diff --git a/src/plugins/mesonprojectmanager/CMakeLists.txt b/src/plugins/mesonprojectmanager/CMakeLists.txt
index 5920ce7586d..af6b95e460d 100644
--- a/src/plugins/mesonprojectmanager/CMakeLists.txt
+++ b/src/plugins/mesonprojectmanager/CMakeLists.txt
@@ -35,8 +35,6 @@ add_qtc_plugin(MesonProjectManager
   mesonprojectplugin.cpp
   mesonrunconfiguration.cpp
   mesonrunconfiguration.h
-  mesontoolkitaspect.cpp
-  mesontoolkitaspect.h
   mesontools.cpp
   mesontools.h
   mesonwrapper.cpp
@@ -45,8 +43,6 @@ add_qtc_plugin(MesonProjectManager
   ninjabuildstep.h
   ninjaparser.cpp
   ninjaparser.h
-  ninjatoolkitaspect.cpp
-  ninjatoolkitaspect.h
   ninjawrapper.h
   projecttree.cpp
   projecttree.h
diff --git a/src/plugins/mesonprojectmanager/mesonbuildsystem.cpp b/src/plugins/mesonprojectmanager/mesonbuildsystem.cpp
index 8e7864bcbee..5606415cde7 100644
--- a/src/plugins/mesonprojectmanager/mesonbuildsystem.cpp
+++ b/src/plugins/mesonprojectmanager/mesonbuildsystem.cpp
@@ -6,8 +6,8 @@
 #include "kitdata.h"
 #include "mesonbuildconfiguration.h"
 #include "mesonprojectmanagertr.h"
-#include "mesontoolkitaspect.h"
 #include "settings.h"
+#include "toolkitaspectwidget.h"
 
 #include <coreplugin/icore.h>
 
@@ -24,8 +24,6 @@
 #include <utils/macroexpander.h>
 #include <utils/qtcassert.h>
 
-#include <optional>
-
 #include <QLoggingCategory>
 
 #define LEAVE_IF_BUSY() \
diff --git a/src/plugins/mesonprojectmanager/mesonproject.cpp b/src/plugins/mesonprojectmanager/mesonproject.cpp
index 5c3b77e54d5..6baeb03957b 100644
--- a/src/plugins/mesonprojectmanager/mesonproject.cpp
+++ b/src/plugins/mesonprojectmanager/mesonproject.cpp
@@ -5,8 +5,7 @@
 
 #include "mesonpluginconstants.h"
 #include "mesonprojectmanagertr.h"
-#include "mesontoolkitaspect.h"
-#include "ninjatoolkitaspect.h"
+#include "toolkitaspectwidget.h"
 
