[Unit]
Description=FWS Installer (Calamares)
After=display-manager.service
Requires=display-manager.service

[Service]
Type=simple
ExecStartPre=/bin/sh -c 'DISPLAY=:0 xhost +local:root 2>/dev/null || true'
ExecStart=/usr/bin/calamares

[Install]
WantedBy=graphical.target