python.pkgs.django-haystack: move expression

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

@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchPypi
+, django, dateutil, whoosh, pysolr, elasticsearch
+, coverage, mock, nose, geopy }:
+
+buildPythonPackage rec {
+  pname = "django-haystack";
+  version = "2.4.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "04cva8qg79xig4zqhb4dwkpm7734dvhzqclzvrdz70fh59ki5b4f";
+  };
+
+  doCheck = false;  # no tests in source
+
+  checkInputs = [ elasticsearch pysolr whoosh dateutil geopy coverage nose mock coverage ];
+  propagatedBuildInputs = [ django ];
+
+  patchPhase = ''
+    sed -i 's/geopy==/geopy>=/' setup.py
+    sed -i 's/whoosh==/Whoosh>=/' setup.py
+  '';
+
+  meta = with lib; {
+    description = "Modular search for Django";
+    homepage = "http://haystacksearch.org/";
+    license = licenses.bsd3;
+  };
+}