MyBuildTool.Package.csproj

<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<TargetFramework>netstandard2.0</TargetFramework>
		<PackageID>MyBuildTool</PackageID>
		<IncludeBuildOutput>false</IncludeBuildOutput>
		<NoWarn>$(NoWarn);NU1702;MSB3270;NU5128</NoWarn>
		
		<ProduceReferenceAssembly>true</ProduceReferenceAssembly>
	</PropertyGroup>

	<ItemGroup>
		<ProjectReference Include="...\MyBuildTool\MyBuildTool.csproj" PrivateAssets="all" />
	</ItemGroup>

	<Target Name="BuildOtherAssemblies" AfterTargets="ResolveAssemblyReferences" DependsOnTargets="ResolveAssemblyReferences">
		<ItemGroup>
			<OtherAssemblies Include="@(ReferenceCopyLocalPaths->WithMetadataValue('ReferenceSourceTarget', 'ProjectReference')->WithMetadataValue('PrivateAssets', 'all'))" />
			<MyBuildToolOutputFiles Include="%(OtherAssemblies.RelativeDir)\*.*" />
		</ItemGroup>
		<ItemGroup>
			<Content Include="@(MyBuildToolOutputFiles)" CopyToOutputDirectory="PreserveNewest">
				<Link>%(FileName)%(Extension)</Link>
				<Pack>true</Pack>
				<PackageCopyToOutput>true</PackageCopyToOutput>
				<PackagePath>contentFiles\any\any\MyBuildTool</PackagePath>
			</Content>
		</ItemGroup>
	</Target>

</Project>