diff --git a/src/plugins/qtsupport/qscxmlcgenerator.cpp b/src/plugins/qtsupport/qscxmlcgenerator.cpp
index e345488e95a..8aa1c0198fd 100644
--- a/src/plugins/qtsupport/qscxmlcgenerator.cpp
+++ b/src/plugins/qtsupport/qscxmlcgenerator.cpp
@@ -5,6 +5,8 @@
 
 #include <qtsupport/baseqtversion.h>
 #include <qtsupport/qtkitaspect.h>
+
+#include <projectexplorer/extracompiler.h>
 #include <projectexplorer/target.h>
 
 #include <utils/qtcassert.h>
@@ -16,7 +18,7 @@
 using namespace ProjectExplorer;
 using namespace Utils;
 
-namespace QtSupport {
+namespace QtSupport::Internal {
 
 static QLoggingCategory log("qtc.qscxmlcgenerator", QtWarningMsg);
 
@@ -85,12 +87,9 @@ Tasks QScxmlcGenerator::parseIssues(const QByteArray &processStderr)
 
 FilePath QScxmlcGenerator::command() const
 {
-    QtSupport::QtVersion *version = nullptr;
-    Target *target;
-    if ((target = project()->activeTarget()))
-        version = QtSupport::QtKitAspect::qtVersion(target->kit());
-    else
-        version = QtSupport::QtKitAspect::qtVersion(KitManager::defaultKit());
+    Target *target = project()->activeTarget();
+    Kit *kit = target ? target->kit() : KitManager::defaultKit();
+    QtVersion *version = QtKitAspect::qtVersion(kit);
 
     if (!version)
         return {};
@@ -125,21 +124,28 @@ FileNameToContentsHash QScxmlcGenerator::handleProcessFinished(Process *process)
     return result;
 }
 
-FileType QScxmlcGeneratorFactory::sourceType() const
+// QScxmlcGeneratorFactory
+
+class QScxmlcGeneratorFactory final : public ExtraCompilerFactory
 {
-    return FileType::StateChart;
+public:
+    QScxmlcGeneratorFactory() = default;
+
+    FileType sourceType() const final { return FileType::StateChart; }
+
+    QString sourceTag() const final { return QStringLiteral("scxml"); }
+
+    ExtraCompiler *create(const Project *project,
+                          const FilePath &source,
+                          const FilePaths &targets) final
+    {
+        return new QScxmlcGenerator(project, source, targets, this);
+    }
+};
+
+void setupQScxmlcGenerator()
+{
+    static QScxmlcGeneratorFactory theQScxmlcGeneratorFactory;
 }
 
-QString QScxmlcGeneratorFactory::sourceTag() const
-{
-    return QStringLiteral("scxml");
-}
-
-ExtraCompiler *QScxmlcGeneratorFactory::create(
-        const Project *project, const FilePath &source,
-        const FilePaths &targets)
-{
-    return new QScxmlcGenerator(project, source, targets, this);
-}
-
-} // namespace QtSupport
+} // QtSupport::Internal
diff --git a/src/plugins/qtsupport/qscxmlcgenerator.h b/src/plugins/qtsupport/qscxmlcgenerator.h
index 9bfe8591033..811f485689d 100644
--- a/src/plugins/qtsupport/qscxmlcgenerator.h
+++ b/src/plugins/qtsupport/qscxmlcgenerator.h
@@ -3,24 +3,8 @@
 
 #pragma once
 
-#include <projectexplorer/extracompiler.h>
+namespace QtSupport::Internal {
 
-#include <utils/filepath.h>
+void setupQScxmlcGenerator();
 
-namespace QtSupport {
-
-class QScxmlcGeneratorFactory : public ProjectExplorer::ExtraCompilerFactory
-{
-public:
-    QScxmlcGeneratorFactory() = default;
-
-    ProjectExplorer::FileType sourceType() const override;
-
-    QString sourceTag() const override;
-
-    ProjectExplorer::ExtraCompiler *create(const ProjectExplorer::Project *project,
-                                           const Utils::FilePath &source,
-                                           const Utils::FilePaths &targets) override;
-};
-
-} // QtSupport
+} // QtSupport::Internal
diff --git a/src/plugins/qtsupport/qtsupportplugin.cpp b/src/plugins/qtsupport/qtsupportplugin.cpp
index cd815c63e33..c69faf4a5d9 100644
--- a/src/plugins/qtsupport/qtsupportplugin.cpp
+++ b/src/plugins/qtsupport/qtsupportplugin.cpp
@@ -48,9 +48,6 @@ namespace QtSupport::Internal {
 class QtSupportPluginPrivate
 {
 public:
-    UicGeneratorFactory uicGeneratorFactory;
-    QScxmlcGeneratorFactory qscxmlcGeneratorFactory;
-
     DesignerExternalEditor designerEditor;
     LinguistEditor linguistEditor;
 
