[Unit]
Description=NMCLI Setup service
After=network.target
ConditionPathExists=!/etc/default/nmcli_setup

[Service]
Type=oneshot
ExecStart=/usr/local/bin/nmcli_setup
ExecStartPost=/usr/bin/touch /etc/default/nmcli_setup
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target