diff --git a/NuGet.Config b/NuGet.Config
index 2a1e0af74d..3abd236d42 100644
--- a/NuGet.Config
+++ b/NuGet.Config
@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
+
 <configuration>
   <packageSources>
     <clear />
     <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
+      <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
   </packageSources>
 </configuration>
diff --git a/src/Avalonia.Base/Avalonia.Base.csproj b/src/Avalonia.Base/Avalonia.Base.csproj
index cbcf7a7386..69afc8b304 100644
--- a/src/Avalonia.Base/Avalonia.Base.csproj
+++ b/src/Avalonia.Base/Avalonia.Base.csproj
@@ -13,4 +13,12 @@
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\JetBrains.Annotations.props" />
   <Import Project="..\..\build\System.Memory.props" />
+
+  <ItemGroup>
+    <ResolvedMatchingContract Include="..\..\LastMajorVersionBinaries\$(AssemblyName).dll" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.DotNet.ApiCompat" Version="5.0.0-beta.20364.3" PrivateAssets="All" />
+  </ItemGroup>
 </Project>