diff --git a/cmake/KDAB/modules/FindPySide2.cmake b/cmake/KDAB/modules/FindPySide2.cmake
index 35b60328..22c02e09 100644
--- a/cmake/KDAB/modules/FindPySide2.cmake
+++ b/cmake/KDAB/modules/FindPySide2.cmake
@@ -57,74 +57,73 @@ else()
         OUTPUT_VARIABLE PYSIDE2_BASEDIR
         OUTPUT_STRIP_TRAILING_WHITESPACE
     )
-
-    if(PYSIDE2_BASEDIR)
-        set(PYSIDE_BASEDIR ${PYSIDE2_BASEDIR} CACHE PATH "Top level install of PySide2" FORCE)
-        execute_process(
-            COMMAND ${Python3_EXECUTABLE} -c "if True:
-                import os
-                import PySide2.QtCore as QtCore
-                print(os.path.basename(QtCore.__file__).split('.', 1)[1])
-            "
-            OUTPUT_VARIABLE PYSIDE2_SUFFIX
-            OUTPUT_STRIP_TRAILING_WHITESPACE
-        )
-
-        execute_process(
-            COMMAND ${Python3_EXECUTABLE} -c "if True:
-                import os
-                import PySide2.QtCore as QtCore
-                print(';'.join(map(str, QtCore.__version_info__)))
-            "
-            OUTPUT_VARIABLE PYSIDE2_SO_VERSION
-            OUTPUT_STRIP_TRAILING_WHITESPACE
-        )
-        list(GET PYSIDE2_SO_VERSION 0 PYSIDE2_SO_MACRO_VERSION)
-        list(GET PYSIDE2_SO_VERSION 1 PYSIDE2_SO_MICRO_VERSION)
-        list(GET PYSIDE2_SO_VERSION 2 PYSIDE2_SO_MINOR_VERSION)
-        string(REPLACE ";" "." PYSIDE2_SO_VERSION "${PYSIDE2_SO_VERSION}")
-
-        if(NOT APPLE)
-            set(PYSIDE2_SUFFIX "${PYSIDE2_SUFFIX}.${PYSIDE2_SO_MACRO_VERSION}.${PYSIDE2_SO_MICRO_VERSION}")
-        else()
-            string(REPLACE ".so" "" PYSIDE2_SUFFIX ${PYSIDE2_SUFFIX})
-            set(PYSIDE2_SUFFIX "${PYSIDE2_SUFFIX}.${PYSIDE2_SO_MACRO_VERSION}.${PYSIDE2_SO_MICRO_VERSION}.dylib")
-        endif()
-
-        set(PYSIDE2_FOUND TRUE)
-        message(STATUS "PySide2 base dir:           ${PYSIDE2_BASEDIR}")
-        message(STATUS "PySide2 suffix:             ${PYSIDE2_SUFFIX}")
+    if(NOT PYSIDE2_BASEDIR)
+        message(FATAL_ERROR "The PySide2 module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
     endif()
 
-    if(PYSIDE2_FOUND)
-        #PySide
-        #===============================================================================
-        find_path(PYSIDE_INCLUDE_DIR
-            pyside.h
-            PATHS ${PYSIDE2_BASEDIR}/include ${PYSIDE_CUSTOM_PREFIX}/include/PySide2
-            NO_DEFAULT_PATH)
+    set(PYSIDE_BASEDIR ${PYSIDE2_BASEDIR} CACHE PATH "Top level install of PySide2" FORCE)
+    execute_process(
+        COMMAND ${Python3_EXECUTABLE} -c "if True:
+            import os
+            import PySide2.QtCore as QtCore
+            print(os.path.basename(QtCore.__file__).split('.', 1)[1])
+        "
+        OUTPUT_VARIABLE PYSIDE2_SUFFIX
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 
-        # Platform specific library names
-        if(MSVC)
-            set(PYSIDE_LIBRARY_BASENAMES "pyside2.abi3.lib")
-        elseif(CYGWIN)
-            set(PYSIDE_LIBRARY_BASENAMES "")
-        elseif(WIN32)
-            set(PYSIDE_LIBRARY_BASENAMES "libpyside2.${PYSIDE2_SUFFIX}")
-        else()
