diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88c19410a..a7488d202 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@ set(KF_MIN_VERSION "6.0.0")
 set(KIDENTITYMANAGEMENT_VERSION "6.0.40")
 set(KMAILTRANSPORT_VERSION "6.0.40")
 set(AKONADI_MIME_VERSION "6.0.40")
-set(KMIME_VERSION "6.0.40")
+set(KMIME_VERSION "6.0.0")
 set(LIBKLEO_VERSION "6.0.50")
 set(QT_REQUIRED_VERSION "6.6.0")
 set(MIMETREEPARSER_VERSION "6.0.40")
diff --git a/src/kleopatraapplication.cpp b/src/kleopatraapplication.cpp
index 720b2ee4e..8b0c4be03 100644
--- a/src/kleopatraapplication.cpp
+++ b/src/kleopatraapplication.cpp
@@ -75,7 +75,7 @@
 #include <KSharedConfig>
 #include <memory>
 
-#ifdef Q_OS_WIN
+#if 0
 #include <QtPlatformHeaders/QWindowsWindowFunctions>
 #endif
 
@@ -307,7 +307,7 @@ KleopatraApplication::KleopatraApplication(int &argc, char *argv[])
 
 void KleopatraApplication::init()
 {
-#ifdef Q_OS_WIN
+#if 0
     QWindowsWindowFunctions::setWindowActivationBehavior(QWindowsWindowFunctions::AlwaysActivateWindow);
 #endif
     const auto blockedUrlSchemes = Settings{}.blockedUrlSchemes();
diff --git a/src/utils/accessibility.cpp b/src/utils/accessibility.cpp
index be7eee9f0..c1ab86db9 100644
--- a/src/utils/accessibility.cpp
+++ b/src/utils/accessibility.cpp
@@ -14,7 +14,7 @@
 #include <KLocalizedString>
 
 #include <QAction>
-#ifdef Q_OS_WIN
+#if 0
 #include <QApplication>
 #include <QDesktopWidget>
 #endif
@@ -125,7 +125,7 @@ namespace
 {
 static void notifyAccessibilityClientsAboutToolTip(const QPoint &pos, QWidget *parent)
 {
-#ifdef Q_OS_WIN
+#if 0
     // On Windows, the tool tip's parent widget is a desktop screen widget (see implementation of QToolTip::showText)
     QT_WARNING_PUSH
     QT_WARNING_DISABLE_DEPRECATED