diff --git a/builds/85996-modified.patch b/builds/85996-modified.patch
new file mode 100644
index 000000000000..20273448cebc
--- /dev/null
+++ b/builds/85996-modified.patch
@@ -0,0 +1,100 @@
+From c11fa2be22891658a849b9320664057a7c433487 Mon Sep 17 00:00:00 2001
+From: Filip Navara <navara@emclient.com>
+Date: Tue, 9 May 2023 19:20:19 +0200
+Subject: [PATCH] Update ILCompiler paths to handle
+ PublishAotUsingRuntimePack=true
+
+---
+ .../Microsoft.NETCore.Native.Publish.targets  |  4 +--
+ .../Microsoft.NETCore.Native.Unix.targets     | 10 +++----
+ .../Microsoft.NETCore.Native.targets          | 27 ++++++++++++++-----
+ 3 files changed, 28 insertions(+), 13 deletions(-)
+
+diff --git a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Publish.targets b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Publish.targets
+index 6f672918b33e0..be1fbde77efc9 100644
+--- a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Publish.targets
++++ b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Publish.targets
+@@ -70,8 +70,8 @@
+       Text="Add a PackageReference for '$(_hostPackageName)' to allow cross-compilation for $(_targetArchitecture)" />
+ 
+     <!-- NativeAOT runtime pack assemblies need to be defined to avoid the default CoreCLR implementations being set as compiler inputs -->
+-    <Error Condition="'@(PrivateSdkAssemblies)' == ''" Text="The PrivateSdkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />
+-    <Error Condition="'@(FrameworkAssemblies)' == ''" Text="The FrameworkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />
++    <Error Condition="'@(PrivateSdkAssemblies)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'" Text="The PrivateSdkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />
++    <Error Condition="'@(FrameworkAssemblies)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'" Text="The FrameworkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />
+ 
+     <ComputeManagedAssembliesToCompileToNative
+       Assemblies="@(_ResolvedCopyLocalPublishAssets)"
+diff --git a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
+index bb457c8c166bc..6b6b59ab7967b 100644
+--- a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
++++ b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
+@@ -53,11 +53,11 @@ The .NET Foundation licenses this file to you under the MIT license.
+ 
+     <ItemGroup>
+       <NativeLibrary Condition="'$(IlcMultiModule)' == 'true'" Include="$(SharedLibrary)" />
+-      <NativeLibrary Condition="'$(NativeLib)' == '' and '$(CustomNativeMain)' != 'true'" Include="$(IlcSdkPath)libbootstrapper.a" />
+-      <NativeLibrary Condition="'$(NativeLib)' != '' or '$(CustomNativeMain)' == 'true'" Include="$(IlcSdkPath)libbootstrapperdll.a" />
+-      <NativeLibrary Include="$(IlcSdkPath)$(FullRuntimeName).a" />
+-      <NativeLibrary Include="$(IlcSdkPath)$(EventPipeName)$(LibFileExt)" />
+-      <NativeLibrary Condition="'$(LinkStandardCPlusPlusLibrary)' != 'true' and '$(StaticICULinking)' != 'true'" Include="$(IlcSdkPath)libstdc++compat.a" />
++      <NativeLibrary Condition="'$(NativeLib)' == '' and '$(CustomNativeMain)' != 'true'" Include="$(IlcFrameworkSdkPath)libbootstrapper.a" />
++      <NativeLibrary Condition="'$(NativeLib)' != '' or '$(CustomNativeMain)' == 'true'" Include="$(IlcFrameworkSdkPath)libbootstrapperdll.a" />
++      <NativeLibrary Include="$(IlcFrameworkSdkPath)$(FullRuntimeName).a" />
++      <NativeLibrary Include="$(IlcFrameworkSdkPath)$(EventPipeName)$(LibFileExt)" />
++      <NativeLibrary Condition="'$(LinkStandardCPlusPlusLibrary)' != 'true' and '$(StaticICULinking)' != 'true'" Include="$(IlcFrameworkSdkPath)libstdc++compat.a" />
+     </ItemGroup>
+ 
+     <ItemGroup>
+diff --git a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.targets b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.targets
+index fbcadcc71b597..afa1cc1a66b9f 100644
+--- a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.targets
++++ b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.targets
+@@ -126,26 +126,41 @@ The .NET Foundation licenses this file to you under the MIT license.
+ 
+   <!-- The properties below need to be defined only after we've found the correct runtime package reference -->
+   <Target Name="SetupProperties" DependsOnTargets="$(IlcSetupPropertiesDependsOn)" BeforeTargets="Publish">
++    <ItemGroup>
++      <_NETCoreAppFrameworkReference Include="@(ResolvedFrameworkReference)" Condition="'%(ResolvedFrameworkReference.RuntimePackName)' == 'Microsoft.NETCore.App.Runtime.NativeAOT.$(RuntimeIdentifier)'" />
++    </ItemGroup>
++
+     <PropertyGroup>
+       <!-- Define paths used in build targets to point to the runtime-specific ILCompiler implementation -->
+       <IlcToolsPath Condition="'$(IlcToolsPath)' == ''">$(IlcHostPackagePath)\tools\</IlcToolsPath>
+       <IlcSdkPath Condition="'$(IlcSdkPath)' == ''">$(RuntimePackagePath)\sdk\</IlcSdkPath>
+-      <IlcFrameworkPath Condition="'$(IlcFrameworkPath)' == ''">$(RuntimePackagePath)\framework\</IlcFrameworkPath>
+-      <IlcFrameworkNativePath Condition="'$(IlcFrameworkNativePath)' == ''">$(RuntimePackagePath)\framework\</IlcFrameworkNativePath>
++      <IlcFrameworkPath Condition="'$(IlcFrameworkPath)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'">$(RuntimePackagePath)\framework\</IlcFrameworkPath>
++      <_NETCoreAppRuntimePackPath>%(_NETCoreAppFrameworkReference.RuntimePackPath)/runtimes/$(RuntimeIdentifier)/</_NETCoreAppRuntimePackPath>
++      <IlcFrameworkNativePath Condition="'$(IlcFrameworkNativePath)' == '' and '$(PublishAotUsingRuntimePack)' == 'true'">$(_NETCoreAppRuntimePackPath)\native\</IlcFrameworkNativePath>
++      <IlcFrameworkNativePath Condition="'$(IlcFrameworkNativePath)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'">$(RuntimePackagePath)\framework\</IlcFrameworkNativePath>
++      <IlcFrameworkSdkPath Condition="'$(IlcFrameworkSdkPath)' == '' and '$(PublishAotUsingRuntimePack)' == 'true'">$(IlcFrameworkNativePath)</IlcFrameworkSdkPath>
++      <IlcFrameworkSdkPath Condition="'$(IlcFrameworkSdkPath)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'">$(IlcSdkPath)</IlcFrameworkSdkPath>
+       <IlcMibcPath Condition="'$(IlcMibcPath)' == ''">$(RuntimePackagePath)\mibc\</IlcMibcPath>
+     </PropertyGroup>
+ 
+-    <ItemGroup>
+-      <PrivateSdkAssemblies Include="$(IlcSdkPath)*.dll" />
++    <ItemGroup Condition="'$(PublishAotUsingRuntimePack)' == 'true'">
++      <PrivateSdkAssemblies Include="$(IlcFrameworkSdkPath)*.dll"/>
++      <FrameworkAssemblies Include="@(RuntimePackAsset)" Condition="'%(Extension)' == '.dll'" />
++      <DefaultFrameworkAssemblies Include="@(FrameworkAssemblies)" />
++    </ItemGroup>
+ 
++    <ItemGroup Condition="'$(PublishAotUsingRuntimePack)' != 'true'">
++      <PrivateSdkAssemblies Include="$(IlcFrameworkSdkPath)*.dll"/>
+       <!-- Exclude unmanaged dlls -->
+       <FrameworkAssemblies Include="$(IlcFrameworkPath)*.dll" Exclude="$(IlcFrameworkPath)*.Native.dll;$(IlcFrameworkPath)msquic.dll" />
+ 
+-      <MibcFile Include="$(IlcMibcPath)*.mibc" Condition="'$(IlcPgoOptimize)' == 'true'" />
+-
+       <DefaultFrameworkAssemblies Include="@(FrameworkAssemblies)" />
+       <DefaultFrameworkAssemblies Include="@(PrivateSdkAssemblies)" />
+     </ItemGroup>
++
++    <ItemGroup>
++      <MibcFile Include="$(IlcMibcPath)*.mibc" Condition="'$(IlcPgoOptimize)' == 'true'" />
++    </ItemGroup>
+   </Target>
+ 
+   <Target Name="ComputeIlcCompileInputs" DependsOnTargets="$(IlcDynamicBuildPropertyDependencies)" BeforeTargets="Publish">
diff --git a/builds/Makefile b/builds/Makefile
index 34513b7a54de..53b106beca42 100644
--- a/builds/Makefile
+++ b/builds/Makefile
@@ -103,6 +103,15 @@ dotnet-install.sh: Makefile
 fix-maccatalyst-assembly/bin/Debug/fix-maccatalyst-assembly.exe: $(wildcard fix-maccatalyst-assembly/*.cs*) Makefile
 	$(Q) $(SYSTEM_MSBUILD) "/bl:$@.binlog" /r fix-maccatalyst-assembly/fix-maccatalyst-assembly.csproj $(MSBUILD_VERBOSITY)
 
