From 13702bd49198f274d727bc3b643824074bc1799a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Maret?= <sebastien.maret@icloud.com>
Date: Mon, 24 Jun 2019 16:13:43 +0200
Subject: [PATCH] pythonPackages.black: fix tests in sandbox mode on Darwin

Fixes #63722
---
 pkgs/development/python-modules/black/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/python-modules/black/default.nix b/pkgs/development/python-modules/black/default.nix
index fc729dd399d2..f17f94387f3e 100644
--- a/pkgs/development/python-modules/black/default.nix
+++ b/pkgs/development/python-modules/black/default.nix
@@ -15,6 +15,10 @@ buildPythonPackage rec {
 
   checkInputs =  [ pytest glibcLocales ];
 
+  # Necessary for the tests to pass on Darwin with sandbox enabled.
+  # Black starts a local server and needs to bind a local address.
+  __darwinAllowLocalNetworking = true;
+
   # Don't know why these tests fails
   checkPhase = ''
     LC_ALL="en_US.UTF-8" pytest \