diff --git a/pkgs/development/python-modules/flup/default.nix b/pkgs/development/python-modules/flup/default.nix
index 8b149df6ad7..2c0a84aec1a 100644
--- a/pkgs/development/python-modules/flup/default.nix
+++ b/pkgs/development/python-modules/flup/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, python, setuptools, ... }:
 
-stdenv.mkDerivation rec {
+rec {
   name = "flup-1.0.2";
 
   src = fetchurl {