+apply-filip-patch:
+	$(Q) $(MAKE) .stamp-apply-filip-patch-$(DOTNET_VERSION)
+
+.stamp-apply-filip-patch-$(DOTNET_VERSION):
+	$(Q) cd $(abspath $(TOP)/packages/microsoft.dotnet.ilcompiler/$(BUNDLED_NETCORE_PLATFORMS_PACKAGE_VERSION)/build)                 && git init . && git config user.email "temporary@example.com" && git config user.name "Temporary" && git add . && git commit -m "Start" && cat $(CURDIR)/85996-modified.patch | git am -p 5 --ignore-space-change
+	$(Q) cd $(abspath $(TOP)/packages/runtime.osx-x64.microsoft.dotnet.ilcompiler/$(BUNDLED_NETCORE_PLATFORMS_PACKAGE_VERSION)/build) && git init . && git config user.email "temporary@example.com" && git config user.name "Temporary" && git add . && git commit -m "Start" && cat $(CURDIR)/85996-modified.patch | git am -p 5 --ignore-space-change
+	$(Q) touch $@
+	$(Q) echo "Applied Filip's fixes"
+
 define FixMacCatalystAssembly
 $(MONO_MACCATALYST_SDK_DESTDIR)/maccat-bcl/monotouch/$(1).dll: .stamp-$(MONO_BUILD_MODE)
 
