We have a PCVR version of our app and need to build on Windows Standalone, but when we try to build with the Meta XR Core SDK installed we get the following errors:
```
Library\PackageCache\com.meta.xr.sdk.core@2d7964560fb1\Scripts\EnvironmentDepth\DepthProviderOpenXR.cs(31,38): error CS0234: The type or namespace name 'Meta' does not exist in the namespace 'UnityEngine.XR.OpenXR.Features' (are you missing an assembly reference?)
Library\PackageCache\com.meta.xr.sdk.core@2d7964560fb1\Scripts\EnvironmentDepth\DepthProviderOpenXR.cs(40,26): error CS0246: The type or namespace name 'MetaOpenXROcclusionSubsystem' could not be found (are you missing a using directive or an assembly reference?)
```
It'd be great to be able to support this use case, thanks.
