isEmpty(QMAKE_INCDIR_VULKAN) {
    # Pick up the VULKAN_SDK env var set by the LunarG SDK so that the Vulkan
    # headers are found out-of-the-box on typical Windows setups.
    QMAKE_INCDIR_VULKAN = $$(VULKAN_SDK)\\include

    # Do not export the include dir but resolve it on every qmake call.
    QMAKE_EXPORT_INCDIR_VULKAN = -
}