Example not compiling due 'quick/scenegraph/d3d11underqml/d3d11squircle.cpp:56:10: fatal error: d3d11.h: No such file or directory'

[  5%] Automatic MOC and UIC for target d3d11underqml
[ 22%] Built target d3d11underqml_autogen
[ 27%] Running Automoc file extraction
[ 27%] Built target d3d11underqml_automoc_json_extraction
[ 33%] Building CXX object CMakeFiles/d3d11underqml.dir/d3d11squircle.cpp.o
/home/qt/RTA/qt5/Examples/Qt-6.0.0/quick/scenegraph/d3d11underqml/d3d11squircle.cpp:56:10: fatal error: d3d11.h: No such file or directory
   56 | #include <d3d11.h>
      |          ^~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/d3d11underqml.dir/build.make:130: CMakeFiles/d3d11underqml.dir/d3d11squircle.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:98: CMakeFiles/d3d11underqml.dir/all] Error 2
make: *** [Makefile:149: all] Error 2