diff --git a/classes/populate_sdk_qt6_base.bbclass b/classes/populate_sdk_qt6_base.bbclass
index 575898e..f4aa1f0 100644
--- a/classes/populate_sdk_qt6_base.bbclass
+++ b/classes/populate_sdk_qt6_base.bbclass
@@ -131,6 +131,7 @@ if(NOT DEFINED CMAKE_INSTALL_PREFIX)
   set(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT 1)
 endif()
 set(CMAKE_INSTALL_PREFIX "${prefix}" CACHE PATH "Install path prefix")
+set(QT_BUILD_INTERNALS_NO_FORCE_SET_INSTALL_PREFIX ON CACHE BOOL "")
 EOF
 
     # resolve absolute paths at runtime
diff --git a/recipes-qt/qt6/qtbase_git.bb b/recipes-qt/qt6/qtbase_git.bb
index c909806..97b72c4 100644
--- a/recipes-qt/qt6/qtbase_git.bb
+++ b/recipes-qt/qt6/qtbase_git.bb
@@ -157,6 +157,7 @@ do_install:append:class-nativesdk() {
     install -d ${D}${datadir}/cmake/OEToolchainConfig.cmake.d
     cat > ${D}${datadir}/cmake/OEToolchainConfig.cmake.d/OEQt6Toolchain.cmake <<EOF
 set(QT_HOST_PATH "\$ENV{OECORE_NATIVE_SYSROOT}/usr" CACHE PATH "")
+set(QT_BUILD_INTERNALS_NO_FORCE_SET_INSTALL_PREFIX ON CACHE BOOL "")
 EOF
 
     RELPATH="${@os.path.relpath(d.getVar('bindir'), d.getVar('QT6_INSTALL_BINDIR'))}"