 #include <coreplugin/icontext.h>
 
diff --git a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
index 7608bd77920..a978bd2123a 100644
--- a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
+++ b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
@@ -68,10 +68,6 @@ Project {
             "resources_meson.qrc",
             "settings.cpp",
             "settings.h",
-            "mesontoolkitaspect.cpp",
-            "mesontoolkitaspect.h",
-            "ninjatoolkitaspect.cpp",
-            "ninjatoolkitaspect.h",
             "toolkitaspectwidget.cpp",
             "toolkitaspectwidget.h",
             "toolitemsettings.cpp",
diff --git a/src/plugins/mesonprojectmanager/mesontoolkitaspect.cpp b/src/plugins/mesonprojectmanager/mesontoolkitaspect.cpp
deleted file mode 100644
index 9cf7541c3a0..00000000000
--- a/src/plugins/mesonprojectmanager/mesontoolkitaspect.cpp
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "mesontoolkitaspect.h"
-
-#include "mesonprojectmanagertr.h"
-#include "toolkitaspectwidget.h"
-
-#include <utils/qtcassert.h>
-
-using namespace ProjectExplorer;
-
-namespace MesonProjectManager::Internal {
-
-const char TOOL_ID[] = "MesonProjectManager.MesonKitInformation.Meson";
-
-void MesonToolKitAspect::setMesonTool(Kit *kit, Utils::Id id)
-{
-    QTC_ASSERT(kit && id.isValid(), return );
-    kit->setValue(TOOL_ID, id.toSetting());
-}
-
-Utils::Id MesonToolKitAspect::mesonToolId(const Kit *kit)
-{
-    QTC_ASSERT(kit, return {});
-    return Utils::Id::fromSetting(kit->value(TOOL_ID));
-}
-
-// MesonToolKitAspectFactory
-
-class MesonToolKitAspectFactory final : public KitAspectFactory
-{
-public:
-    MesonToolKitAspectFactory()
-    {
-        setId(TOOL_ID);
-        setDisplayName(Tr::tr("Meson Tool"));
-        setDescription(Tr::tr("The Meson tool to use when building a project with Meson.<br>"
-                              "This setting is ignored when using other build systems."));
-        setPriority(9000);
-    }
-
-    Tasks validate(const Kit *k) const final
-    {
-        Tasks tasks;
-        const auto tool = MesonToolKitAspect::mesonTool(k);
-        if (tool && !tool->isValid())
-            tasks << BuildSystemTask{Task::Warning, Tr::tr("Cannot validate this meson executable.")};
-        return tasks;
-    }
-
-    void setup(Kit *k) final
-    {
-        const auto tool = MesonToolKitAspect::mesonTool(k);
-        if (!tool) {
-            const auto autoDetected = MesonTools::mesonWrapper();
-            if (autoDetected)
-                MesonToolKitAspect::setMesonTool(k, autoDetected->id());
-        }
-    }
-    void fix(Kit *k) final
-    {
-        setup(k);
-    }
-
-    KitAspect *createKitAspect(Kit *k) const override
-    {
-        return new MesonToolKitAspectImpl{k, this, MesonToolKitAspectImpl::ToolType::Meson};
-    }
-
-    ItemList toUserOutput(const Kit *k) const override
-    {
-        const auto tool = MesonToolKitAspect::mesonTool(k);
-        if (tool)
-            return {{Tr::tr("Meson"), tool->name()}};
-        return {{Tr::tr("Meson"), Tr::tr("Unconfigured")}};
-    }
-};
-
-const MesonToolKitAspectFactory theMesonKitAspectFactory;
-
-} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/mesontoolkitaspect.h b/src/plugins/mesonprojectmanager/mesontoolkitaspect.h
deleted file mode 100644
index 3924d455f47..00000000000
--- a/src/plugins/mesonprojectmanager/mesontoolkitaspect.h
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include "mesontools.h"
-
-#include <projectexplorer/kit.h>
-#include <projectexplorer/kitmanager.h>
-
-namespace MesonProjectManager::Internal {
-
-class MesonToolKitAspect final
-{
-public:
-    static void setMesonTool(ProjectExplorer::Kit *kit, Utils::Id id);
-    static Utils::Id mesonToolId(const ProjectExplorer::Kit *kit);
-
-    static inline decltype(auto) mesonTool(const ProjectExplorer::Kit *kit)
-    {
-        return MesonTools::mesonWrapper(MesonToolKitAspect::mesonToolId(kit));
-    }
-
-    static inline bool isValid(const ProjectExplorer::Kit *kit)
-    {
-        auto tool = mesonTool(kit);
-        return (tool && tool->isValid());
-    }
-};
-
-} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/mesontools.h b/src/plugins/mesonprojectmanager/mesontools.h
index b52b34fbd1b..23ff67b4b6b 100644
--- a/src/plugins/mesonprojectmanager/mesontools.h
+++ b/src/plugins/mesonprojectmanager/mesontools.h
@@ -3,7 +3,6 @@
 
 #pragma once
 
-#include "mesonpluginconstants.h"
 #include "mesonwrapper.h"
 #include "ninjawrapper.h"
 #include "toolwrapper.h"
diff --git a/src/plugins/mesonprojectmanager/ninjabuildstep.cpp b/src/plugins/mesonprojectmanager/ninjabuildstep.cpp
index ab8b2d396e6..c73afa10ac9 100644
--- a/src/plugins/mesonprojectmanager/ninjabuildstep.cpp
+++ b/src/plugins/mesonprojectmanager/ninjabuildstep.cpp
@@ -7,8 +7,8 @@
 #include "mesonpluginconstants.h"
 #include "mesonprojectmanagertr.h"
 #include "mesonoutputparser.h"
-#include "ninjatoolkitaspect.h"
 #include "settings.h"
+#include "toolkitaspectwidget.h"
 
