2 files changed, 6 insertions, 3 deletions
diff --git a/src/libs/installer/extractarchiveoperation.cpp b/src/libs/installer/extractarchiveoperation.cpp
index c41f029e3..128327855 100644
--- a/src/libs/installer/extractarchiveoperation.cpp
+++ b/src/libs/installer/extractarchiveoperation.cpp
@@ -67,6 +67,8 @@ bool ExtractArchiveOperation::performOperation()
     connect(runnable, &Runnable::finished, &receiver, &Receiver::runnableFinished,
         Qt::QueuedConnection);
 
+    m_files.clear();
+
     QEventLoop loop;
     connect(&receiver, &Receiver::finished, &loop, &QEventLoop::quit);
     if (QThreadPool::globalInstance()->tryStart(runnable)) {
@@ -77,6 +79,8 @@ bool ExtractArchiveOperation::performOperation()
         receiver.runnableFinished(true, QString());
     }
 
+    setValue(QLatin1String("files"), m_files);
+
     // TODO: Use backups for rollback, too? Doesn't work for uninstallation though.
 
     // delete all backups we can delete right now, remember the rest
@@ -121,9 +125,7 @@ bool ExtractArchiveOperation::testOperation()
 */
 void ExtractArchiveOperation::fileFinished(const QString &filename)
 {
-    QStringList files = value(QLatin1String("files")).toStringList();
-    files.prepend(filename);
-    setValue(QLatin1String("files"), files);
+    m_files.prepend(filename);
     emit outputTextChanged(QDir::toNativeSeparators(filename));
 }
 
diff --git a/src/libs/installer/extractarchiveoperation.h b/src/libs/installer/extractarchiveoperation.h
index 45c67a9cb..3e75a9bb9 100644
--- a/src/libs/installer/extractarchiveoperation.h
+++ b/src/libs/installer/extractarchiveoperation.h
@@ -56,6 +56,7 @@ private Q_SLOTS:
     void fileFinished(const QString &progress);
 
 private:
+    QStringList m_files;
     class Callback;
     class Runnable;
     class Receiver;