$ sudo apt install build-essential pkg-config -y
$ sudo apt install xserver-xorg-dev libjson-c-dev libnotify-dev -y
$ sudo apt install libdbus-glib-1-dev -y
$ sudo apt install libsystemd-dev -y

$ ./build.sh
$ ./install.sh # then reboot :)

$ sudo vi /etc/xsm/default.rules

$ sudo journalctl -f | grep "XSM-LOG"

# Add the options to /etc/lightdm/lightdm.conf below
xserver-command=Xorg -logverbose 6 or
xserver-command=Xorg -audit 4 -logverbose 11

$ xtrace --print-offset [xclient program name]