@@ -109,6 +106,8 @@ void QtSupportPlugin::initialize()
     setupGettingStartedWelcomePage();
     setupQtSettingsPage();
     setupQtOutputFormatter();
+    setupUicGenerator();
+    setupQScxmlcGenerator();
 
     theProcessRunner() = processRunnerCallback;
 
diff --git a/src/plugins/qtsupport/uicgenerator.cpp b/src/plugins/qtsupport/uicgenerator.cpp
index 840bc585645..dee12b9f9c9 100644
--- a/src/plugins/qtsupport/uicgenerator.cpp
+++ b/src/plugins/qtsupport/uicgenerator.cpp
@@ -7,6 +7,7 @@
 #include "qtkitaspect.h"
 
 #include <projectexplorer/buildconfiguration.h>
+#include <projectexplorer/extracompiler.h>
 #include <projectexplorer/kitmanager.h>
 #include <projectexplorer/target.h>
 
@@ -19,7 +20,7 @@
 using namespace ProjectExplorer;
 using namespace Utils;
 
-namespace QtSupport {
+namespace QtSupport::Internal {
 
 class UicGenerator final : public ProcessExtraCompiler
 {
@@ -32,19 +33,16 @@ public:
     }
 
 protected:
-    FilePath command() const override;
-    QStringList arguments() const override { return {"-p"}; }
-    FileNameToContentsHash handleProcessFinished(Process *process) override;
+    FilePath command() const final;
+    QStringList arguments() const final { return {"-p"}; }
+    FileNameToContentsHash handleProcessFinished(Process *process) final;
 };
 
 FilePath UicGenerator::command() const
 {
-    QtSupport::QtVersion *version = nullptr;
-    Target *target;
-    if ((target = project()->activeTarget()))
-        version = QtSupport::QtKitAspect::qtVersion(target->kit());
-    else
-        version = QtSupport::QtKitAspect::qtVersion(KitManager::defaultKit());
+    Target *target = project()->activeTarget();
+    Kit *kit = target ? target->kit() : KitManager::defaultKit();
+    QtVersion *version = QtKitAspect::qtVersion(kit);
 
     if (!version)
         return {};
@@ -69,21 +67,28 @@ FileNameToContentsHash UicGenerator::handleProcessFinished(Process *process)
     return result;
 }
 
-FileType UicGeneratorFactory::sourceType() const
+// UicGeneratorFactory
+
+class UicGeneratorFactory final : public ExtraCompilerFactory
 {
-    return FileType::Form;
+public:
+    UicGeneratorFactory() = default;
+
+    FileType sourceType() const final { return FileType::Form; }
+
+    QString sourceTag() const final { return QLatin1String("ui"); }
+
+    ExtraCompiler *create(const Project *project,
+                          const FilePath &source,
+                          const FilePaths &targets) final
+    {
+        return new UicGenerator(project, source, targets, this);
+    }
+};
+
+void setupUicGenerator()
+{
+    static UicGeneratorFactory theUicGeneratorFactory;
 }
 
-QString UicGeneratorFactory::sourceTag() const
-{
-    return QLatin1String("ui");
-}
-
-ExtraCompiler *UicGeneratorFactory::create(const Project *project,
-                                           const FilePath &source,
-                                           const FilePaths &targets)
-{
-    return new UicGenerator(project, source, targets, this);
-}
-
-} // QtSupport
+} // QtSupport::Internal
diff --git a/src/plugins/qtsupport/uicgenerator.h b/src/plugins/qtsupport/uicgenerator.h
index b3b1de17e4a..f8fdeb5ca05 100644
--- a/src/plugins/qtsupport/uicgenerator.h
+++ b/src/plugins/qtsupport/uicgenerator.h
@@ -3,23 +3,8 @@
 
 #pragma once
 
-#include <projectexplorer/extracompiler.h>
-#include <utils/filepath.h>
+namespace QtSupport::Internal {
 
-namespace QtSupport {
+void setupUicGenerator();
 
-class UicGeneratorFactory : public ProjectExplorer::ExtraCompilerFactory
-{
-public:
-    UicGeneratorFactory() = default;
-
-    ProjectExplorer::FileType sourceType() const override;
-
-    QString sourceTag() const override;
-
-    ProjectExplorer::ExtraCompiler *create(const ProjectExplorer::Project *project,
-                                           const Utils::FilePath &source,
-                                           const Utils::FilePaths &targets) override;
-};
-
-} // QtSupport
+} // QtSupport::Internal