diff --git a/cmake/QtBuild.cmake b/cmake/QtBuild.cmake
index d293c0d083a..d5eb7c22cdc 100644
--- a/cmake/QtBuild.cmake
+++ b/cmake/QtBuild.cmake
@@ -140,7 +140,7 @@ qt_configure_process_path(INSTALL_DESCRIPTIONSDIR
                          "${INSTALL_DATADIR}/modules"
                           "Module description files directory")
 
-if(CMAKE_CROSSCOMPILING AND NOT "${CMAKE_STAGING_PREFIX}" STREQUAL "")
+if(NOT "${CMAKE_STAGING_PREFIX}" STREQUAL "")
     set(QT_STAGING_PREFIX "${CMAKE_STAGING_PREFIX}")
 else()
     set(QT_STAGING_PREFIX "${CMAKE_INSTALL_PREFIX}")
diff --git a/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake b/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
index f833a66f78a..49c55815094 100644
--- a/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
+++ b/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
@@ -666,15 +666,21 @@ function(qt_compute_relative_path_from_cmake_config_dir_to_prefix)
     #
     # Similar code exists in Qt6CoreConfigExtras.cmake.in and src/corelib/CMakeLists.txt which
     # might not be needed anymore.
+    if(CMAKE_STAGING_PREFIX)
+        set(__qt_prefix "${CMAKE_STAGING_PREFIX}")
+    else()
+        set(__qt_prefix "${CMAKE_INSTALL_PREFIX}")
+    endif()
+
     if(QT_WILL_INSTALL)
         get_filename_component(clean_config_prefix
-                               "${CMAKE_INSTALL_PREFIX}/${QT_CONFIG_INSTALL_DIR}" ABSOLUTE)
+                               "${__qt_prefix}/${QT_CONFIG_INSTALL_DIR}" ABSOLUTE)
     else()
         get_filename_component(clean_config_prefix "${QT_CONFIG_BUILD_DIR}" ABSOLUTE)
     endif()
     file(RELATIVE_PATH
          qt_path_from_cmake_config_dir_to_prefix
-         "${clean_config_prefix}" "${CMAKE_INSTALL_PREFIX}")
+         "${clean_config_prefix}" "${__qt_prefix}")
      set(qt_path_from_cmake_config_dir_to_prefix "${qt_path_from_cmake_config_dir_to_prefix}"
          PARENT_SCOPE)
 endfunction()
diff --git a/cmake/QtSetup.cmake b/cmake/QtSetup.cmake
index 17b81e9d49e..85bd27a2da7 100644
--- a/cmake/QtSetup.cmake
+++ b/cmake/QtSetup.cmake
@@ -137,12 +137,9 @@ if (PROJECT_NAME STREQUAL "QtBase" AND NOT QT_BUILD_STANDALONE_TESTS)
             "Install path prefix, prepended onto install directories." FORCE)
         unset(__qt_default_prefix)
     endif()
-    if(CMAKE_CROSSCOMPILING)
+    if(CMAKE_STAGING_PREFIX)
         set(__qt_prefix "${CMAKE_STAGING_PREFIX}")
     else()
-        set(__qt_prefix "")
-    endif()
-    if(__qt_prefix STREQUAL "")
         set(__qt_prefix "${CMAKE_INSTALL_PREFIX}")
     endif()
     if(__qt_prefix STREQUAL QtBase_BINARY_DIR)