diff --git a/src/modules/netinstall/NetInstallPage.cpp b/src/modules/netinstall/NetInstallPage.cpp
index f897c0018..4468e9cc0 100644
--- a/src/modules/netinstall/NetInstallPage.cpp
+++ b/src/modules/netinstall/NetInstallPage.cpp
@@ -78,6 +78,6 @@ NetInstallPage::onActivate()
     {
         const QVariantList groups = gs->value( "NetinstallAdd" ).toList();
 
-        static_cast< PackageModel* >( ui->groupswidget->model() )->appendModelData( groups );
+        static_cast< PackageModel* >( ui->groupswidget->model() )->appendModelData( groups, "packageChooser" );
     }
 }
diff --git a/src/modules/netinstall/PackageModel.cpp b/src/modules/netinstall/PackageModel.cpp
index 9eafd898e..d139a89f6 100644
--- a/src/modules/netinstall/PackageModel.cpp
+++ b/src/modules/netinstall/PackageModel.cpp
@@ -342,20 +342,26 @@ PackageModel::setupModelData( const QVariantList& l )
     emit endResetModel();
 }
 
-/** @brief Appends groups to the tree
- *
- * Uses the data from @p groupList to add elements to the
- * existing tree that m_rootItem points to.  If m_rootItem
- * is not valid, it does nothing
- *
- */
 void
-PackageModel::appendModelData( const QVariantList& groupList )
+PackageModel::appendModelData( const QVariantList& groupList, const QString source )
 {
     if ( m_rootItem )
     {
         emit beginResetModel();
+
+        // Prune any existing data from the same source
+        for ( int i = 0; i < m_rootItem->childCount(); i++ )
+        {
+            PackageTreeItem* child = m_rootItem->child( i );
+            if ( child->source() == source )
+            {
+                m_rootItem->removeChild( i );
+            }
+        }
+
+        // Add the new data to the model
         setupModelData( groupList, m_rootItem );
+
         emit endResetModel();
     }
 }
diff --git a/src/modules/netinstall/PackageModel.h b/src/modules/netinstall/PackageModel.h
index fcdfe5daa..49a17f0b6 100644
--- a/src/modules/netinstall/PackageModel.h
+++ b/src/modules/netinstall/PackageModel.h
@@ -55,12 +55,23 @@ public:
     int columnCount( const QModelIndex& parent = QModelIndex() ) const override;
 
     void setSelections( QStringList selectNames );
-    void setSelections(QStringList selectNames, PackageTreeItem *item );
+    void setSelections( QStringList selectNames, PackageTreeItem* item );
 
     PackageTreeItem::List getPackages() const;
     PackageTreeItem::List getItemPackages( PackageTreeItem* item ) const;
 
-    void appendModelData( const QVariantList& groupList );
+    /** @brief Appends groups to the tree
+     *
+     * Uses the data from @p groupList to add elements to the
+     * existing tree that m_rootItem points to.  If m_rootItem
+     * is not valid, it does nothing
+     *
+     * Before adding anything to the model, it ensures that there
+     * is no existing data from the same source.  If there is, that
+     * data is pruned first
+     *
+     */
+    void appendModelData( const QVariantList& groupList, const QString source );
 
 private:
     friend class ItemTests;
diff --git a/src/modules/netinstall/PackageTreeItem.cpp b/src/modules/netinstall/PackageTreeItem.cpp
index b30cdf915..245f1ddc6 100644
--- a/src/modules/netinstall/PackageTreeItem.cpp
+++ b/src/modules/netinstall/PackageTreeItem.cpp
@@ -70,6 +70,7 @@ PackageTreeItem::PackageTreeItem( const QVariantMap& groupData, GroupTag&& paren
     , m_description( CalamaresUtils::getString( groupData, "description" ) )
     , m_preScript( CalamaresUtils::getString( groupData, "pre-install" ) )
     , m_postScript( CalamaresUtils::getString( groupData, "post-install" ) )
+    , m_source( CalamaresUtils::getString( groupData, "source" ) )
     , m_isGroup( true )
     , m_isCritical( parentCriticality( groupData, parent.parent ) )
     , m_isHidden( CalamaresUtils::getBool( groupData, "hidden", false ) )
@@ -248,6 +249,19 @@ PackageTreeItem::setChildrenSelected( Qt::CheckState isSelected )
         }
 }
 
+void
+PackageTreeItem::removeChild( int row )
+{
+    if ( row < m_childItems.count() )
+    {
+        m_childItems.removeAt( row );
+    }
+    else
+    {
+        cWarning() << "Attempt to remove invalid child in removeChild() at row " + QString::number( row );
+    }
+}
+
 int
 PackageTreeItem::type() const
 {
diff --git a/src/modules/netinstall/PackageTreeItem.h b/src/modules/netinstall/PackageTreeItem.h
index c04b9a21d..2a0fca83e 100644
--- a/src/modules/netinstall/PackageTreeItem.h
+++ b/src/modules/netinstall/PackageTreeItem.h
@@ -56,6 +56,7 @@ public:
     QString description() const { return m_description; }
     QString preScript() const { return m_preScript; }
     QString postScript() const { return m_postScript; }
+    QString source() const { return m_source; }
 
     /** @brief Is this item a group-item?
      *
@@ -124,6 +125,8 @@ public:
     void setSelected( Qt::CheckState isSelected );
     void setChildrenSelected( Qt::CheckState isSelected );
 
+    void removeChild( int row );
+
     /** @brief Update selectedness based on the children's states
      *
      * This only makes sense for groups, which might have packages
@@ -157,6 +160,7 @@ private:
     QString m_description;
     QString m_preScript;
     QString m_postScript;
+    QString m_source;
     bool m_isGroup = false;
     bool m_isCritical = false;
     bool m_isHidden = false;
diff --git a/src/modules/packagechooser/Config.cpp b/src/modules/packagechooser/Config.cpp
index 2f54442b7..c573889ab 100644
--- a/src/modules/packagechooser/Config.cpp
+++ b/src/modules/packagechooser/Config.cpp
@@ -140,7 +140,7 @@ Config::updateGlobalStorage( const QStringList& selected ) const
                 auto netinstallAddOrig = gs->value( "NetinstallAdd" );
                 if ( netinstallAddOrig.canConvert( QVariant::List ) )
                 {
-                    netinstallDataList += netinstallAddOrig.toList();
+                    //netinstallDataList += netinstallAddOrig.toList();
                 }
                 else
                 {
diff --git a/src/modules/packagechooser/PackageModel.cpp b/src/modules/packagechooser/PackageModel.cpp
index 7b7cfc08f..3d1c0c044 100644
--- a/src/modules/packagechooser/PackageModel.cpp
+++ b/src/modules/packagechooser/PackageModel.cpp
@@ -140,11 +140,16 @@ QVariantList
 PackageListModel::getNetinstallDataForNames( const QStringList& ids ) const
 {
     QVariantList l;
-    for ( const auto& p : qAsConst( m_packages ) )
+    for ( auto &p : m_packages )
     {
         if ( ids.contains( p.id ) )
         {
-            l.append( p.netinstallData );
+            if ( !p.netinstallData.isEmpty() )
+            {
+                QVariantMap newData = p.netinstallData;
+                newData["source"] = "packageChooser";
+                l.append( newData );
+            }
         }
     }
     return l;