From a32a76f08273e43462b1161166a0982cb1bb5d34 Mon Sep 17 00:00:00 2001
From: Austin Butler <austinabutler@gmail.com>
Date: Sat, 4 Dec 2021 13:20:57 -0800
Subject: [PATCH] python3Packages.testpath: fix tests on Darwin

---
 pkgs/development/python-modules/testpath/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index be332ac791a2..e11ddeed50a6 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
@@ -17,6 +18,11 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  preCheck = lib.optionalString stdenv.isDarwin ''
+    # Work around https://github.com/jupyter/testpath/issues/24
+    export TMPDIR="/tmp"
+  '';
+
   meta = with lib; {
     description = "Test utilities for code working with files and commands";
     license = licenses.mit;