diff --git a/eng/Subsets.props b/eng/Subsets.props
index a000a8e16fac2e..8238e551141037 100644
--- a/eng/Subsets.props
+++ b/eng/Subsets.props
@@ -71,8 +71,7 @@
     <DefaultLibrariesSubsets Condition="'$(BuildTargetFramework)' == '$(NetCoreAppCurrent)' or
                                         '$(BuildTargetFramework)' == '' or
                                         '$(BuildAllConfigurations)' == 'true'">libs.native+</DefaultLibrariesSubsets>
-    <DefaultLibrariesSubsets>$(DefaultLibrariesSubsets)libs.sfx+libs.oob</DefaultLibrariesSubsets>
-    <DefaultLibrariesSubsets Condition="'$(DotNetBuildFromSource)' != 'true'">$(DefaultLibrariesSubsets)+libs.pretest</DefaultLibrariesSubsets>
+    <DefaultLibrariesSubsets>$(DefaultLibrariesSubsets)libs.sfx+libs.oob+libs.pretest</DefaultLibrariesSubsets>
 
     <DefaultHostSubsets>host.native+host.tools</DefaultHostSubsets>
     <DefaultHostSubsets Condition="'$(DotNetBuildFromSource)' != 'true'">$(DefaultHostSubsets)+host.pkg+host.tests</DefaultHostSubsets>
diff --git a/eng/liveBuilds.targets b/eng/liveBuilds.targets
index a8e8fffe47011c..0583f48aed5cfe 100644
--- a/eng/liveBuilds.targets
+++ b/eng/liveBuilds.targets
@@ -49,6 +49,7 @@
     <CoreCLRCrossTargetComponentDirName Condition="'$(TargetArchitecture)' == 'arm' and '$(BuildArchitecture)' != 'arm' and '$(TargetsWindows)' == 'true'">x86</CoreCLRCrossTargetComponentDirName>
     <CoreCLRCrossTargetComponentDirName Condition="'$(TargetArchitecture)' == 'arm' and '$(BuildArchitecture)' != 'arm' and '$(TargetsLinux)' == 'true'">x64</CoreCLRCrossTargetComponentDirName>
     <CoreCLRCrossTargetComponentDirName Condition="'$(TargetArchitecture)' == 'armel' and '$(BuildArchitecture)' != 'armel' and '$(TargetsLinux)' == 'true'">x64</CoreCLRCrossTargetComponentDirName>
+    <SingleFileHostSourcePath>$(CoreCLRArtifactsPath)/corehost/singlefilehost$(ExeSuffix)</SingleFileHostSourcePath>
   </PropertyGroup>
 
