From 263ddd73cd48820feba9a097311cbbf7424644ae Mon Sep 17 00:00:00 2001
From: Sebastian Jordan <sebastian.jordan.mail@googlemail.com>
Date: Sun, 22 Nov 2020 21:23:22 +0100
Subject: [PATCH] pythonPackages.class-registry: Add typing
 propagatedBuildInput when using python2

---
 pkgs/development/python-modules/class-registry/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/class-registry/default.nix b/pkgs/development/python-modules/class-registry/default.nix
index 9a3650bceb8..93c41cadea6 100644
--- a/pkgs/development/python-modules/class-registry/default.nix
+++ b/pkgs/development/python-modules/class-registry/default.nix
@@ -4,6 +4,8 @@
   lib,
   nose,
   six,
+  typing,
+  isPy27,
 }:
 
 buildPythonPackage rec {
@@ -15,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "0zjf9nczl1ifzj07bgs6mwxsfd5xck9l0lchv2j0fv2n481xp2v7";
   };
 
-  propagatedBuildInputs = [ six ];
+  propagatedBuildInputs = [ six ] ++ lib.optional isPy27 typing;
   checkInputs = [ nose ];
 
   # Tests currently failing.