diff --git a/src/libraries/System.Composition.AttributedModel/pkg/System.Composition.AttributedModel.pkgproj b/src/libraries/System.Composition.AttributedModel/pkg/System.Composition.AttributedModel.pkgproj
index 0e4a471f53ebf1..340da4ff117379 100644
--- a/src/libraries/System.Composition.AttributedModel/pkg/System.Composition.AttributedModel.pkgproj
+++ b/src/libraries/System.Composition.AttributedModel/pkg/System.Composition.AttributedModel.pkgproj
@@ -4,8 +4,8 @@
     <ProjectReference Include="..\src\System.Composition.AttributedModel.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-
-    <HarvestIncludePaths Include="lib/netstandard1.0;lib/portable-net45+win8+wp8+wpa81" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Composition.Convention/pkg/System.Composition.Convention.pkgproj b/src/libraries/System.Composition.Convention/pkg/System.Composition.Convention.pkgproj
index 7fa2b85ed06b91..8239d4a17e689a 100644
--- a/src/libraries/System.Composition.Convention/pkg/System.Composition.Convention.pkgproj
+++ b/src/libraries/System.Composition.Convention/pkg/System.Composition.Convention.pkgproj
@@ -4,8 +4,8 @@
     <ProjectReference Include="..\src\System.Composition.Convention.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-
-    <HarvestIncludePaths Include="lib/netstandard1.0;lib/portable-net45+win8+wp8+wpa81" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Composition.Hosting/pkg/System.Composition.Hosting.pkgproj b/src/libraries/System.Composition.Hosting/pkg/System.Composition.Hosting.pkgproj
index 9948e2d60e878d..dcc53d4d65c807 100644
--- a/src/libraries/System.Composition.Hosting/pkg/System.Composition.Hosting.pkgproj
+++ b/src/libraries/System.Composition.Hosting/pkg/System.Composition.Hosting.pkgproj
@@ -4,8 +4,8 @@
     <ProjectReference Include="..\src\System.Composition.Hosting.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-
-    <HarvestIncludePaths Include="lib/netstandard1.0;lib/portable-net45+win8+wp8+wpa81" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Composition.Runtime/pkg/System.Composition.Runtime.pkgproj b/src/libraries/System.Composition.Runtime/pkg/System.Composition.Runtime.pkgproj
index d2375a1a28ca0e..c72e14fe909f7d 100644
--- a/src/libraries/System.Composition.Runtime/pkg/System.Composition.Runtime.pkgproj
+++ b/src/libraries/System.Composition.Runtime/pkg/System.Composition.Runtime.pkgproj
@@ -4,8 +4,8 @@
     <ProjectReference Include="..\src\System.Composition.Runtime.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-
-    <HarvestIncludePaths Include="lib/netstandard1.0;lib/portable-net45+win8+wp8+wpa81" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Composition.TypedParts/pkg/System.Composition.TypedParts.pkgproj b/src/libraries/System.Composition.TypedParts/pkg/System.Composition.TypedParts.pkgproj
index f247937c4e5888..e884c4bc186fb2 100644
--- a/src/libraries/System.Composition.TypedParts/pkg/System.Composition.TypedParts.pkgproj
+++ b/src/libraries/System.Composition.TypedParts/pkg/System.Composition.TypedParts.pkgproj
@@ -4,8 +4,8 @@
     <ProjectReference Include="..\src\System.Composition.TypedParts.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-
-    <HarvestIncludePaths Include="lib/netstandard1.0;lib/portable-net45+win8+wp8+wpa81" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file