-            set(PYSIDE_LIBRARY_BASENAMES "libpyside2.${PYSIDE2_SUFFIX}")
-        endif()
+    execute_process(
+        COMMAND ${Python3_EXECUTABLE} -c "if True:
+            import os
+            import PySide2.QtCore as QtCore
+            print(';'.join(map(str, QtCore.__version_info__)))
+        "
+        OUTPUT_VARIABLE PYSIDE2_SO_VERSION
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    list(GET PYSIDE2_SO_VERSION 0 PYSIDE2_SO_MACRO_VERSION)
+    list(GET PYSIDE2_SO_VERSION 1 PYSIDE2_SO_MICRO_VERSION)
+    list(GET PYSIDE2_SO_VERSION 2 PYSIDE2_SO_MINOR_VERSION)
+    string(REPLACE ";" "." PYSIDE2_SO_VERSION "${PYSIDE2_SO_VERSION}")
 
-        find_file(PYSIDE_LIBRARY
-            ${PYSIDE_LIBRARY_BASENAMES}
-            PATHS ${PYSIDE2_BASEDIR} ${PYSIDE_CUSTOM_PREFIX}/lib
-            NO_DEFAULT_PATH)
-
-        find_path(PYSIDE_TYPESYSTEMS
-            typesystem_core.xml
-            PATHS ${PYSIDE2_BASEDIR}/typesystems ${PYSIDE_CUSTOM_PREFIX}/share/PySide2/typesystems
-            NO_DEFAULT_PATH)
+    if(NOT APPLE)
+        set(PYSIDE2_SUFFIX "${PYSIDE2_SUFFIX}.${PYSIDE2_SO_MACRO_VERSION}.${PYSIDE2_SO_MICRO_VERSION}")
+    else()
+        string(REPLACE ".so" "" PYSIDE2_SUFFIX ${PYSIDE2_SUFFIX})
+        set(PYSIDE2_SUFFIX "${PYSIDE2_SUFFIX}.${PYSIDE2_SO_MACRO_VERSION}.${PYSIDE2_SO_MICRO_VERSION}.dylib")
     endif()
+
+    set(PYSIDE2_FOUND TRUE)
+    message(STATUS "PySide2 base dir:           ${PYSIDE2_BASEDIR}")
+    message(STATUS "PySide2 suffix:             ${PYSIDE2_SUFFIX}")
+
+    #PySide
+    #===============================================================================
+    find_path(PYSIDE_INCLUDE_DIR
+        pyside.h
+        PATHS ${PYSIDE2_BASEDIR}/include ${PYSIDE_CUSTOM_PREFIX}/include/PySide2
+        NO_DEFAULT_PATH)
+
+    # Platform specific library names
+    if(MSVC)
+        set(PYSIDE_LIBRARY_BASENAMES "pyside2.abi3.lib")
+    elseif(CYGWIN)
+        set(PYSIDE_LIBRARY_BASENAMES "")
+    elseif(WIN32)
+        set(PYSIDE_LIBRARY_BASENAMES "libpyside2.${PYSIDE2_SUFFIX}")
+    else()
+        set(PYSIDE_LIBRARY_BASENAMES "libpyside2.${PYSIDE2_SUFFIX}")
+    endif()
+
+    find_file(PYSIDE_LIBRARY
+        ${PYSIDE_LIBRARY_BASENAMES}
+        PATHS ${PYSIDE2_BASEDIR} ${PYSIDE_CUSTOM_PREFIX}/lib
+        NO_DEFAULT_PATH)
+
+    find_path(PYSIDE_TYPESYSTEMS
+        typesystem_core.xml
+        PATHS ${PYSIDE2_BASEDIR}/typesystems ${PYSIDE_CUSTOM_PREFIX}/share/PySide2/typesystems
+        NO_DEFAULT_PATH)
 endif()
 
 if(PYSIDE2_FOUND)
diff --git a/cmake/KDAB/modules/FindPySide6.cmake b/cmake/KDAB/modules/FindPySide6.cmake
index de31a54a..5e3612ca 100644
--- a/cmake/KDAB/modules/FindPySide6.cmake
+++ b/cmake/KDAB/modules/FindPySide6.cmake
@@ -32,6 +32,9 @@ execute_process(
     OUTPUT_VARIABLE PYSIDE6_BASEDIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
 )
+if(NOT PYSIDE6_BASEDIR)
+    message(FATAL_ERROR "The PySide6 module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
+endif()
 
 if(PYSIDE6_BASEDIR)
     set(PYSIDE_BASEDIR ${PYSIDE6_BASEDIR} CACHE PATH "Top level install of PySide6" FORCE)
diff --git a/cmake/KDAB/modules/FindShiboken2.cmake b/cmake/KDAB/modules/FindShiboken2.cmake
index 30ac56b6..6c4bf23d 100644
--- a/cmake/KDAB/modules/FindShiboken2.cmake
+++ b/cmake/KDAB/modules/FindShiboken2.cmake
@@ -50,6 +50,9 @@ else()
         OUTPUT_VARIABLE SHIBOKEN_GENERATOR_BASEDIR
         OUTPUT_STRIP_TRAILING_WHITESPACE
     )
+    if(NOT SHIBOKEN_GENERATOR_BASEDIR)
+        message(FATAL_ERROR "The shiboken2_generator module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
+    endif()
     execute_process(
         COMMAND ${Python3_EXECUTABLE} -c "if True:
             import os
@@ -62,6 +65,9 @@ else()
         OUTPUT_VARIABLE SHIBOKEN_BASEDIR
         OUTPUT_STRIP_TRAILING_WHITESPACE
     )
+    if(NOT SHIBOKEN_BASEDIR)
+        message(FATAL_ERROR "The shiboken2 module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
+    endif()
     execute_process(
         COMMAND ${Python3_EXECUTABLE} -c "if True:
             import os
diff --git a/cmake/KDAB/modules/FindShiboken6.cmake b/cmake/KDAB/modules/FindShiboken6.cmake
index e7b2f564..825db823 100644
--- a/cmake/KDAB/modules/FindShiboken6.cmake
+++ b/cmake/KDAB/modules/FindShiboken6.cmake
@@ -27,6 +27,9 @@ execute_process(
     OUTPUT_VARIABLE SHIBOKEN_GENERATOR_BASEDIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
 )
+if(NOT SHIBOKEN_GENERATOR_BASEDIR)
+  message(FATAL_ERROR "The shiboken6_generator module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
+endif()
 execute_process(
     COMMAND ${Python3_EXECUTABLE} -c "if True:
         import os
@@ -39,6 +42,9 @@ execute_process(
     OUTPUT_VARIABLE SHIBOKEN_BASEDIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
 )
+if(NOT SHIBOKEN_BASEDIR)
+  message(FATAL_ERROR "The shiboken6 module could not be imported. Make sure you have it installed by checking the output of \"pip${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR} list\"")
+endif()
 execute_process(
     COMMAND ${Python3_EXECUTABLE} -c "if True:
         import os
diff --git a/cmake/KDAB/modules/PySide2ModuleBuild.cmake b/cmake/KDAB/modules/PySide2ModuleBuild.cmake
index 1d61402d..daee7d2b 100644
--- a/cmake/KDAB/modules/PySide2ModuleBuild.cmake
+++ b/cmake/KDAB/modules/PySide2ModuleBuild.cmake
@@ -16,9 +16,9 @@ if(WIN32)
 else()
     set(PATH_SEP ":")
 endif()
-if(NOT CMAKE_CXX_STANDARD)
-    set(CMAKE_CXX_STANDARD 17)
-endif()
+#Qt5 requires C++14
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # On macOS, check if Qt is a framework build. This affects how include paths should be handled.
 get_target_property(QtCore_is_framework Qt5::Core FRAMEWORK)
diff --git a/cmake/KDAB/modules/PySide6ModuleBuild.cmake b/cmake/KDAB/modules/PySide6ModuleBuild.cmake
index 808c0183..b4eee63c 100644
--- a/cmake/KDAB/modules/PySide6ModuleBuild.cmake
+++ b/cmake/KDAB/modules/PySide6ModuleBuild.cmake
@@ -16,9 +16,9 @@ if(WIN32)
 else()
     set(PATH_SEP ":")
 endif()
-if(NOT CMAKE_CXX_STANDARD)
-    set(CMAKE_CXX_STANDARD 17)
-endif()
+#Qt6 requires C++17
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # On macOS, check if Qt is a framework build. This affects how include paths should be handled.
 get_target_property(QtCore_is_framework Qt6::Core FRAMEWORK)