   <Target Name="ResolveRuntimeFilesFromLocalBuild">
@@ -222,4 +223,18 @@
   <PropertyGroup>
     <BundledRuntimeIdentifierGraphFile>$(RuntimeIdGraphDefinitionFile)</BundledRuntimeIdentifierGraphFile>
   </PropertyGroup>
+
+  <Target Name="RewriteRuntimePackDir"
+          Condition="'$(RunningPublish)' == 'true'"
+          DependsOnTargets="ResolveRuntimeFilesFromLocalBuild"
+          BeforeTargets="ResolveRuntimePackAssets">
+      <ItemGroup>
+        <!-- Remove AspNetCore runtime pack since we don't build it locally -->
+        <ResolvedRuntimePack Remove="Microsoft.AspNetCore.App.Runtime.$(RuntimeIdentifier)" />
+
+        <ResolvedRuntimePack Update="Microsoft.NETCore.App.Runtime.$(RuntimeIdentifier)">
+          <PackageDirectory>$(MicrosoftNetCoreAppRuntimePackDir)</PackageDirectory>
+        </ResolvedRuntimePack>
+      </ItemGroup>
+  </Target>
 </Project>
diff --git a/eng/testing/tests.singlefile.targets b/eng/testing/tests.singlefile.targets
index e5f12a683a9f79..f95e1957de028f 100644
--- a/eng/testing/tests.singlefile.targets
+++ b/eng/testing/tests.singlefile.targets
@@ -16,8 +16,6 @@
     <PublishSingleFile>true</PublishSingleFile>
     <UseAppHost>true</UseAppHost>
     <SelfContained>true</SelfContained>
-    <SingleFileHostSourcePath>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'coreclr', '$(TargetOS).$(TargetArchitecture).$(Configuration)', 'corehost'))/singlefilehost</SingleFileHostSourcePath>
-    <SingleFileHostSourcePath Condition="'$(TargetOS)' == 'windows'">$(SingleFileHostSourcePath).exe</SingleFileHostSourcePath>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(TestNativeAot)' == 'true'">
diff --git a/src/coreclr/tools/Common/TypeSystem/Ecma/SymbolReader/UnmanagedPdbSymbolReader.cs b/src/coreclr/tools/Common/TypeSystem/Ecma/SymbolReader/UnmanagedPdbSymbolReader.cs
index f6e5459a59f95d..f7a7074cca5ffd 100644
--- a/src/coreclr/tools/Common/TypeSystem/Ecma/SymbolReader/UnmanagedPdbSymbolReader.cs
+++ b/src/coreclr/tools/Common/TypeSystem/Ecma/SymbolReader/UnmanagedPdbSymbolReader.cs
@@ -25,7 +25,7 @@ namespace Internal.TypeSystem.Ecma
     /// </summary>
     public abstract class UnmanagedPdbSymbolReader : PdbSymbolReader
     {
-        public static PdbSymbolReader TryOpenSymbolReaderForMetadataFile(string metadataFileName, string searchPath)
+        public static PdbSymbolReader? TryOpenSymbolReaderForMetadataFile(string metadataFileName, string searchPath)
         {
             return null;
         }
diff --git a/src/coreclr/tools/aot/ILCompiler/ILCompiler.props b/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
index 936823572cb95c..61b23fd75d112a 100644
--- a/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
+++ b/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
@@ -120,16 +120,18 @@
     <TargetSpec>$(TargetOSComponent)_$(TargetArchitectureForLocalJitBuild)_$(TargetArchitectureForSharedLibraries)</TargetSpec>
 
     <JitInterfaceLibraryName>$(LibPrefix)jitinterface_$(TargetArchitectureForSharedLibraries)$(LibSuffix)</JitInterfaceLibraryName>
+    <!-- This will be provided when using the liveBuild, and unset otherwise. -->
+    <CoreCLRArtifactsPath Condition="'$(CoreCLRArtifactsPath)' == ''">$(RuntimeBinDir)$(CrossHostArch)</CoreCLRArtifactsPath>
   </PropertyGroup>
 
   <ItemGroup>
-    <Content Include="$(RuntimeBinDir)$(CrossHostArch)/$(JitInterfaceLibraryName)"
+    <Content Include="$(CoreCLRArtifactsPath)/$(JitInterfaceLibraryName)"
       CopyToOutputDirectory="PreserveNewest"
       CopyToPublishDirectory="PreserveNewest"
       Link="%(FileName)%(Extension)"
       />
 
