diff --git a/examples/corelib/time/CMakeLists.txt b/examples/corelib/time/CMakeLists.txt
index 32b93e9ecfa..148ae5d0148 100644
--- a/examples/corelib/time/CMakeLists.txt
+++ b/examples/corelib/time/CMakeLists.txt
@@ -1,4 +1,4 @@
 # Copyright (C) 2024 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-add_subdirectory(calendarbackendplugin)
+qt_internal_add_example(calendarbackendplugin)
diff --git a/examples/corelib/time/calendarbackendplugin/CMakeLists.txt b/examples/corelib/time/calendarbackendplugin/CMakeLists.txt
index 7aa4a18a1e5..4f1702c012a 100644
--- a/examples/corelib/time/calendarbackendplugin/CMakeLists.txt
+++ b/examples/corelib/time/calendarbackendplugin/CMakeLists.txt
@@ -1,10 +1,10 @@
 # Copyright (C) 2024 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.16)
 project(JulianGregorianCalendar VERSION 0.1 LANGUAGES CXX)
 
-find_package(Qt6 REQUIRED COMPONENTS Core)
+find_package(Qt6 REQUIRED COMPONENTS Core Widgets)
 
 qt_standard_project_setup()
 
diff --git a/examples/corelib/time/calendarbackendplugin/application/CMakeLists.txt b/examples/corelib/time/calendarbackendplugin/application/CMakeLists.txt
index 3cd4ffe430c..da432fe2c75 100644
--- a/examples/corelib/time/calendarbackendplugin/application/CMakeLists.txt
+++ b/examples/corelib/time/calendarbackendplugin/application/CMakeLists.txt
@@ -1,23 +1,16 @@
 # Copyright (C) 2024 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-cmake_minimum_required(VERSION 3.5)
-project(JulianGregorianCalendar VERSION 0.1 LANGUAGES CXX)
-
-find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Core)
-find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Core)
-
-qt_standard_project_setup()
-
-include_directories(../common/)
-
 qt_add_executable(JulianGregorianCalendar
     ../common/calendarBackendInterface.h
     main.cpp
 )
 
+target_include_directories(JulianGregorianCalendar PRIVATE ../common)
+
 target_link_libraries(JulianGregorianCalendar
     PRIVATE
         Qt::Widgets
         Qt::Core
 )
+
diff --git a/examples/corelib/time/calendarbackendplugin/plugin/CMakeLists.txt b/examples/corelib/time/calendarbackendplugin/plugin/CMakeLists.txt
index bac4118b8f5..26a13b29298 100644
--- a/examples/corelib/time/calendarbackendplugin/plugin/CMakeLists.txt
+++ b/examples/corelib/time/calendarbackendplugin/plugin/CMakeLists.txt
@@ -1,16 +1,6 @@
 # Copyright (C) 2024 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-cmake_minimum_required(VERSION 3.5)
-project(calendarPlugin VERSION 0.1 LANGUAGES CXX)
-
-find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Core)
-find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Core)
-
-qt_standard_project_setup()
-
-include_directories(../common/)
-
 qt_add_library(calendarPlugin SHARED
     ../common/calendarBackendInterface.h
     calendarplugin.h
@@ -19,6 +9,8 @@ qt_add_library(calendarPlugin SHARED
     calendarbackend.h
 )
 
+target_include_directories(calendarPlugin PRIVATE ../common)
+
 target_link_libraries(calendarPlugin
     PRIVATE
         Qt::Widgets