KDE plasma 6 From Terminal - WSL - How to start

Have setup this for WSL and it works well - GitHub - LGUG2Z/nixos-wsl-starter: A sane, batteries-included starter template for running NixOS on WSL

This is my setup in /etc/nixos/configuration.nix

services.xserver.enable = true;
services.xserver.displayManager.sddm.enable = true;
services.xserver.desktopManager.plasma6.enable = true;
services.xserver.displayManager.defaultSession = “plasma”;

But i cant start KDE from terminal: startplasma-wayland or startplasma-x11

What have I missed to install ?

Regards,
Mattias Vinberg