The Debian package seems broken, only qt5 xcb-plugin-1.1-1 is available.
$this->bbcode_second_pass_code('', '
[alarm@raspberrypi3 ~]$ sudo pacman -S deepin
:: There are 1 member in group deepin:
:: Repository community
1) qt5dxcb-plugin
Enter a selection (default=all):
')