cmake for QtCreator fails

[YamiTheWitch]

Following the tutorial at https://github.com/qt-creator/qt-creator/blob/master/README.md#compiling-qt-creator
I got until the point where it tells you to run the command:

cmake -DCMAKE_BUILD_TYPE=Debug -G Ninja "-DCMAKE_PREFIX_PATH=/path/to/Qt;/path/to/llvm" /path/to/qtcreator_sources

cmake stops with the following error code:

-- Could NOT find Qt6Core5Compat (missing: Qt6Core5Compat_DIR)
CMake Error at CMakeLists.txt:71 (find_package):
  Found package configuration file:

    /usr/local/Qt-6.9.0/lib/cmake/Qt6/Qt6Config.cmake

  but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
  FOUND.  Reason given by package:

  Failed to find required Qt component "Core5Compat".

  Expected Config file at
  "/usr/local/Qt-6.9.0/lib/cmake/Qt6Core5Compat/Qt6Core5CompatConfig.cmake"
  does NOT exist

[hskoglund]

Hi, try running the MaintenanceTool again and go into Additional Libraries: