diff --git a/cmake/QtAutoDetectHelpers.cmake b/cmake/QtAutoDetectHelpers.cmake
index c24aa2d0b00..36fb377bdba 100644
--- a/cmake/QtAutoDetectHelpers.cmake
+++ b/cmake/QtAutoDetectHelpers.cmake
@@ -178,6 +178,10 @@ function(qt_auto_detect_vcpkg)
 endfunction()
 
 function(qt_auto_detect_ios)
+    if("${QT_QMAKE_TARGET_MKSPEC}" STREQUAL "macx-ios-clang")
+        set(CMAKE_SYSTEM_NAME "iOS" CACHE STRING "")
+    endif()
+
     if(CMAKE_SYSTEM_NAME STREQUAL iOS)
         message(STATUS "Using internal CMake ${CMAKE_SYSTEM_NAME} toolchain file.")
 
@@ -472,9 +476,9 @@ macro(qt_internal_setup_autodetect)
 
     qt_auto_detect_cyclic_toolchain()
     qt_auto_detect_cmake_config()
-    qt_auto_detect_darwin()
     qt_auto_detect_macos_universal()
     qt_auto_detect_ios()
+    qt_auto_detect_darwin()
     qt_auto_detect_android()
     qt_auto_detect_pch()
     qt_auto_detect_wasm()
diff --git a/cmake/QtProcessConfigureArgs.cmake b/cmake/QtProcessConfigureArgs.cmake
index 68584dfc612..5e2b92a19cf 100644
--- a/cmake/QtProcessConfigureArgs.cmake
+++ b/cmake/QtProcessConfigureArgs.cmake
@@ -926,11 +926,6 @@ translate_string_input(android-javac-target QT_ANDROID_JAVAC_TARGET)
 
 translate_string_input(sdk QT_APPLE_SDK)
 
-if((DEFINED INPUT_xplatform AND INPUT_xplatform STREQUAL "macx-ios-clang")
-    OR (DEFINED INPUT_platform AND INPUT_platform STREQUAL "macx-ios-clang"))
-    push("-DCMAKE_SYSTEM_NAME=iOS")
-endif()
-
 drop_input(make)
 drop_input(nomake)
 translate_boolean_input(install-examples-sources QT_INSTALL_EXAMPLES_SOURCES)