-    <Content Include="$(RuntimeBinDir)$(CrossHostArch)/$(LibPrefix)clrjit_*_$(TargetArchitectureForSharedLibraries)$(LibSuffix)"
+    <Content Include="$(CoreCLRArtifactsPath)/$(LibPrefix)clrjit_*_$(TargetArchitectureForSharedLibraries)$(LibSuffix)"
       CopyToOutputDirectory="PreserveNewest"
       CopyToPublishDirectory="PreserveNewest"
       Link="%(FileName)%(Extension)"
diff --git a/src/coreclr/tools/aot/crossgen2/crossgen2.csproj b/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
index 7959568995ac49..eae4b097b624b2 100644
--- a/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
+++ b/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
@@ -1,9 +1,48 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project>
+
+  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
+
   <PropertyGroup>
-    <OutputPath>$(RuntimeBinDir)/crossgen2</OutputPath>
-    <!-- The default value for macOS is false -->
-    <UseAppHost>true</UseAppHost>
-    <AppHostRuntimeIdentifier>$(Crossgen2PackageRID)</AppHostRuntimeIdentifier>
+    <OutputPath>$(RuntimeBinDir)crossgen2</OutputPath>
+    <!-- Can't use NativeAOT in source build yet https://github.com/dotnet/runtime/issues/66859 and we
+         don't want to ship using NativeAOT on MacOS -->
+    <NativeAotSupported Condition="'$(DotNetBuildFromSource)' == 'true' or '$(TargetOS)' == 'osx'">false</NativeAotSupported>
+    <!-- Trimming is not currently working, but set the appropriate feature flags for NativeAOT -->
+    <PublishTrimmed Condition="'$(NativeAotSupported)' == 'true'">true</PublishTrimmed>
+    <RuntimeIdentifiers Condition="'$(RunningPublish)' != 'true'">linux-x64;linux-musl-x64;linux-arm;linux-musl-arm;linux-arm64;linux-musl-arm64;freebsd-x64;osx-x64;osx-arm64;win-x64;win-x86;win-arm64;win-arm</RuntimeIdentifiers>
   </PropertyGroup>
+
   <Import Project="crossgen2.props" />
+
+  <PropertyGroup Condition="'$(NativeAotSupported)' != 'true'">
+    <PublishSingleFile>true</PublishSingleFile>
+    <PublishReadyToRun>true</PublishReadyToRun>
+    <!-- Disable crossgen on NetBSD, illumos and Solaris for now. This can be revisited when we have full support. -->
+    <PublishReadyToRun Condition="'$(TargetOS)'=='NetBSD' Or '$(TargetOS)'=='illumos' Or '$(TargetOS)'=='Solaris'">false</PublishReadyToRun>
+    <!-- Disable crossgen on FreeBSD when cross building from Linux. -->
+    <PublishReadyToRun Condition="'$(TargetOS)'=='FreeBSD' and '$(CrossBuild)'=='true'">false</PublishReadyToRun>
+    <PublishReadyToRunComposite>true</PublishReadyToRunComposite>
+  </PropertyGroup>
+
+  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
+
+  <PropertyGroup Condition="'$(NativeAotSupported)' == 'true'">
+    <IlcToolsPath>$(CoreCLRILCompilerDir)</IlcToolsPath>
+    <IlcToolsPath Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)'">$(CoreCLRCrossILCompilerDir)</IlcToolsPath>
+    <CppCompilerAndLinker Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' != 'windows'">clang-9</CppCompilerAndLinker>
+    <SysRoot Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' != 'windows'">$(ROOTFS_DIR)</SysRoot>
+    <IlcBuildTasksPath>$(CoreCLRILCompilerDir)netstandard/ILCompiler.Build.Tasks.dll</IlcBuildTasksPath>
+    <IlcSdkPath>$(CoreCLRAotSdkDir)</IlcSdkPath>
+    <IlcFrameworkPath>$(MicrosoftNetCoreAppRuntimePackRidLibTfmDir)</IlcFrameworkPath>
+    <IlcFrameworkNativePath>$(MicrosoftNetCoreAppRuntimePackNativeDir)</IlcFrameworkNativePath>
+    <TrimmerSingleWarn>false</TrimmerSingleWarn>
+
+    <!-- Forced by ILLink targets; we should fix the SDK -->
+    <SelfContained Condition="'$(RunningPublish)' == 'true'">true</SelfContained>
+  </PropertyGroup>
+
+  <Import Project="$(R2ROverridePath)" Condition="'$(R2ROverridePath)' != ''" />
+  <Import Project="$(CoreCLRBuildIntegrationDir)Microsoft.DotNet.ILCompiler.targets"
+          Condition="'$(NativeAotSupported)' == 'true' and '$(RunningPublish)' == 'true'" />
+
 </Project>
diff --git a/src/coreclr/tools/aot/crossgen2/crossgen2.props b/src/coreclr/tools/aot/crossgen2/crossgen2.props
index a0d31077248d59..d544530d81378e 100644
--- a/src/coreclr/tools/aot/crossgen2/crossgen2.props
+++ b/src/coreclr/tools/aot/crossgen2/crossgen2.props
@@ -68,16 +68,18 @@
     <TargetSpec>$(TargetOSComponent)_$(TargetArchitectureForLocalJitBuild)_$(TargetArchitectureForSharedLibraries)</TargetSpec>
 
