Qt-switch is a project mainly written in Shell, it's free.
Switch between multiple installed versions of qt (for archlinux users)
This utility designed for archlinux users switches between multiple parallel installed versions of Qt.
source ./qt-switch
In addition to finding the current qt package from the community repo, it looks for
installed packages named qt-stable-*, which correspond to a version of Qt installed in
/opt/qt-stable-*
The script sets the relevant environment variables, so it must be sourced not executed.
Based on a more complicated and buggy version from https://github.com/friesoft/archlinux-friesoft-qt-switcher/blob/master/qt-switcher