SUMMARY While looking into bug 485133 I found out that qtchooser still defaults to qt6 on current KDE Neon. I had to execute this to make it default to qt6: sudo mkdir -p /etc/xdg/qtchooser sudo ln -s /usr/share/qtchooser/qt6-x86_64-linux-gnu.conf /etc/xdg/qtchooser/default.conf Shouldn't that be the default for Neon 6? STEPS TO REPRODUCE 1. Execute qmake --version OBSERVED RESULT qmake: could not exec '/usr/lib/qt5/bin/qmake': No such file or directory EXPECTED RESULT QMake version 3.1 Using Qt version 6.6.3 in /usr/lib/x86_64-linux-gnu SOFTWARE/OS VERSIONS Operating System: KDE neon 6.0 KDE Plasma Version: 6.0.3 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.3 Kernel Version: 6.5.0-26-generic (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i5-6300U CPU @ 2.40GHz Memory: 7,6 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 520 Manufacturer: LENOVO Product Name: 20F5S1H800 System Version: ThinkPad X260