     <JitInterfaceLibraryName>$(LibPrefix)jitinterface_$(TargetArchitectureForSharedLibraries)$(LibSuffix)</JitInterfaceLibraryName>
+    <!-- This will be provided when using the liveBuild, and unset otherwise. -->
+    <CoreCLRArtifactsPath Condition="'$(CoreCLRArtifactsPath)' == ''">$(RuntimeBinDir)$(CrossHostArch)</CoreCLRArtifactsPath>
   </PropertyGroup>
 
   <ItemGroup>
-    <Content Include="$(RuntimeBinDir)$(CrossHostArch)/$(JitInterfaceLibraryName)"
+    <Content Include="$(CoreCLRArtifactsPath)/$(JitInterfaceLibraryName)"
       CopyToOutputDirectory="PreserveNewest"
       CopyToPublishDirectory="PreserveNewest"
       Link="%(FileName)%(Extension)"
       />
 
-    <Content Include="$(RuntimeBinDir)$(CrossHostArch)/$(LibPrefix)clrjit_*_$(TargetArchitectureForSharedLibraries)$(LibSuffix)"
+    <Content Include="$(CoreCLRArtifactsPath)/$(LibPrefix)clrjit_*_$(TargetArchitectureForSharedLibraries)$(LibSuffix)"
       CopyToOutputDirectory="PreserveNewest"
       CopyToPublishDirectory="PreserveNewest"
       Link="%(FileName)%(Extension)"
@@ -104,7 +106,9 @@
     <DiaSymReaderTargetArch>$(TargetArchitectureForSharedLibraries)</DiaSymReaderTargetArch>
     <DiaSymReaderTargetArch Condition="'$(DiaSymReaderTargetArch)' == 'x64'">amd64</DiaSymReaderTargetArch>
     <DiaSymReaderTargetArchFileName>Microsoft.DiaSymReader.Native.$(DiaSymReaderTargetArch).dll</DiaSymReaderTargetArchFileName>
-    <DiaSymReaderTargetArchPath>$(PkgMicrosoft_DiaSymReader_Native)\runtimes\win\native\$(DiaSymReaderTargetArchFileName)</DiaSymReaderTargetArchPath>
+    <DiaSymReaderTargetArchPath Condition="'$(PkgMicrosoft_DiaSymReader_Native)' != ''">$(PkgMicrosoft_DiaSymReader_Native)\runtimes\win\native\$(DiaSymReaderTargetArchFileName)</DiaSymReaderTargetArchPath>
+    <!-- When publishing we won't have the NuGet packages, so use the copy from the build artifacts directory. -->
+    <DiaSymReaderTargetArchPath Condition="'$(PkgMicrosoft_DiaSymReader_Native)' == ''">$(CoreCLRArtifactsPath)crossgen2/$(DiaSymReaderTargetArchFileName)</DiaSymReaderTargetArchPath>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetOS)' == 'windows'">
diff --git a/src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Crossgen2.sfxproj b/src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Crossgen2.sfxproj
index 2dbe486d0538d4..8841f1ab9b3b7a 100644
--- a/src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Crossgen2.sfxproj
+++ b/src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Crossgen2.sfxproj
@@ -3,8 +3,9 @@
   <Import Project="Sdk.props" Sdk="Microsoft.DotNet.SharedFramework.Sdk" />
 
