diff --git a/src/plugins/qbsprojectmanager/qbsnodes.cpp b/src/plugins/qbsprojectmanager/qbsnodes.cpp
index f244f233138..4046f90cacf 100644
--- a/src/plugins/qbsprojectmanager/qbsnodes.cpp
+++ b/src/plugins/qbsprojectmanager/qbsnodes.cpp
@@ -437,7 +437,7 @@ void QbsGroupNode::updateQbsGroupData(const qbs::GroupData *grp, const QString &
         emitNodeUpdated();
 }
 
-void QbsGroupNode::setupFiles(QbsBaseProjectNode *root, const QStringList &files,
+void QbsGroupNode::setupFiles(ProjectExplorer::FolderNode *root, const QStringList &files,
                               const QString &productPath, bool updateExisting)
 {
     // Build up a tree of nodes:
@@ -797,17 +797,53 @@ QbsProjectNode *QbsProjectNode::findProjectNode(const QString &name)
     return 0;
 }
 
+// --------------------------------------------------------------------
+// QbsRootProjectNode:
+// --------------------------------------------------------------------
 
 QbsRootProjectNode::QbsRootProjectNode(QbsProject *project) :
     QbsProjectNode(project->projectFilePath().toString()),
-    m_project(project)
+    m_project(project),
+    m_buildSystemFiles(new ProjectExplorer::FolderNode(project->projectDirectory().toString()))
 {
+    m_buildSystemFiles->setDisplayName(tr("Qbs files"));
+    addFolderNodes(QList<FolderNode *>() << m_buildSystemFiles);
 }
 
 void QbsRootProjectNode::update()
 {
+    QStringList buildSystemFiles = unreferencedBuildSystemFiles(m_project->qbsProject());
+
+    QStringList projectBuildSystemFiles;
+    Utils::FileName base = m_project->projectDirectory();
+    foreach (const QString &f, buildSystemFiles) {
+        if (Utils::FileName::fromString(f).isChildOf(base))
+                projectBuildSystemFiles.append(f);
+    }
+    QbsGroupNode::setupFiles(m_buildSystemFiles, projectBuildSystemFiles, base.toString(), false);
+
     update(m_project->qbsProjectData());
 }
 
+static QSet<QString> referencedBuildSystemFiles(const qbs::ProjectData &data)
+{
+    QSet<QString> result;
+    result.insert(data.location().fileName());
+    foreach (const qbs::ProjectData &subProject, data.subProjects())
+        result.unite(referencedBuildSystemFiles(subProject));
+    foreach (const qbs::ProductData &product, data.products()) {
+        result.insert(product.location().fileName());
+        foreach (const qbs::GroupData &group, product.groups())
+            result.insert(group.location().fileName());
+    }
+
+    return result;
+}
+
+QStringList QbsRootProjectNode::unreferencedBuildSystemFiles(const qbs::Project &p) const
+{
+    return p.buildSystemFiles().subtract(referencedBuildSystemFiles(p.projectData())).toList();
+}
+
 } // namespace Internal
 } // namespace QbsProjectManager
diff --git a/src/plugins/qbsprojectmanager/qbsnodes.h b/src/plugins/qbsprojectmanager/qbsnodes.h
index bc3bc569625..92dfde80a76 100644
--- a/src/plugins/qbsprojectmanager/qbsnodes.h
+++ b/src/plugins/qbsprojectmanager/qbsnodes.h
@@ -111,7 +111,7 @@ public:
 
     QString productPath() const;
 
-    static void setupFiles(QbsBaseProjectNode *root, const QStringList &files,
+    static void setupFiles(FolderNode *root, const QStringList &files,
                            const QString &productPath, bool updateExisting);
 
 private:
@@ -184,6 +184,10 @@ private:
     static QIcon m_projectIcon;
 };
 
+// --------------------------------------------------------------------
+// QbsRootProjectNode:
+// --------------------------------------------------------------------
+
 class QbsRootProjectNode : public QbsProjectNode
 {
     Q_OBJECT
@@ -197,7 +201,10 @@ public:
     QbsProject *project() const { return m_project; }
 
 private:
+    QStringList unreferencedBuildSystemFiles(const qbs::Project &p) const;
+
     QbsProject * const m_project;
+    ProjectExplorer::FolderNode *m_buildSystemFiles;
 };