Examples not compiling due 'include/QtGui/qvulkaninstance.h:56:10: fatal error: vulkan/vulkan.h: No such file or directory'

[  6%] Automatic MOC and UIC for target rendercontrol_opengl
[ 26%] Built target rendercontrol_opengl_autogen
[ 33%] Building CXX object CMakeFiles/rendercontrol_opengl.dir/window_singlethreaded.cpp.o
In file included from /home/qt/RTA/qt5/6.0.0/gcc_64/include/QtGui/QVulkanInstance:1,
                 from /home/qt/RTA/qt5/6.0.0/gcc_64/include/QtQuick/qquickrendertarget.h:47,
                 from /home/qt/RTA/qt5/6.0.0/gcc_64/include/QtQuick/QQuickRenderTarget:1,
                 from /home/qt/RTA/qt5/Examples/Qt-6.0.0/quick/rendercontrol/rendercontrol_opengl/window_singlethreaded.cpp:67:
/home/qt/RTA/qt5/6.0.0/gcc_64/include/QtGui/qvulkaninstance.h:56:10: fatal error: vulkan/vulkan.h: No such file or directory
   56 | #include <vulkan/vulkan.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/rendercontrol_opengl.dir/build.make:137: CMakeFiles/rendercontrol_opengl.dir/window_singlethreaded.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:96: CMakeFiles/rendercontrol_opengl.dir/all] Error 2
make: *** [Makefile:149: all] Error 2