qtmqtt | Qt Module to implement MQTT protocol version

For a project which uses MQTT, I always had to compile the QtMqtt module from source, because it wasn't included in the prebuilt windows release and couldn't be chosen for installation either. In Qt5 that was pretty easy: Download source code from official git (https://code.qt.io/cgit/qt/qtmqtt.git/), open the .pro file in QtCreator and compile the project. For installation, I just moved the .dll files to my Qt install directory.

Now in Qt6, the build process was switched from qmake to cmake, so I cannot simply load the project in QtCreator, but have to compile it manually using CMake, which I find really unintuitive and prone to errors. From what I understand, I cannot compile single modules on their own from now on, but have to get the whole Qt 6.2.0 source code instead (i.e. via installer option) and then use a --target option on CMake to build only specific module. So here is what I did so far:

1. Get Qt source code from installer (installed to Qt/6.2.0/Src)
2. Create a command line environment according to this manual
3. Open cmd environment, navigate to build folder (i.e. Qt/6.2.0/build)
4. Configure build using command: ..\Src\configure -prefix Qt\6.2.0\build
5. Build with cmake using command cmake --build . --target qtmqtt
6. Install using command cmake --install .

What happens, is that the configuration works, and the build supposedly too, but installation fails with something like:

The following CMake's action will delete executable if RPATH is not the same.

While trying to install the qt mqtt module on centos, I run into a PCH problem. I am doing the steps below. But when I run the make statement, I encounter the problem. Problem is PCH files. The error output I encountered is below. Thanks in advance for those who help.