diff --git a/eng/tools/GenerateFiles/Directory.Build.targets.in b/eng/tools/GenerateFiles/Directory.Build.targets.in
index a944a12cbd8a..26dfad97a0e8 100644
--- a/eng/tools/GenerateFiles/Directory.Build.targets.in
+++ b/eng/tools/GenerateFiles/Directory.Build.targets.in
@@ -64,7 +64,8 @@
 
   <ItemGroup>
     <!-- Use the same NETCore shared framework as repo built against except when building product code in servicing. -->
-    <KnownFrameworkReference Update="Microsoft.NETCore.App">
+    <!-- We cannot use live shims when building tool packs in VMR - only package for current arch is available. -->
+    <KnownFrameworkReference Update="Microsoft.NETCore.App" Condition=" '$(DotNetBuild)' != 'true' OR '$(PackAsToolShimRuntimeIdentifiers)' == '' ">
       <LatestRuntimeFrameworkVersion
           Condition=" '%(TargetFramework)' == '${DefaultNetCoreTargetFramework}' ">${MicrosoftNETCoreAppRuntimeVersion}</LatestRuntimeFrameworkVersion>
       <TargetingPackVersion
@@ -83,7 +84,8 @@
       <RuntimePackRuntimeIdentifiers Condition="'$(DotNetBuild)' == 'true'">%(RuntimePackRuntimeIdentifiers);$(TargetRuntimeIdentifier)</RuntimePackRuntimeIdentifiers>
     </KnownFrameworkReference>
 
-    <KnownAppHostPack Update="Microsoft.NETCore.App">
+    <!-- We cannot use live shims when building tool packs in VMR - only package for current arch is available. -->
+    <KnownAppHostPack Update="Microsoft.NETCore.App" Condition=" '$(DotNetBuild)' != 'true' OR '$(PackAsToolShimRuntimeIdentifiers)' == '' ">
       <AppHostPackVersion
         Condition=" '%(TargetFramework)' == '${DefaultNetCoreTargetFramework}' ">${MicrosoftNETCoreAppRuntimeVersion}</AppHostPackVersion>
       <AppHostRuntimeIdentifiers Condition=" '$(DotNetBuildSourceOnly)' == 'true' ">$(TargetRuntimeIdentifier)</AppHostRuntimeIdentifiers>
diff --git a/src/Tools/Directory.Build.targets b/src/Tools/Directory.Build.targets
index e466dde83950..4fee2dad60e6 100644
--- a/src/Tools/Directory.Build.targets
+++ b/src/Tools/Directory.Build.targets
@@ -1,9 +1,7 @@
 <Project>
   <PropertyGroup Condition=" '$(PackAsTool)' == 'true' ">
     <!-- Microsoft tool packages are required to target both x64 and x86. -->
-    <!-- In VMR builds we only use the current RID. -->
-    <PackAsToolShimRuntimeIdentifiers Condition=" '$(IsShippingPackage)' == 'true' AND '$(DotNetBuild)' != 'true' ">win-x64;win-x86</PackAsToolShimRuntimeIdentifiers>
-    <PackAsToolShimRuntimeIdentifiers Condition=" '$(IsShippingPackage)' == 'true' AND '$(DotNetBuild)' == 'true' AND '$(TargetOsName)' == 'win' ">$(TargetRid)</PackAsToolShimRuntimeIdentifiers>
+    <PackAsToolShimRuntimeIdentifiers Condition=" '$(IsShippingPackage)' == 'true' AND ('$(DotNetBuild)' != 'true' OR '$(TargetOsName)' == 'win')">win-x64;win-x86</PackAsToolShimRuntimeIdentifiers>
     <!-- None of the tool projects are project reference providers. -->
     <IsProjectReferenceProvider>false</IsProjectReferenceProvider>
     <!--