClosestOfficialSdk" />
+
   <PropertyGroup>
     <UnifiedBuildValidationTestsDir>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'test', 'Microsoft.DotNet.UnifiedBuild.Tests'))</UnifiedBuildValidationTestsDir>
     <UnifiedBuildValidationTestsProject>$([MSBuild]::NormalizeDirectory('$(UnifiedBuildValidationTestsDir)', 'Microsoft.DotNet.UnifiedBuild.Tests'))</UnifiedBuildValidationTestsProject>