 #include <coreplugin/find/itemviewfind.h>
 
diff --git a/src/plugins/mesonprojectmanager/ninjatoolkitaspect.cpp b/src/plugins/mesonprojectmanager/ninjatoolkitaspect.cpp
deleted file mode 100644
index 629fd1b4839..00000000000
--- a/src/plugins/mesonprojectmanager/ninjatoolkitaspect.cpp
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "ninjatoolkitaspect.h"
-
-#include "mesonprojectmanagertr.h"
-#include "toolkitaspectwidget.h"
-
-#include <utils/qtcassert.h>
-
-using namespace ProjectExplorer;
-
-namespace MesonProjectManager::Internal {
-
-const char TOOL_ID[] = "MesonProjectManager.MesonKitInformation.Ninja";
-
-void NinjaToolKitAspect::setNinjaTool(ProjectExplorer::Kit *kit, Utils::Id id)
-{
-    QTC_ASSERT(kit && id.isValid(), return );
-    kit->setValue(TOOL_ID, id.toSetting());
-}
-
-Utils::Id NinjaToolKitAspect::ninjaToolId(const ProjectExplorer::Kit *kit)
-{
-    QTC_ASSERT(kit, return {});
-    return Utils::Id::fromSetting(kit->value(TOOL_ID));
-}
-
-// NinjaToolKitAspectFactory
-
-class NinjaToolKitAspectFactory final : public ProjectExplorer::KitAspectFactory
-{
-public:
-    NinjaToolKitAspectFactory()
-    {
-        setId(TOOL_ID);
-        setDisplayName(Tr::tr("Ninja Tool"));
-        setDescription(Tr::tr("The Ninja tool to use when building a project with Meson.<br>"
-                              "This setting is ignored when using other build systems."));
-        setPriority(9000);
-    }
-
-    Tasks validate(const Kit *k) const final
-    {
-        Tasks tasks;
-        const auto tool = NinjaToolKitAspect::ninjaTool(k);
-        if (tool && !tool->isValid())
-            tasks << BuildSystemTask{Task::Warning,
-                                                      Tr::tr("Cannot validate this Ninja executable.")};
-        return tasks;
-    }
-
-    void setup(Kit *k) final
-    {
-        const auto tool = NinjaToolKitAspect::ninjaTool(k);
-        if (!tool) {
-            const auto autoDetected = MesonTools::ninjaWrapper();
-            if (autoDetected)
-                NinjaToolKitAspect::setNinjaTool(k, autoDetected->id());
-        }
-    }
-    void fix(Kit *k) final
-    {
-        setup(k);
-    }
-
-    ItemList toUserOutput(const Kit *k) const override
-    {
-        const auto tool = NinjaToolKitAspect::ninjaTool(k);
-        if (tool)
-            return {{Tr::tr("Ninja"), tool->name()}};
-        return {{Tr::tr("Ninja"), Tr::tr("Unconfigured")}};
-    }
-
-    KitAspect *createKitAspect(Kit *k) const final
-    {
-        return new MesonToolKitAspectImpl(k, this, MesonToolKitAspectImpl::ToolType::Ninja);
-    }
-};
-
-const NinjaToolKitAspectFactory theNinjaToolKitAspectFactory;
-
-} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/ninjatoolkitaspect.h b/src/plugins/mesonprojectmanager/ninjatoolkitaspect.h
deleted file mode 100644
index d1ee50c7a38..00000000000
--- a/src/plugins/mesonprojectmanager/ninjatoolkitaspect.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include "mesontools.h"
-
-#include <projectexplorer/kit.h>
-#include <projectexplorer/kitmanager.h>
-
-namespace MesonProjectManager::Internal {
-
-class NinjaToolKitAspect final
-{
-public:
-    static void setNinjaTool(ProjectExplorer::Kit *kit, Utils::Id id);
-    static Utils::Id ninjaToolId(const ProjectExplorer::Kit *kit);
-
-    static inline decltype(auto) ninjaTool(const ProjectExplorer::Kit *kit)
-    {
-        return MesonTools::ninjaWrapper(NinjaToolKitAspect::ninjaToolId(kit));
-    }
-    static inline bool isValid(const ProjectExplorer::Kit *kit)
-    {
-        auto tool = ninjaTool(kit);
-        return (tool && tool->isValid());
-    }
-};
-
-} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/toolkitaspectwidget.cpp b/src/plugins/mesonprojectmanager/toolkitaspectwidget.cpp
index 10629b0798b..f4adda06870 100644
--- a/src/plugins/mesonprojectmanager/toolkitaspectwidget.cpp
+++ b/src/plugins/mesonprojectmanager/toolkitaspectwidget.cpp
@@ -4,15 +4,63 @@
 #include "toolkitaspectwidget.h"
 
