MSIX Core solution uses deprecated std::experimental::filesystem

I need to build and publish the MSIX Core solution so that I can create an installer for older versions of Windows that my users can install from a web page.
I'm following the instructions here
https://docs.microsoft.com/en-us/windows/msix/msix-core/msixcore-clickonce-solution

I have tried to build the MSIX Core 1.1 release solution using Visual Studio 2019 and Visual Studio 2017 as described on the above page but the projects in the solution use the deprecated std::experimental::filesystem namespace. I'm having trouble getting a successful build.
Will there be an update to the MSIX Core solution soon that does not use the deprecated namespace?

Also, the MsixMgrWix project in the MSIXMgr solution is not supported in VisualStudio2017 which is odd because the instructions above use VisualStudio 2017. Perhaps there is a setting in VS2017 I am unaware of that needs to be changed?

Thank you,
Brett Burgeson

Start with the linked MSIX Core ClickOnce instructions, then inspect the MSIX Core 1.1 release solution and its use of std::experimental::filesystem. Check the MsixMgrWix project in the MSIXMgr solution using the Visual Studio 2017 and 2019 configurations described. Done means the documented solution builds successfully without the deprecated namespace and the Visual Studio 2017 support discrepancy is explained or documented.