From 0353121dc533454065bc9c30c757f5d7e669319a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Domen=20Ko=C5=BEar?= <domen@dev.si>
Date: Fri, 23 Oct 2015 19:49:41 +0200
Subject: [PATCH] pythonPackages.unittest2: fix a transient bug

---
 pkgs/top-level/python-packages.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8d727b9c1b6..0a7c5e727c5 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17055,6 +17055,11 @@ let
     # # 1.0.0 and up create a circle dependency with traceback2/pbr
     doCheck = false;
 
+    # fixes a transient error when collecting tests, see https://bugs.launchpad.net/python-neutronclient/+bug/1508547
+    patchPhase = ''
+      sed -i '510i\        return None, False' unittest2/loader.py
+    ''; 
+
     propagatedBuildInputs = with self; [ six argparse traceback2 ];
 
     meta = {