--- a/js/ui/extensionDownloader.js
+++ b/js/ui/extensionDownloader.js
@@ -86,7 +86,7 @@
     stream.output_stream.write_bytes(contents, null);
     stream.close(null);
     let [success, pid] = GLib.spawn_async(null,
-                                          ['unzip', '-uod', dir.get_path(), '--', file.get_path()],
+                                          ['@unzip@/bin/unzip', '-uod', dir.get_path(), '--', file.get_path()],
                                           null,
                                           GLib.SpawnFlags.SEARCH_PATH | GLib.SpawnFlags.DO_NOT_REAP_CHILD,
                                           null);