I am trying to introduce the .NET NativeAOT ilc.exe compiler into the build process of my compiler. For this, I am currently calling it with the following arguments:

ilc in.dll -o out.exe

To get access to a complete version of ilc.exe, I have built the .NET runtime from source. The build directory containing the tool also contains the full runtime needed for NativeAOT, including a 14 megabyte System.PrivateCoreLib.dll. Still, running the above command results in the following error message:

Error: System module System.Private.CoreLib does not exists. Make sure that you specify --systemmodule

What is the correct way of specifying the system module?