python3Packages.django-formtools: fix build

pkgs/development/python-modules/django-formtools/default.nix

@@ -1,19 +1,40 @@
-{ lib, buildPythonPackage, fetchPypi, django, python }:
+{ lib
+, buildPythonPackage
+, django
+, fetchPypi
+, python
+, pythonOlder
+, setuptools-scm
+}:
 
 buildPythonPackage rec {
   pname = "django-formtools";
   version = "2.3";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "9663b6eca64777b68d6d4142efad8597fe9a685924673b25aa8a1dcff4db00c3";
   };
 
-  propagatedBuildInputs = [ django ];
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    django
+  ];
+
   checkPhase = ''
     ${python.interpreter} -m django test --settings=tests.settings
   '';
 
+  pythonImportsCheck = [
+    "formtools"
+  ];
+
   meta = with lib; {
     description = "A set of high-level abstractions for Django forms";
     homepage = "https://github.com/jazzband/django-formtools";