https://archlinux.org/packages/extra/x86_64/qt5ct/
Arch Linux - qt5ct 1.9-1 (x86_64)
arch linux
https://packages.debian.org/source/bullseye/qt5ct
Debian -- Details of source package qt5ct in bullseye
source packagedebiandetailsbullseye
https://forum.qt.io/topic/109830/set-qt-theme-and-font-without-qt5ct
Set Qt theme and font without qt5ct | Qt Forum
Dec 22, 2019 - I use the i3 window manager and the qutebrowser web browser. I'd like to configure my preferred font face and size for Qt5 without using any graphical tools ...
setqtthemefontwithout