-- only allow Qt6

--- lib/CustomQt/CMakeLists.txt.orig	2026-10-08 06:26:04 UTC
+++ lib/CustomQt/CMakeLists.txt
@@ -22,7 +22,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 # Legacy Qt5 (pre 5.15) support as suggested by teh Qt Documentation:
 # https://doc.qt.io/qt-6/cmake-qt5-and-qt6-compatibility.html#supporting-older-qt-5-versions
-find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core Widgets)
+find_package(QT NAMES Qt6 REQUIRED COMPONENTS Core Widgets)
 find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core Widgets)
 
 set(CMAKE_AUTOMOC ON)