From f3108c5bd2d2a3059d5c5deb6eb0d8dfeb5b96fa Mon Sep 17 00:00:00 2001
From: Luis Pedro Coelho <luis@luispedro.org>
Date: Fri, 16 Dec 2016 11:22:06 +0100
Subject: [PATCH] pythonPackages.natbib: fix for Python 3.5 (#21114)

pathlib is part of the standard library starting in version 3.5.
---
 pkgs/top-level/python-packages.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 6401f931fd73..a00259366478 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8254,8 +8254,9 @@ in {
         pytestflakes
         pytestpep8
         mock
-        pathlib
-      ];
+      ]
+      # pathlib was made part of standard library in 3.5:
+      ++ (optionals (pythonOlder "3.4") [ pathlib ]);
 
     meta = {
       description = "Natural sorting for python";