[REG] WrapVulkanHeaders::WrapVulkanHeaders not found on system without Vulkan development package

~/RTA/qt5/Examples/Qt-6.2.0/webengine/recipebrowser$ cmake CMakeLists.txt 
-- The CXX compiler identification is GNU 9.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE  
-- Check if linker can resolve circular dependencies - FALSE
-- Performing Test HAVE_STDATOMIC
-- Performing Test HAVE_STDATOMIC - Success
-- Found WrapAtomic: TRUE  
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so   
-- Found WrapOpenGL: TRUE  
-- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
-- Found XKB: /usr/lib/x86_64-linux-gnu/libxkbcommon.so (found suitable version "0.10.0", minimum required is "0.5.0") 
-- Found OpenSSL: /usr/lib/x86_64-linux-gnu/libcrypto.so (found version "1.1.1f")  
-- Found WrapOpenSSLHeaders: /usr/include (found version "1.1.1f") 
-- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
-- Configuring done
CMake Error at /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:523 (add_executable):
  Target "recipebrowser" links to target
  "WrapVulkanHeaders::WrapVulkanHeaders" but the target was not found.
  Perhaps a find_package() call is missing for an IMPORTED target, or an
  ALIAS target is missing?
Call Stack (most recent call first):
  /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:488 (_qt_internal_create_executable)
  /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:754 (qt6_add_executable)
  CMakeLists.txt:23 (qt_add_executable)
CMake Error at /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:523 (add_executable):
  Target "recipebrowser" links to target
  "WrapVulkanHeaders::WrapVulkanHeaders" but the target was not found.
  Perhaps a find_package() call is missing for an IMPORTED target, or an
  ALIAS target is missing?
Call Stack (most recent call first):
  /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:488 (_qt_internal_create_executable)
  /home/johanna/RTA/qt5/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:754 (qt6_add_executable)
  CMakeLists.txt:23 (qt_add_executable)
-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.