UATHelper: Packaging (Android (ATC)): xgConsole: Runtime/Core/Public\HAL/PlatformCrt.h(6,10) : fatal error: 'wchar.h' file not found

Using the ARCore branch of UE4, when building to Android ATC, I receive this error:

UATHelper: Packaging (Android (ATC)): xgConsole: Runtime/Core/Public\HAL/PlatformCrt.h(6,10) : fatal error: ‘wchar.h’ file not found