diff --git a/dtkcore.cmake b/dtkcore.cmake
index 3a7307c..95c98d4 100644
--- a/dtkcore.cmake
+++ b/dtkcore.cmake
@@ -27,6 +27,9 @@ if(UNIX AND NOT APPLE)
 endif()
 
 set (BUILD_WITH_SYSTEMD OFF CACHE BOOL "Build with systemd")
+if (BUILD_WITH_SYSTEMD)
+    add_definitions(-DBUILD_WITH_SYSTEMD)
+endif()
 
 set(CMAKE_CXX_STANDARD 17)
 
diff --git a/src/dci/private/ddcifileengine.cpp b/src/dci/private/ddcifileengine.cpp
index bf2090d..14b2a0a 100644
--- a/src/dci/private/ddcifileengine.cpp
+++ b/src/dci/private/ddcifileengine.cpp
@@ -30,14 +30,25 @@ Q_LOGGING_CATEGORY(logFE, "dtk.dci.fileengine", QtInfoMsg)
 #define DCI_FILE_SCHEME "dci:"
 #define DCI_FILE_SUFFIX ".dci"
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+std::unique_ptr<QAbstractFileEngine> DDciFileEngineHandler::create(const QString &fileName) const
+#else
 QAbstractFileEngine *DDciFileEngineHandler::create(const QString &fileName) const
+#endif
 {
     if (!fileName.startsWith(QStringLiteral(DCI_FILE_SCHEME)))
         return nullptr;
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    std::unique_ptr<DDciFileEngine> engine(new DDciFileEngine(fileName));
+#else
     DDciFileEngine *engine = new DDciFileEngine(fileName);
+#endif
+
     if (!engine->isValid()) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
         delete engine;
+#endif
         return nullptr;
     }
 
@@ -66,11 +77,16 @@ static DDciFileShared getDciFile(const QString &dciFilePath, bool usePath = true
 }
 
 DDciFileEngineIterator::DDciFileEngineIterator(QDir::Filters filters, const QStringList &nameFilters)
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    : QAbstractFileEngineIterator(nullptr, filters, nameFilters)
+#else
     : QAbstractFileEngineIterator(filters, nameFilters)
+#endif
 {
 
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
 QString DDciFileEngineIterator::next()
 {
     current = nextValid;
@@ -78,6 +94,9 @@ QString DDciFileEngineIterator::next()
 }
 
 bool DDciFileEngineIterator::hasNext() const
+#else
+bool DDciFileEngineIterator::advance()
+#endif
 {
     if (!file) {
         const auto paths = DDciFileEngine::resolvePath(path());
@@ -111,6 +130,9 @@ bool DDciFileEngineIterator::hasNext() const
             continue;
 
         nextValid = i;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+        current = nextValid;
+#endif
         return true;
     }
 
@@ -543,12 +565,24 @@ QDateTime DDciFileEngine::fileTime(QAbstractFileEngine::FileTime time) const
 }
 #endif
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+QAbstractFileEngine::IteratorUniquePtr DDciFileEngine::beginEntryList(const QString &path, QDir::Filters filters, const QStringList &filterNames)
+#else
 DDciFileEngine::Iterator *DDciFileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
+#endif
 {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    return QAbstractFileEngine::IteratorUniquePtr(new DDciFileEngineIterator(filters, filterNames));
+#else
     return new DDciFileEngineIterator(filters, filterNames);
+#endif
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+QAbstractFileEngine::IteratorUniquePtr DDciFileEngine::endEntryList()
+#else
 DDciFileEngine::Iterator *DDciFileEngine::endEntryList()
+#endif
 {
     return nullptr;
 }
diff --git a/src/dci/private/ddcifileengine_p.h b/src/dci/private/ddcifileengine_p.h
index 143365d..118b971 100644
--- a/src/dci/private/ddcifileengine_p.h
+++ b/src/dci/private/ddcifileengine_p.h
@@ -24,7 +24,11 @@ DCORE_BEGIN_NAMESPACE
 class DDciFileEngineHandler : public QAbstractFileEngineHandler
 {
 public:
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    std::unique_ptr<QAbstractFileEngine> create(const QString &fileName) const override;
+#else
     QAbstractFileEngine *create(const QString &fileName) const override;
+#endif
 };
 
 class DDciFile;
@@ -35,8 +39,12 @@ class DDciFileEngineIterator : public QAbstractFileEngineIterator
 public:
     DDciFileEngineIterator(QDir::Filters filters, const QStringList &nameFilters);
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
     QString next() override;
     bool hasNext() const override;
+#else
+    bool advance() override;
+#endif
 
     QString currentFileName() const override;
 
