diff --git a/lib/install-panel.js b/lib/install-panel.js
index aee566a7..88a9e3b3 100644
--- a/lib/install-panel.js
+++ b/lib/install-panel.js
@@ -250,6 +250,9 @@ export default class InstallPanel {
   }
 
   addPackageViews (container, packages) {
+    if (packages == null || typeof packages[Symbol.iterator] !== 'function') {
+      return
+    }
     for (const pack of packages) {
       this.addPackageCardView(container, this.getPackageCardView(pack))
     }