 #include "mesonpluginconstants.h"
-#include "mesontoolkitaspect.h"
-#include "ninjatoolkitaspect.h"
+#include "mesonprojectmanagertr.h"
+#include "mesontools.h"
 
+#include <utils/layoutbuilder.h>
 #include <utils/qtcassert.h>
 
+#include <QComboBox>
+#include <QCoreApplication>
+
 using namespace ProjectExplorer;
+using namespace Utils;
 
 namespace MesonProjectManager::Internal {
 
+enum class ToolType { Meson, Ninja };
+
+// Meson/Ninja KitAspect base
+
+class MesonToolKitAspectImpl final : public KitAspect
+{
+public:
+    MesonToolKitAspectImpl(Kit *kit,
+                           const KitAspectFactory *factory,
+                           ToolType type);
+    ~MesonToolKitAspectImpl() { delete m_toolsComboBox; }
+
+private:
+    void addTool(const MesonTools::Tool_t &tool);
+    void removeTool(const MesonTools::Tool_t &tool);
+    void setCurrentToolIndex(int index);
+    int indexOf(const Id &id);
+    bool isCompatible(const MesonTools::Tool_t &tool);
+    void loadTools();
+    void setToDefault();
+
+    void makeReadOnly() final { m_toolsComboBox->setEnabled(false); }
+
+    void addToInnerLayout(Layouting::Layout &parent) final
+    {
+        addMutableAction(m_toolsComboBox);
+        parent.addItem(m_toolsComboBox);
+    }
+
+    void refresh() final
+    {
+        const auto id = [this] {
+            if (m_type == ToolType::Meson)
+                return MesonToolKitAspect::mesonToolId(m_kit);
+            return NinjaToolKitAspect::ninjaToolId(m_kit);
+        }();
+        m_toolsComboBox->setCurrentIndex(indexOf(id));
+    }
+
+    QComboBox *m_toolsComboBox;
+    ToolType m_type;
+};
+
 MesonToolKitAspectImpl::MesonToolKitAspectImpl(Kit *kit,
                                                const KitAspectFactory *factory,
                                                ToolType type)
@@ -36,10 +84,7 @@ MesonToolKitAspectImpl::MesonToolKitAspectImpl(Kit *kit,
             this, &MesonToolKitAspectImpl::setCurrentToolIndex);
 }
 
-MesonToolKitAspectImpl::~MesonToolKitAspectImpl()
-{
-    delete m_toolsComboBox;
-}
+
 
 void MesonToolKitAspectImpl::addTool(const MesonTools::Tool_t &tool)
 {
@@ -64,17 +109,17 @@ void MesonToolKitAspectImpl::setCurrentToolIndex(int index)
 {
     if (m_toolsComboBox->count() == 0)
         return;
-    const Utils::Id id = Utils::Id::fromSetting(m_toolsComboBox->itemData(index));
+    const Id id = Id::fromSetting(m_toolsComboBox->itemData(index));
     if (m_type == ToolType::Meson)
         MesonToolKitAspect::setMesonTool(m_kit, id);
     else
         NinjaToolKitAspect::setNinjaTool(m_kit, id);
 }
 
-int MesonToolKitAspectImpl::indexOf(const Utils::Id &id)
+int MesonToolKitAspectImpl::indexOf(const Id &id)
 {
     for (int i = 0; i < m_toolsComboBox->count(); ++i) {
-        if (id == Utils::Id::fromSetting(m_toolsComboBox->itemData(i)))
+        if (id == Id::fromSetting(m_toolsComboBox->itemData(i)))
             return i;
     }
     return -1;
@@ -113,4 +158,165 @@ void MesonToolKitAspectImpl::setToDefault()
     }
 }
 
