python3Packages.numexpr: add packaging

pkgs/development/python-modules/numexpr/default.nix

@@ -1,32 +1,38 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, python
 , numpy
+, packaging
+, python
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "numexpr";
   version = "2.8.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "cd779aa44dd986c4ef10163519239602b027be06a527946656207acf1f58113b";
+    hash = "sha256-zXeapE3ZhsTvEBY1GSOWArAnvgalJ5RmViB6zx9YETs=";
   };
 
-  # Remove existing site.cfg, use the one we built for numpy.
-  preBuild = ''
-    ln -s ${numpy.cfg} site.cfg
-  '';
-
   nativeBuildInputs = [
     numpy
   ];
 
   propagatedBuildInputs = [
     numpy
+    packaging
   ];
 
+  preBuild = ''
+    # Remove existing site.cfg, use the one we built for numpy
+    ln -s ${numpy.cfg} site.cfg
+  '';
+
   checkPhase = ''
     runtest="$(pwd)/numexpr/tests/test_numexpr.py"
     pushd "$out"
@@ -34,9 +40,14 @@ buildPythonPackage rec {
     popd
   '';
 
-  meta = {
+  pythonImportsCheck = [
+    "numexpr"
+  ];
+
+  meta = with lib; {
     description = "Fast numerical array expression evaluator for NumPy";
     homepage = "https://github.com/pydata/numexpr";
-    license = lib.licenses.mit;
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
   };
 }