Building with recent CMakeLists.txt

Is there any trick i have to do before linking with FEBio_SDK or are there any Cmake variables missing?
When i try to compile the plugin doesnt find the fecore directory:

[ 33%] Building CXX object CMakeFiles/vtk_callback.dir/src/callback.cpp.o
FEBioVTK/src/callback.cpp:1:10: fatal error: FECore/sdk.h: No such file or directory
    1 | #include <FECore/sdk.h>

best regards,

steffen