Imported CMake project complains about "Using Qt Quick 1 code model instead of Qt Quick 2 M324"

When importing a very minimal CMake project into Qt Creator, the Qml text editor and designer complains about "Using Qt Quick 1 code model instead of Qt Quick 2 M324".

I have tried adding add_definitions(-DQML_IMPORT_PATH=...) which did nothing. I have also tried adding QML_IMPORT_PATH to the environment variables.

Update: I forgot to mention, that the problem can be solved by opening another project in the same Qt Creator instance, if the other project is a standard QMake project.

Update 2: I made a mistake when adding the QML_IMPORT_PATH environment variable. With this corrected, Qt Creator works as it should, but I think this should work without adding an environment variable, as it does with QMake.