From 207cf47243c5138b5e006884053e11506834b68d Mon Sep 17 00:00:00 2001
From: Henrik Levkowetz <henrik@levkowetz.com>
Date: Tue, 27 Mar 2018 06:14:56 +0000
Subject: [PATCH] There seems to be issues with pip 9.0.2 and 9.0.3; they seem
 to leave dross when down- and upgrading packages.  - Legacy-Id: 14949

---
 requirements.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/requirements.txt b/requirements.txt
index 2571ba2ea..af3df3b06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,6 +35,7 @@ patch>=1.16,<2.0
 pathlib>=1.0
 pathlib2>=2.3.0
 Pillow>=3.0
+pip>=9.0.1,!=9.0.2,!=9.0.3	# Earlier pip has issues, 9.0.2 and 9.0.3 leaves dross when down- and up-grading packages
 pyang>=1.7.2,<2.0
 pyflakes>=0.9.2
 pyopenssl>=17.5.0		# Used by urllib3.contrib, which is used by PyQuery but not marked as a dependency