+// MesonToolKitAspect
+
+const char MESON_TOOL_ID[] = "MesonProjectManager.MesonKitInformation.Meson";
+
+void MesonToolKitAspect::setMesonTool(Kit *kit, Id id)
+{
+    QTC_ASSERT(kit && id.isValid(), return );
+    kit->setValue(MESON_TOOL_ID, id.toSetting());
+}
+
+Id MesonToolKitAspect::mesonToolId(const Kit *kit)
+{
+    QTC_ASSERT(kit, return {});
+    return Id::fromSetting(kit->value(MESON_TOOL_ID));
+}
+
+std::shared_ptr<MesonWrapper> MesonToolKitAspect::mesonTool(const Kit *kit)
+{
+    return MesonTools::mesonWrapper(MesonToolKitAspect::mesonToolId(kit));
+}
+
+bool MesonToolKitAspect::isValid(const Kit *kit)
+{
+    auto tool = mesonTool(kit);
+    return tool && tool->isValid();
+}
+
+// MesonToolKitAspectFactory
+
+class MesonToolKitAspectFactory final : public KitAspectFactory
+{
+public:
+    MesonToolKitAspectFactory()
+    {
+        setId(MESON_TOOL_ID);
+        setDisplayName(Tr::tr("Meson Tool"));
+        setDescription(Tr::tr("The Meson tool to use when building a project with Meson.<br>"
+                              "This setting is ignored when using other build systems."));
+        setPriority(9000);
+    }
+
+    Tasks validate(const Kit *k) const final
+    {
+        Tasks tasks;
+        const auto tool = MesonToolKitAspect::mesonTool(k);
+        if (tool && !tool->isValid())
+            tasks << BuildSystemTask{Task::Warning, Tr::tr("Cannot validate this meson executable.")};
+        return tasks;
+    }
+
+    void setup(Kit *k) final
+    {
+        const auto tool = MesonToolKitAspect::mesonTool(k);
+        if (!tool) {
+            const auto autoDetected = MesonTools::mesonWrapper();
+            if (autoDetected)
+                MesonToolKitAspect::setMesonTool(k, autoDetected->id());
+        }
+    }
+    void fix(Kit *k) final
+    {
+        setup(k);
+    }
+
+    KitAspect *createKitAspect(Kit *k) const final
+    {
+        return new MesonToolKitAspectImpl(k, this, ToolType::Meson);
+    }
+
+    ItemList toUserOutput(const Kit *k) const final
+    {
+        const auto tool = MesonToolKitAspect::mesonTool(k);
+        if (tool)
+            return {{Tr::tr("Meson"), tool->name()}};
+        return {{Tr::tr("Meson"), Tr::tr("Unconfigured")}};
+    }
+};
+
+const MesonToolKitAspectFactory theMesonKitAspectFactory;
+
+
+// NinjaToolKitAspect
+
+const char NINJA_TOOL_ID[] = "MesonProjectManager.MesonKitInformation.Ninja";
+
+void NinjaToolKitAspect::setNinjaTool(Kit *kit, Id id)
+{
+    QTC_ASSERT(kit && id.isValid(), return );
+    kit->setValue(NINJA_TOOL_ID, id.toSetting());
+}
+
+Id NinjaToolKitAspect::ninjaToolId(const Kit *kit)
+{
+    QTC_ASSERT(kit, return {});
+    return Id::fromSetting(kit->value(NINJA_TOOL_ID));
+}
+
+std::shared_ptr<NinjaWrapper> NinjaToolKitAspect::ninjaTool(const Kit *kit)
+{
+    return MesonTools::ninjaWrapper(NinjaToolKitAspect::ninjaToolId(kit));
+}
+
+bool NinjaToolKitAspect::isValid(const Kit *kit)
+{
+    auto tool = ninjaTool(kit);
+    return tool && tool->isValid();
+}
+
+// NinjaToolKitAspectFactory
+
+class NinjaToolKitAspectFactory final : public KitAspectFactory
+{
+public:
+    NinjaToolKitAspectFactory()
+    {
+        setId(NINJA_TOOL_ID);
+        setDisplayName(Tr::tr("Ninja Tool"));
+        setDescription(Tr::tr("The Ninja tool to use when building a project with Meson.<br>"
+                              "This setting is ignored when using other build systems."));
+        setPriority(9000);
+    }
+
+    Tasks validate(const Kit *k) const final
+    {
+        Tasks tasks;
+        const auto tool = NinjaToolKitAspect::ninjaTool(k);
+        if (tool && !tool->isValid())
+            tasks << BuildSystemTask{Task::Warning, Tr::tr("Cannot validate this Ninja executable.")};
+        return tasks;
+    }
+
+    void setup(Kit *k) final
+    {
+        const auto tool = NinjaToolKitAspect::ninjaTool(k);
+        if (!tool) {
+            const auto autoDetected = MesonTools::ninjaWrapper();
+            if (autoDetected)
+                NinjaToolKitAspect::setNinjaTool(k, autoDetected->id());
+        }
+    }
+    void fix(Kit *k) final
+    {
+        setup(k);
+    }
+
+    ItemList toUserOutput(const Kit *k) const final
+    {
+        const auto tool = NinjaToolKitAspect::ninjaTool(k);
+        if (tool)
+            return {{Tr::tr("Ninja"), tool->name()}};
+        return {{Tr::tr("Ninja"), Tr::tr("Unconfigured")}};
+    }
+
+    KitAspect *createKitAspect(Kit *k) const final
+    {
+        return new MesonToolKitAspectImpl(k, this, ToolType::Ninja);
+    }
+};
+
+const NinjaToolKitAspectFactory theNinjaToolKitAspectFactory;
+
 } // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/toolkitaspectwidget.h b/src/plugins/mesonprojectmanager/toolkitaspectwidget.h
index dff96aadc99..1ff312d99f2 100644
--- a/src/plugins/mesonprojectmanager/toolkitaspectwidget.h
+++ b/src/plugins/mesonprojectmanager/toolkitaspectwidget.h
@@ -1,58 +1,34 @@
 // Copyright (C) 2020 Alexis Jeandet.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
 #pragma once
 
