diff --git a/Directory.Packages.props b/Directory.Packages.props
index 5d6f656..8dc1860 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -8,6 +8,15 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
 
+  <!--
+    Global pacakge references
+    https://learn.microsoft.com/nuget/consume-packages/central-package-management#global-package-references
+    -->
+  <ItemGroup Label="Source Only Global Packages" Condition=" '$(SourceOnlyPackagesEnabled)' == 'true' ">
+    <GlobalPackageReference Include="Microsoft.SourceLink.GitHub"               Version="8.0.0" />
+    <GlobalPackageReference Include="Nerdbank.GitVersioning"                    Version="3.6.139" />
+  </ItemGroup>
+
   <!--
     Global pacakge references
     https://learn.microsoft.com/nuget/consume-packages/central-package-management#global-package-references
@@ -16,4 +25,17 @@
     <GlobalPackageReference Include="Microsoft.Build.CopyOnWrite" Version="1.0.302" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageVersion Include="Nullable"                                          Version="1.3.1" />
+  </ItemGroup>
+
+  <ItemGroup Label="Test Only Packages" Condition=" '$(TestOnlyPackagesEnabled)' == 'true' ">
+    <PackageVersion Include="BenchmarkDotNet"                                   Version="0.13.12" />
+    <PackageVersion Include="coverlet.collector"                                Version="6.0.2" />
+    <PackageVersion Include="coverlet.msbuild"                                  Version="6.0.2" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk"                            Version="17.10.0" />
+    <PackageVersion Include="xunit"                                             Version="2.8.1" />
+    <PackageVersion Include="xunit.runner.visualstudio"                         Version="2.8.1" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
new file mode 100644
index 0000000..57dabbe
--- /dev/null
+++ b/src/Directory.Build.props
@@ -0,0 +1,10 @@
+<Project>
+
+  <PropertyGroup>
+    <!-- Enable source only packages. -->
+    <SourceOnlyPackagesEnabled>true</SourceOnlyPackagesEnabled>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)/../Directory.Build.props" />
+
+</Project>
diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
deleted file mode 100644
index e3a641c..0000000
--- a/src/Directory.Packages.props
+++ /dev/null
@@ -1,18 +0,0 @@
-<Project>
-
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Packages.props, $(MSBuildThisFileDirectory)..))" />
-
-  <!--
-    Global pacakge references
-    https://learn.microsoft.com/nuget/consume-packages/central-package-management#global-package-references
-    -->
-  <ItemGroup>
-    <GlobalPackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
-    <GlobalPackageReference Include="Nerdbank.GitVersioning" Version="3.6.139" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageVersion Include="Nullable"                                          Version="1.3.1" />
-  </ItemGroup>
-
-</Project>
diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index eaebd8c..6ef1952 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -1,5 +1,8 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
+    <!-- Enable test only packages. -->
+    <TestOnlyPackagesEnabled>true</TestOnlyPackagesEnabled>
+
     <!-- Don't publish test projects by default. -->
     <IsPublishable>false</IsPublishable>
 
diff --git a/test/Directory.Packages.props b/test/Directory.Packages.props
deleted file mode 100644
index 362a84f..0000000
--- a/test/Directory.Packages.props
+++ /dev/null
@@ -1,14 +0,0 @@
-<Project>
-
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Packages.props, $(MSBuildThisFileDirectory)..))" />
-
-  <ItemGroup>
-    <PackageVersion Include="BenchmarkDotNet"                                   Version="0.13.12" />
-    <PackageVersion Include="coverlet.collector"                                Version="6.0.2" />
-    <PackageVersion Include="coverlet.msbuild"                                  Version="6.0.2" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk"                            Version="17.10.0" />
-    <PackageVersion Include="xunit"                                             Version="2.8.1" />
-    <PackageVersion Include="xunit.runner.visualstudio"                         Version="2.8.1" />
-  </ItemGroup>
-
-</Project>