From a29f812f365aede81a5e8dcdc714abab21637499 Mon Sep 17 00:00:00 2001
From: Niclas Thall <niclas.thall@zenuity.com>
Date: Sun, 27 Sep 2020 11:34:56 +0200
Subject: [PATCH] pythonPackages.pygraphviz: upgrade to Python 3

Python 2 support was dropped on
https://github.com/pygraphviz/pygraphviz/commit/c341911c15b8f88eb3852bf6be213ff5b50f7cb3

ZHF: #97479
https://hydra.nixos.org/build/127631797
---
 pkgs/development/python-modules/pygraphviz/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pygraphviz/default.nix b/pkgs/development/python-modules/pygraphviz/default.nix
index 3a451f4af1e..a8d80f6e617 100644
--- a/pkgs/development/python-modules/pygraphviz/default.nix
+++ b/pkgs/development/python-modules/pygraphviz/default.nix
@@ -1,10 +1,12 @@
-{ stdenv, buildPythonPackage, fetchPypi, substituteAll, graphviz
+{ stdenv, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
 , pkgconfig, doctest-ignore-unicode, mock, nose }:
 
 buildPythonPackage rec {
   pname = "pygraphviz";
   version = "1.6";
 
+  disabled = !isPy3k;
+
   src = fetchPypi {
     inherit pname version;
     sha256 = "411ae84a5bc313e3e1523a1cace59159f512336318a510573b47f824edef8860";