   <PropertyGroup>
-    <SkipBuild Condition="'$(RuntimeFlavor)' == 'Mono'">true</SkipBuild>
-    <PlatformPackageType>RuntimePack</PlatformPackageType>
+    <!-- Crossgen is not used for Mono, and does not currently create freebsd packages -->
+    <SkipBuild Condition="'$(RuntimeFlavor)' == 'Mono' or '$(RuntimeIdentifier)' == 'freebsd-x64'">true</SkipBuild>
+    <PlatformPackageType>ToolPack</PlatformPackageType>
     <SharedFrameworkName>$(SharedFrameworkName).Crossgen2</SharedFrameworkName>
     <PgoSuffix Condition="'$(PgoInstrument)' != ''">.PGO</PgoSuffix>
     <OverridePackageId>$(SharedFrameworkName)$(PgoSuffix).$(RuntimeIdentifier)</OverridePackageId>
@@ -13,56 +14,65 @@
     <!-- Build this pack for any RID if building from source. Otherwise, only build select RIDs. -->
     <RuntimeIdentifiers Condition="'$(DotNetBuildFromSource)' != 'true'">linux-x64;linux-musl-x64;linux-arm;linux-musl-arm;linux-arm64;linux-musl-arm64;freebsd-x64;osx-x64;osx-arm64;win-x64;win-x86;win-arm64;win-arm</RuntimeIdentifiers>
     <GenerateInstallers>false</GenerateInstallers>
-    <GetSharedFrameworkFilesForReadyToRunDependsOn>
-        AddRuntimeFilesToPackage;
-        AddFrameworkFilesToPackage
-    </GetSharedFrameworkFilesForReadyToRunDependsOn>
-    <PublishReadyToRun>true</PublishReadyToRun>
-    <!-- Disable crossgen on NetBSD, illumos and Solaris for now. This can be revisited when we have full support. -->
-    <PublishReadyToRun Condition="'$(TargetOS)'=='NetBSD' Or '$(TargetOS)'=='illumos' Or '$(TargetOS)'=='Solaris'">false</PublishReadyToRun>
-    <!-- Disable crossgen on FreeBSD when cross building from Linux. -->
-    <PublishReadyToRun Condition="'$(TargetOS)'=='FreeBSD' and '$(CrossBuild)'=='true'">false</PublishReadyToRun>
     <HostJsonTargetPath>tools/</HostJsonTargetPath>
     <PermitDllAndExeFilesLackingFileVersion>true</PermitDllAndExeFilesLackingFileVersion>
+    <!-- Publishing as single-file or NativeAOT means we can't examine the interior DLLs -->
+    <ShouldVerifyClosure>false</ShouldVerifyClosure>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <TargetOSComponent>unix</TargetOSComponent>
-    <TargetOSComponent Condition="'$(TargetOS)' == 'windows'">win</TargetOSComponent>
-    <TargetSpec>$(TargetOSComponent)-$(TargetArchitecture)</TargetSpec>
-  </PropertyGroup>
+  <Target Name="PublishCrossgen"
+          BeforeTargets="GetFilesToPackage">
 