@@ -161,6 +170,7 @@ package-download/all-package-references.csproj: $(TOP)/.git/HEAD $(TOP)/.git/ind
 		/bl \
 		$(DOTNET_BUILD_VERBOSITY)
 	$(MAKE) .stamp-install-custom-dotnet-runtime-workloads
+	$(Q) make apply-filip-patch
 	$(Q) touch $@
 
 .stamp-install-t4: $(TOP)/.config/dotnet-tools.json .stamp-download-dotnet-packages
diff --git a/builds/package-download/download-packages.csproj b/builds/package-download/download-packages.csproj
index 95b1db9dedec..8f391390abbd 100644
--- a/builds/package-download/download-packages.csproj
+++ b/builds/package-download/download-packages.csproj
@@ -25,6 +25,11 @@
 
     <!-- and get the emscripten workload(s) as well -->
     <PackageDownload Include="Microsoft.NET.Workload.Emscripten.net7.Manifest-$(EmscriptenManifestVersionBand)" Version="[$(Emscriptennet7WorkloadVersion)]" Condition="'$(TrackingDotNetRuntimeSeparately)' != ''" />
+
+
+    <!-- ILCompiler -->
+    <PackageDownload Include="Microsoft.DotNet.ILCompiler" Version="[$(ActualPackageVersion)]" />
+    <PackageDownload Include="Runtime.osx-x64.Microsoft.DotNet.ILCompiler" Version="[$(ActualPackageVersion)]" />
   </ItemGroup>
 
   <Import Project="all-package-references.csproj" />