The new CMake test incorrectly flags Qt 5.11.3 as ">= 5.12".
This results in the mouse pointer not updating when on the canvas (typically keeps the horizontal sizer icon that it git from the nearest docker), transformation tool is unusable since there's no more rotate/shear/resize indicator (hopefully this isn't the case as well when actually using Qt 5.12, I didn't test).
This is for the krita/4.1 branch.