-  <ItemGroup>
-    <NativeRuntimeAsset Include="$(CoreCLRCrossgen2Dir)crossgen2$(ExeSuffix)" TargetPath="tools/" />
-    <Reference Include="$(CoreCLRCrossgen2Dir)crossgen2.dll" />
-    <Reference Include="$(CoreCLRCrossgen2Dir)ILCompiler*.dll" />
-    <Reference Condition="'$(DotNetBuildFromSource)' != 'true'" Include="$(CoreCLRCrossgen2Dir)Microsoft.DiaSymReader.dll" />
-    <NativeRuntimeAsset Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)jitinterface_$(TargetArchitecture)$(LibSuffix)" TargetPath="tools/" />
-    <NativeRuntimeAsset Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)clrjit_win_x86_$(TargetArchitecture)$(LibSuffix)" TargetPath="tools/"  />
-    <NativeRuntimeAsset Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)clrjit_universal_arm_$(TargetArchitecture)$(LibSuffix)" TargetPath="tools/"  />
-    <NativeRuntimeAsset Condition="'$(TargetArchitecture)' == 'arm64' or  '$(TargetArchitecture)' == 'x64'" Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)clrjit_win_x64_$(TargetArchitecture)$(LibSuffix)"  TargetPath="tools/" />
-    <NativeRuntimeAsset Condition="'$(TargetArchitecture)' == 'arm64' or  '$(TargetArchitecture)' == 'x64'" Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)clrjit_unix_x64_$(TargetArchitecture)$(LibSuffix)" TargetPath="tools/" />
-    <NativeRuntimeAsset Condition="'$(TargetArchitecture)' == 'arm64' or  '$(TargetArchitecture)' == 'x64'" Include="$(CoreCLRCrossgen2Dir)$(LibPrefix)clrjit_universal_arm64_$(TargetArchitecture)$(LibSuffix)" TargetPath="tools/"  />
-    <!-- Include the native hosting layer  -->
-    <NativeRuntimeAsset Include="$(DotNetHostBinDir)/$(LibPrefix)hostfxr$(LibSuffix)" TargetPath="tools/" />
-    <NativeRuntimeAsset Include="$(DotNetHostBinDir)/$(LibPrefix)hostpolicy$(LibSuffix)" TargetPath="tools/" />
-  </ItemGroup>
+    <!-- Copy System.Private.CoreLib from the coreclr bin directory to the runtime pack directory,
+         as we always need the copy of System.Private.CoreLib that matches exactly with the runtime. -->
+    <Copy SourceFiles="$(CoreCLRArtifactsPath)System.Private.CoreLib.dll"
+          DestinationFolder="$(MicrosoftNetCoreAppRuntimePackNativeDir)"
+          SkipUnchangedFiles="true" />
+
+    <MSBuild Projects="$(RepoRoot)src/coreclr/tools/aot/crossgen2/crossgen2.csproj"
+             Properties="RunningPublish=true
+              ;RuntimeIdentifier=$(RuntimeIdentifier)
+              ;CoreCLRArtifactsPath=$(CoreCLRArtifactsPath)
+              ;R2ROverridePath=$(MSBuildThisFileDirectory)ReadyToRun.targets"
+             Targets="Restore;Publish;PublishItemsOutputGroup">
+      <Output TaskParameter="TargetOutputs"
+              ItemName="_RawCrossgenPublishFiles" />
+    </MSBuild>
 
-  <Target Name="AddRuntimeFilesToPackage" DependsOnTargets="ResolveRuntimeFilesFromLocalBuild">
     <ItemGroup>
-      <CrossgenFile Include="@(RuntimeFiles)" Condition="'%(Filename)' == 'crossgen'" />
-      <OptimizationDataFile Include="@(RuntimeFiles)" Condition="'%(Filename)' == 'StandardOptimizationData'" />
-      <ReferenceCopyLocalPaths Include="@(RuntimeFiles)" Exclude="@(CrossgenFile);@(OptimizationDataFile)" />
-      <ReferenceCopyLocalPaths TargetPath="tools/" />
+      <_CrossgenPublishFiles Include="@(_RawCrossgenPublishFiles->'%(OutputPath)')"
+                             KeepMetadata="REMOVE_ALL" />
+    </ItemGroup>
+    <ItemGroup Condition="'$(NativeAotSupported)' != 'true'">
+      <FilesToPackage Include="@(_CrossgenPublishFiles)"
+                      Exclude="*.pdb;*.h;*.lib"
+                      TargetPath="tools/" />
+    </ItemGroup>
+    <ItemGroup Condition="'$(NativeAotSupported)' == 'true'">
+      <!-- Treat all native aot assets as native runtime assets -->
+      <FilesToPackage Include="@(_CrossgenPublishFiles->Distinct())"
+                          Condition="'%(Extension)' != '.pdb'"
+                          TargetPath="tools/" />
     </ItemGroup>
   </Target>
 
