diff --git a/CMakeLists.txt b/CMakeLists.txt
index a480e4a9..ef3465be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,9 +7,6 @@ project(zint-package)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-#set(CMAKE_VERBOSE_MAKEFILE ON)
-#comment or remove the above line before release
-
 set(ZINT_VERSION_MAJOR 2)
 set(ZINT_VERSION_MINOR 9)
 set(ZINT_VERSION_RELEASE 1)
@@ -126,6 +123,7 @@ elseif($ENV{CMAKE_PREFIX_PATH} MATCHES "6[.][0-9][.][0-9]")
     find_package(Qt6Xml)
 
     if(Qt6Widgets_FOUND AND Qt6Gui_FOUND AND Qt6UiTools_FOUND AND Qt6Xml_FOUND)
+        message(STATUS "Qt version: " ${Qt6Core_VERSION_MAJOR}.${Qt6Core_VERSION_MINOR}.${Qt6Core_VERSION_PATCH})
         add_subdirectory(backend_qt)
         add_subdirectory(frontend_qt)
     else()
diff --git a/backend/tests/CMakeLists.txt b/backend/tests/CMakeLists.txt
index 7e88a013..9fc91d25 100644
--- a/backend/tests/CMakeLists.txt
+++ b/backend/tests/CMakeLists.txt
@@ -3,7 +3,7 @@
 # Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
 # vim: set ts=4 sw=4 et :
 
-cmake_minimum_required(VERSION 3.18)
+cmake_minimum_required(VERSION 3.9)
 project(zint_backend_tests)
 
 enable_testing()
@@ -11,10 +11,12 @@ enable_testing()
 include(${zint-package_SOURCE_DIR}/cmake/zint_add_test.cmake)
 
 set(BWIPP_TAR ${CMAKE_CURRENT_SOURCE_DIR}/tools/bwipp_dump.ps.tar.xz)
-set(BWIPP_PS ${CMAKE_BINARY_SOURCE_DIR}/tools/bwipp_dump.ps)
+set(BWIPP_PS ${CMAKE_CURRENT_BINARY_DIR}/tools/bwipp_dump.ps)
 
 if(NOT EXISTS ${BWIPP_PS})
-    file(ARCHIVE_EXTRACT INPUT ${BWIPP_TAR} DESTINATION tools)
+    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/tools)
+    execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xf ${BWIPP_TAR}
+                    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/tools)
 endif()
 
 set(testcommon_SRCS testcommon.c testcommon.h)