Run nixos-rebuild build-vm --flake .#plasma or nixos-rebuild build-vm --flake .#hyprland.
nixos-rebuild build-vm --flake .#plasma
nixos-rebuild build-vm --flake .#hyprland
Then execute result/bin/run-nixos-vm -device virtio-vga.
result/bin/run-nixos-vm -device virtio-vga
You should get logged in an can start synology-drive-client.
synology-drive-client