diff --git a/pkgs/development/python-modules/graph-tool/2.x.x.nix b/pkgs/development/python-modules/graph-tool/2.x.x.nix
index b3ed1a8b6ec..0b89303dd5a 100644
--- a/pkgs/development/python-modules/graph-tool/2.x.x.nix
+++ b/pkgs/development/python-modules/graph-tool/2.x.x.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, python, cairomm, sparsehash, pycairo, autoreconfHook,
 pkgconfig, boost, expat, scipy, numpy, cgal, gmp, mpfr, lndir,
-gobjectIntrospection, pygobject3, gtk3, matplotlib, ncurses }:
+gobjectIntrospection, pygobject3, gtk3, matplotlib, ncurses,
+buildPythonPackage }:
 
-stdenv.mkDerivation rec {
+buildPythonPackage rec {
+  format = "other";
   version = "2.26";
   name = "${python.libPrefix}-graph-tool-${version}";
 
-  pythonModule = python;
-
   meta = with stdenv.lib; {
     description = "Python module for manipulation and statistical analysis of graphs";
     homepage    = http://graph-tool.skewed.de/;