How to override ASP.NET Core configuration array settings using environment variables

After looking at the configuration in the debugger I found the answer.

• Serilog__WriteTo__0__Args__path (All platforms)
• Serilog:WriteTo:0:Args:path (Windows)
• Serilog--WriteTo--0--Args--path (sourced From Azure Key Vault)

Note: The Configuration in ASP.NET Core documentation now covers this.

So I need to use the array index (zero-based) as if it were a name.

Here is the screenshot of the debugger, also (thanks to Victor Hurdugaci in the comments), the unit tests are a good place to look for examples.