Android multi ABI build, initial CMake parameters are not used for all ABIs

My build requires the settings of a third party path as cmake parameter.

I can set the parameter in QtCreator as Initial CMake parameter like this:

Or using "add path":

The result is the same for both:
CMake generates successfully for armeabi-v7a.
On building it generates cmake for arm64-v8a and fails because the variable is not set.

If I set the variable statically in CMakeLists.txt itself it works for both.