-  <Target Name="AddFrameworkFilesToPackage" DependsOnTargets="ResolveLibrariesFromLocalBuild">
-    <ItemGroup>
-      <ReferenceCopyLocalPaths Include="@(LibrariesRuntimeFiles)" TargetPath="tools/" />
-    </ItemGroup>
+  <Target Name="RunPublishedCrossgen" AfterTargets="PublishCrossgen"
+          Condition="'$(TargetOs)' == '$(HostOs)' and '$(TargetArchitecture)' == '$(BuildArchitecture)'">
+    <!-- Run the published crossgen if we're not cross-compiling -->
+    <Exec Command="@(FilesToPackage) $(CoreCLRArtifactsPath)IL/System.Private.CoreLib.dll --out $(IntermediateOutputPath)S.P.C.tmp" Condition="'%(FileName)%(Extension)' == 'crossgen2$(ExeSuffix)'"
+          ConsoleToMsBuild="true">
+      <Output TaskParameter="ConsoleOutput" PropertyName="CrossgenOutput" />
+      <Output TaskParameter="ExitCode" PropertyName="CrossgenExitCode" />
+    </Exec>
+    <Error Text="Crossgen failed with code $(CrossgenExitCode), output: $(CrossgenOutput)" Condition="$(CrossgenExitCode) != 0" />
   </Target>
 
+  <PropertyGroup>
+    <TargetOSComponent>unix</TargetOSComponent>
+    <TargetOSComponent Condition="'$(TargetOS)' == 'windows'">win</TargetOSComponent>
+    <TargetSpec>$(TargetOSComponent)-$(TargetArchitecture)</TargetSpec>
+  </PropertyGroup>
+
   <Target Name="AddCrossgen2SymbolFilesToPackage" BeforeTargets="GetFilesToPackage">
     <ItemGroup>
       <_Crossgen2SymbolFilesToPackage Include="@(Reference->'$(CoreCLRArtifactsPath)PDB\%(FileName).pdb')" />
@@ -75,22 +85,8 @@
     </ItemGroup>
   </Target>
 
-  <PropertyGroup Condition="'$(TargetOS)' == 'windows'">
-    <!-- DiaSymReader for the target architecture, which is placed into the package -->
-    <_diaSymTargetArch>$(TargetArchitecture)</_diaSymTargetArch>
-    <_diaSymTargetArch Condition="'$(TargetArchitecture)' == 'x64'">amd64</_diaSymTargetArch>
-    <_diaSymReaderTargetArchPath>$(PkgMicrosoft_DiaSymReader_Native)/runtimes/win/native/Microsoft.DiaSymReader.Native.$(_diaSymTargetArch).dll</_diaSymReaderTargetArchPath>
-  </PropertyGroup>
-
-  <ItemGroup Condition="Exists('$(_diaSymReaderTargetArchPath)')">
-    <NativeRuntimeAsset Include="$(_diaSymReaderTargetArchPath)" TargetPath="tools/" />
-  </ItemGroup>
-
-  <Import Project="$(Crossgen2SdkOverridePropsPath)" />
   <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
   <Import Project="Sdk.targets" Sdk="Microsoft.DotNet.SharedFramework.Sdk" />
-  <Import Project="$(Crossgen2SdkOverrideTargetsPath)" />
-  <Import Project="ReadyToRun.targets" />
 
   <Target Name="GetFilesToPublish">
     <MSBuild Projects="$(MSBuildProjectFullPath)"
@@ -106,4 +102,5 @@
                        TargetPath="" />
     </ItemGroup>
   </Target>
+
 </Project>