According to this CMake question on StackOverflow you should use either <package name>_ROOT variables as command line arguments or define the <package name>_DIR variables as environment variables. That's why I mostly recommend using the CMAKE_PREFIX_PATH argument on the command line call to CMake (for instance: cmake -S <sourcedir> -B <builddir> -DCMAKE_PREFIX_PATH="<Qt5 path>;<Coin3d path>;<SoQt path>" -G "<selected CMake generator>") You might omit the <SoQt path>, as in general SoQt will be installed in the Coin3d path.

The CMake build command should explicitly mention the config: cmake --build <builddir> --config Release

@magres 👆