From 5d21fabdee612c1ae0584a965e8106a395b710b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Domen=20Ko=C5=BEar?= <domen@dev.si>
Date: Wed, 28 Oct 2015 21:07:55 +0100
Subject: [PATCH] pythonPackages.vobject: fix transient failure in tests

---
 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 5692bb48f019..8fea68863995 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12733,6 +12733,11 @@ let
 
     propagatedBuildInputs = with self; [ dateutil ];
 
+    patchPhase = ''
+      # fails due to hash randomization
+      sed -i 's/RRULE:FREQ=MONTHLY;BYMONTHDAY=-1,-5/RRULE:FREQ=MONTHLY;BYMONTHDAY=.../' test_vobject.py
+    '';
+
     meta = {
       description = "Module for reading vCard and vCalendar files";
       homepage = http://vobject.skyhouseconsulting.com/;