@@ -102,8 +110,14 @@ class DDciFileEngine : public QAbstractFileEngine
 #endif
 
     typedef DDciFileEngineIterator Iterator;
+
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    IteratorUniquePtr beginEntryList(const QString &path, QDir::Filters filters, const QStringList &filterNames) override;
+    IteratorUniquePtr endEntryList() override;
+#else
     Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames) override;
     Iterator *endEntryList() override;
+#endif
 
     qint64 read(char *data, qint64 maxlen) override;
     qint64 write(const char *data, qint64 len) override;
diff --git a/src/filesystem/dcapfsfileengine.cpp b/src/filesystem/dcapfsfileengine.cpp
index 933616b..4cefc1b 100644
--- a/src/filesystem/dcapfsfileengine.cpp
+++ b/src/filesystem/dcapfsfileengine.cpp
@@ -14,6 +14,7 @@ DCORE_BEGIN_NAMESPACE
 extern QString _d_cleanPath(const QString &path);
 extern bool _d_isSubFileOf(const QString &filePath, const QString &directoryPath);
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
 static bool capDirIteraterHasNext(QAbstractFileEngineIterator *it)
 {
     const QStringList &paths = DCapManager::instance()->paths();
@@ -28,10 +29,19 @@ static bool capDirIteraterHasNext(QAbstractFileEngineIterator *it)
         return ret;
     return DVtableHook::callOriginalFun(it, &QAbstractFileEngineIterator::hasNext);
 }
+#endif
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+std::unique_ptr<QAbstractFileEngine> DCapFSFileEngineHandler::create(const QString &fileName) const
+#else
 QAbstractFileEngine *DCapFSFileEngineHandler::create(const QString &fileName) const
+#endif
 {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    return std::unique_ptr<QAbstractFileEngine>(new DCapFSFileEngine(fileName));
+#else
     return new DCapFSFileEngine(fileName);
+#endif
 }
 
 
@@ -210,10 +220,18 @@ QStringList DCapFSFileEngine::entryList(QDir::Filters filters, const QStringList
     return QFSFileEngine::entryList(filters, filterNames);
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+QAbstractFileEngine::IteratorUniquePtr DCapFSFileEngine::beginEntryList(const QString &path, QDir::Filters filters, const QStringList &filterNames)
+#else
 QAbstractFileEngine::Iterator *DCapFSFileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
+#endif
 {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    auto ret = QFSFileEngine::beginEntryList(path, filters, filterNames);
+#else
     auto ret = QFSFileEngine::beginEntryList(filters, filterNames);
     DVtableHook::overrideVfptrFun(ret, &QAbstractFileEngineIterator::hasNext, &capDirIteraterHasNext);
+#endif
     return ret;
 }
 
diff --git a/src/filesystem/private/dcapfsfileengine_p.h b/src/filesystem/private/dcapfsfileengine_p.h
index 3a4a06b..d7a4427 100644
--- a/src/filesystem/private/dcapfsfileengine_p.h
+++ b/src/filesystem/private/dcapfsfileengine_p.h
@@ -14,7 +14,11 @@ DCORE_BEGIN_NAMESPACE
 class DCapFSFileEngineHandler : public QAbstractFileEngineHandler
 {
 public:
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    std::unique_ptr<QAbstractFileEngine> create(const QString &fileName) const override;
+#else
     QAbstractFileEngine *create(const QString &fileName) const override;
+#endif
 };
 
 class DCapFSFileEnginePrivate;
@@ -47,7 +51,11 @@ class DCapFSFileEngine : public QFSFileEngine, public DObject
     bool cloneTo(QAbstractFileEngine *target) override;
     bool setSize(qint64 size) override;
     QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const override;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+    IteratorUniquePtr beginEntryList(const QString &path, QDir::Filters filters, const QStringList &filterNames) override;
+#else
     Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames) override;
+#endif
 
     bool canReadWrite(const QString &path) const;
 };
diff --git a/src/log/LogManager.cpp b/src/log/LogManager.cpp
index 50246ff..5ff0c19 100644
--- a/src/log/LogManager.cpp
+++ b/src/log/LogManager.cpp
@@ -149,6 +149,8 @@ void DLogManager::initJournalAppender()
     Q_D(DLogManager);
     d->m_journalAppender = new JournalAppender();
     dlogger->registerAppender(d->m_journalAppender);
+#else
+    qWarning() <<  "BUILD_WITH_SYSTEMD not defined or OS not support!!";
 #endif
 }
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a42284d..bc1b5a2 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -21,9 +21,6 @@ if(LINUX)
     if("${QT_VERSION_MAJOR}" STREQUAL "5")
         pkg_check_modules(QGSettings REQUIRED IMPORTED_TARGET gsettings-qt)
     endif()
-    if(BUILD_WITH_SYSTEMD)
-        pkg_check_modules(Systemd REQUIRED IMPORTED_TARGET libsystemd)
-    endif()
 endif()
 
 find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Xml)
@@ -88,13 +85,6 @@ if(LINUX)
           )
     endif()
 
-    if(BUILD_WITH_SYSTEMD)
-        target_link_libraries(
-            ${BIN_NAME} PRIVATE
-            PkgConfig::Systemd
-        )
-    endif()
-
     target_link_libraries(
         ${BIN_NAME} PRIVATE
         Qt${QT_VERSION_MAJOR}::DBus