diff --git a/src/plugins/nim/project/nimproject.cpp b/src/plugins/nim/project/nimproject.cpp
index b0d7191c429..99fd84afa2d 100644
--- a/src/plugins/nim/project/nimproject.cpp
+++ b/src/plugins/nim/project/nimproject.cpp
@@ -129,19 +129,21 @@ void NimProject::updateProject()
     const QStringList oldFiles = m_files;
     m_files.clear();
 
-    QList<FileNode *> fileNodes = Utils::filtered(m_futureWatcher.future().result(),
-                                                  [&](const FileNode *fn) {
+    std::vector<std::unique_ptr<FileNode>> fileNodes
+            = transform<std::vector>(m_futureWatcher.future().result(),
+                                     [](FileNode *fn) { return std::unique_ptr<FileNode>(fn); });
+    std::remove_if(std::begin(fileNodes), std::end(fileNodes),
+                   [this](const std::unique_ptr<FileNode> &fn) {
         const FileName path = fn->filePath();
         const QString fileName = path.fileName();
-        const bool keep = !m_excludedFiles.contains(path.toString())
-                && !fileName.endsWith(".nimproject", HostOsInfo::fileNameCaseSensitivity())
-                && !fileName.contains(".nimproject.user", HostOsInfo::fileNameCaseSensitivity());
-        if (!keep)
-            delete fn;
-        return keep;
+        return m_excludedFiles.contains(path.toString())
+                || fileName.endsWith(".nimproject", HostOsInfo::fileNameCaseSensitivity())
+                || fileName.contains(".nimproject.user", HostOsInfo::fileNameCaseSensitivity());
     });
 
-    m_files = Utils::transform(fileNodes, [](const FileNode *fn) { return fn->filePath().toString(); });
+    m_files = transform<QList>(fileNodes, [](const std::unique_ptr<FileNode> &fn) {
+        return fn->filePath().toString();
+    });
     Utils::sort(m_files, [](const QString &a, const QString &b) { return a < b; });
 
     if (oldFiles == m_files)
@@ -149,7 +151,7 @@ void NimProject::updateProject()
 
     auto newRoot = std::make_unique<NimProjectNode>(*this, projectDirectory());
     newRoot->setDisplayName(displayName());
-    newRoot->addNestedNodes(fileNodes);
+    newRoot->addNestedNodes(std::move(fileNodes));
     setRootProjectNode(std::move(newRoot));
     emitParsingFinished(true);
 }