How do I select the Active Input Handler in command line build

How do I select the active input handler (player preference setting) when doing a command line build?

I have a number of build scripts for the same project. One of them needs the old input system as the new input system caused problems.

If I have both systems selected then controller joystick and dPad don't work properly in Windows.

I if have just new system selected then in 2019.4 the Webgl build won't allow keyboard input.