I used to create dex file with dx.bat like this :
"c:\SDKs\android\build-tools\32.0.0\dx.bat" --dex --output=C:\Dev\MagicFoundation\Alcinoe\Tools\AddRJavaToClassesDex\tmp\classes.dex C:\Dev\MagicFoundation\Alcinoe\Tools\AddRJavaToClassesDex\tmp\obj.zip
How to do the same with d8.bat?