-#include "mesontoolkitaspect.h"
-#include "ninjatoolkitaspect.h"
+#include "mesonwrapper.h"
+#include "ninjawrapper.h"
 
+#include <projectexplorer/kit.h>
 #include <projectexplorer/kitmanager.h>
 
-#include <utils/layoutbuilder.h>
-
-#include <QComboBox>
-#include <QCoreApplication>
-
 namespace MesonProjectManager::Internal {
 
-class MesonToolKitAspectImpl final : public ProjectExplorer::KitAspect
+class MesonToolKitAspect final
 {
 public:
-    enum class ToolType { Meson, Ninja };
+    static void setMesonTool(ProjectExplorer::Kit *kit, Utils::Id id);
+    static Utils::Id mesonToolId(const ProjectExplorer::Kit *kit);
 
-    MesonToolKitAspectImpl(ProjectExplorer::Kit *kit,
-                        const ProjectExplorer::KitAspectFactory *factory,
-                        ToolType type);
-    ~MesonToolKitAspectImpl();
+    static bool isValid(const ProjectExplorer::Kit *kit);
+    static std::shared_ptr<MesonWrapper> mesonTool(const ProjectExplorer::Kit *kit);
+};
 
-private:
-    void addTool(const MesonTools::Tool_t &tool);
-    void removeTool(const MesonTools::Tool_t &tool);
-    void setCurrentToolIndex(int index);
-    int indexOf(const Utils::Id &id);
-    bool isCompatible(const MesonTools::Tool_t &tool);
-    void loadTools();
-    void setToDefault();
+class NinjaToolKitAspect final
+{
+public:
+    static void setNinjaTool(ProjectExplorer::Kit *kit, Utils::Id id);
+    static Utils::Id ninjaToolId(const ProjectExplorer::Kit *kit);
 
-    void makeReadOnly() override { m_toolsComboBox->setEnabled(false); }
-
-    void addToInnerLayout(Layouting::Layout &parent) override
-    {
-        addMutableAction(m_toolsComboBox);
-        parent.addItem(m_toolsComboBox);
-    }
-
-    void refresh() override
-    {
-        const auto id = [this] {
-            if (m_type == ToolType::Meson)
-                return MesonToolKitAspect::mesonToolId(m_kit);
-            return NinjaToolKitAspect::ninjaToolId(m_kit);
-        }();
-        m_toolsComboBox->setCurrentIndex(indexOf(id));
-    }
-
-    QComboBox *m_toolsComboBox;
-    ToolType m_type;
+    static bool isValid(const ProjectExplorer::Kit *kit);
+    static std::shared_ptr<NinjaWrapper> ninjaTool(const ProjectExplorer::Kit *kit);
 };
 
 } // MesonProjectManager::Internal