diff --git a/pkgs/desktops/mate/pluma/default.nix b/pkgs/desktops/mate/pluma/default.nix
index 337096fb279a..0bb30250b8ff 100644
--- a/pkgs/desktops/mate/pluma/default.nix
+++ b/pkgs/desktops/mate/pluma/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   postFixup = ''
-    buildPythonPath "$pythonPath"
+    buildPythonPath "''${pythonPath[*]}"
     patchPythonScript $out/lib/pluma/plugins/snippets/Snippet.py
   '';