--- CMakeLists.txt
+++ CMakeLists.txt
@@ -15,7 +15,7 @@ set(ZINT_VERSION "${ZINT_VERSION_MAJOR}.${ZINT_VERSION_MINOR}.${ZINT_VERSION_REL
 
 add_definitions(-DZINT_VERSION=\"${ZINT_VERSION}\")
 
-set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
+#set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
 
 option(ZINT_DEBUG    "Set debug compile flags"         OFF)
 option(ZINT_SANITIZE "Set sanitize compile/link flags" OFF)
@@ -25,7 +25,7 @@ option(ZINT_STATIC   "Build static library"            OFF)
 option(ZINT_USE_PNG  "Build with PNG support"          ON)
 option(ZINT_USE_QT   "Build with QT support"           ON)
 
-include(SetPaths.cmake)
+#include(SetPaths.cmake)
 
 include(CheckCXXCompilerFlag)
 include(CheckFunctionExists)
@@ -126,15 +126,15 @@
 
 check_function_exists(getopt HAVE_GETOPT)
 if(NOT HAVE_GETOPT)
-    add_subdirectory(getopt)
+    #add_subdirectory(getopt)
 endif()
 
 add_subdirectory(backend)
-add_subdirectory(frontend)
+#add_subdirectory(frontend)
 
 if(NOT ZINT_USE_QT)
     message(STATUS "Qt support was disabled for this build")
-elseif($ENV{CMAKE_PREFIX_PATH} MATCHES "6[.][0-9][.][0-9]")
+elseif(0)
     set(USE_QT6 TRUE)
     message(STATUS "Using Qt6")
     cmake_policy(SET CMP0012 NEW) # Recognize constants in if()
@@ -151,21 +151,21 @@
     else()
         message(STATUS "Could NOT find Qt6")
     endif()
 else()
-    message(STATUS "Using Qt5")
-    find_package(Qt5Widgets)
-    find_package(Qt5Gui)
-    find_package(Qt5UiTools)
-    find_package(Qt5Xml)
+    message(STATUS "Using Qt${QT_VERSION_MAJOR}")
+    find_package(
+        Qt${QT_VERSION_MAJOR}
+        COMPONENTS Gui
+        REQUIRED)
 
-    if(Qt5Widgets_FOUND AND Qt5Gui_FOUND AND Qt5UiTools_FOUND AND Qt5Xml_FOUND)
+    if(1)
         message(STATUS "Qt version: " ${Qt5Core_VERSION_STRING})
         # Old Qt does not provide QT_VERSION_MAJOR
         if (NOT QT_VERSION_MAJOR)
             string(SUBSTRING ${Qt5Core_VERSION_STRING} 0 1 QT_VERSION_MAJOR)
         endif()
         add_subdirectory(backend_qt)
-        add_subdirectory(frontend_qt)
+        # add_subdirectory(frontend_qt)
     else()
         message(STATUS "Could NOT find Qt5")
     endif()
--- backend/CMakeLists.txt
+++ backend/CMakeLists.txt
@@ -13,10 +13,10 @@
 set(zint_OUTPUT_SRCS vector.c ps.c svg.c emf.c bmp.c pcx.c gif.c png.c tif.c raster.c output.c)
 set(zint_SRCS ${zint_OUTPUT_SRCS} ${zint_COMMON_SRCS} ${zint_ONEDIM_SRCS} ${zint_POSTAL_SRCS} ${zint_TWODIM_SRCS})
 
-add_library(zint SHARED ${zint_SRCS})
-
-if(ZINT_STATIC)
-    add_library(zint-static STATIC ${zint_SRCS})
+add_library(zint ${zint_SRCS})
+set_target_properties(zint PROPERTIES DEFINE_SYMBOL ZINT_BUILD_DLL)
+if(NOT BUILD_SHARED_LIBS)
+    set_target_properties(zint PROPERTIES OUTPUT_NAME "zint-static")# ARCHIVE_OUTPUT_NAME "zint-static")
 endif()
-
+target_include_directories(zint PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
 function(zint_target_link_libraries library)
@@ -59,1 +59,1 @@
-    target_compile_definitions(zint PRIVATE DLL_EXPORT)
+    #target_compile_definitions(zint PRIVATE DLL_EXPORT)
@@ -63,7 +63,7 @@
 if(ZINT_STATIC)
     install(TARGETS zint-static ${INSTALL_TARGETS_DEFAULT_ARGS})
 endif()
-install(FILES zint.h DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
+install(FILES zint.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT Devel)
 
 if(ZINT_TEST)
     add_subdirectory(tests)
--- backend_qt/CMakeLists.txt
+++ backend_qt/CMakeLists.txt
@@ -12,7 +12,7 @@
     qt5_wrap_cpp(QZint_SRCS qzint.h)
 endif()
 
-add_library(${PROJECT_NAME} STATIC ${QZint_SRCS})
+add_library(${PROJECT_NAME} ${QZint_SRCS})
-
+set_target_properties(${PROJECT_NAME} PROPERTIES DEFINE_SYMBOL QZINT_BUILD_DLL)
 set_target_properties(${PROJECT_NAME} PROPERTIES  SOVERSION "${ZINT_VERSION_MAJOR}.${ZINT_VERSION_MINOR}"
                                         VERSION ${ZINT_VERSION})
@@ -22,5 +22,5 @@
-target_link_libraries(${PROJECT_NAME} zint Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::Gui)
+target_link_libraries(${PROJECT_NAME} PUBLIC zint Qt${QT_VERSION_MAJOR}::Gui)
 
 
 install(TARGETS ${PROJECT_NAME} ${INSTALL_TARGETS_DEFAULT_ARGS})
-install(FILES qzint.h DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
+install(FILES qzint.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT Devel)
--- backend/zint.h
+++ backend/zint.h
@@ -315,7 +315,7 @@
 #define ZINT_DEBUG_TEST         2   /* For internal test use only */
 
 #ifdef _WIN32
-#  if defined(DLL_EXPORT) || defined(PIC) || defined(_USRDLL)
+#  if defined(ZINT_BUILD_DLL)
 #    define ZINT_EXTERN __declspec(dllexport)
 #  elif defined(ZINT_DLL)
 #    define ZINT_EXTERN __declspec(dllimport)
--- backend_qt/qzint.h
+++ backend_qt/qzint.h
@@ -24,8 +25,18 @@
 
 namespace Zint
 {
-
-class QZint : public QObject
+#ifdef _WIN32
+# ifdef QZINT_BUILD_DLL
+#  define QZINT_EXTERN __declspec(dllexport)
+# elif defined(QZINT_DLL)
+#  define QZINT_EXTERN __declspec(dllimport)
+# else
+#  define QZINT_EXTERN
+# endif
+#else
+# define QZINT_EXTERN
+#endif
+class QZINT_EXTERN QZint : public QObject
 {
     Q_OBJECT