From d704ee72c939d6a30dcd1c92bacca2413dbc90fa Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Sun, 12 Feb 2023 03:03:31 +0100
Subject: [PATCH] python3.tests.nixenv-virtualenv: Fix on darwin

The virtualenv mode is trying to be smart and checks whether it can
write to $out, which for some reason fails on darwin.

> virtualenv: error: argument dest: the destination . is not write-able at /nix/store

But what does work is creating it in the pwd and moving it to $out,
because mv just does what it is told.
---
 pkgs/development/interpreters/python/tests.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/python/tests.nix b/pkgs/development/interpreters/python/tests.nix
index 6282b0f6690e..4ba1b757c3f6 100644
--- a/pkgs/development/interpreters/python/tests.nix
+++ b/pkgs/development/interpreters/python/tests.nix
@@ -43,7 +43,8 @@ let
       # Use virtualenv from a Nix env.
       nixenv-virtualenv = rec {
         env = runCommand "${python.name}-virtualenv" {} ''
-          ${pythonVirtualEnv.interpreter} -m virtualenv $out
+          ${pythonVirtualEnv.interpreter} -m virtualenv venv
+          mv venv $out
         '';
         interpreter = "${env}/bin/${python.executable}";
         is_venv = "False";