I ran into issues following the Linux installation documentation because qt5-default is now obsolete so components are missing when you install the other qt packages and attempt a build (which fails).
After some research, I replaced the qt-related install commands with this one and I’m sharing it since it has been effective on all the machines we’ve used it on:
sudo apt install qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools
(you can replace apt with apt-get for consistency with the remaining commands in the tutorial; they both work).
