diff --git a/pkgs/by-name/xf/xfce4-dockbarx-plugin/package.nix b/pkgs/by-name/xf/xfce4-dockbarx-plugin/package.nix
index a20c8f3a9e60..581f39005fa6 100644
--- a/pkgs/by-name/xf/xfce4-dockbarx-plugin/package.nix
+++ b/pkgs/by-name/xf/xfce4-dockbarx-plugin/package.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
   postFixup = ''
     makeWrapperArgs+=("''${gappsWrapperArgs[@]}")
     chmod +x $out/share/dockbarx/xfce4-panel-plug
-    wrapPythonProgramsIn "$out/share/dockbarx" "$out $pythonPath"
+    wrapPythonProgramsIn "$out/share/dockbarx" "$out ''${pythonPath[*]}"
   '';
 
   meta = {