From 20a4a4b5933db55b769d48c532b6bf906738b821 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Sat, 1 Sep 2018 11:57:08 +0200
Subject: [PATCH] pythonPackages.pytest.setupHook: run in correct phase

It was reported that the 2nd solution wasn't working as expected because
it was ran in the wrong phase.

This commit creates a new phase, in between the installCheckPhase and distPhase.
---
 pkgs/development/python-modules/pytest/default.nix | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/python-modules/pytest/default.nix b/pkgs/development/python-modules/pytest/default.nix
index 3770f62f1a5b..6146159ad0ab 100644
--- a/pkgs/development/python-modules/pytest/default.nix
+++ b/pkgs/development/python-modules/pytest/default.nix
@@ -29,9 +29,11 @@ buildPythonPackage rec {
 
   # Remove .pytest_cache when using py.test in a Nix build
   setupHook = writeText "pytest-hook" ''
-    postFixupHooks+=(
-        'find $out -name .pytest_cache -type d -exec rm -rf {} +'
-    )
+    pytestcachePhase() {
+        find $out -name .pytest_cache -type d -exec rm -rf {} +
+    }
+
+    preDistPhases+=" pytestcachePhase"
   '';
 
   meta = with stdenv.lib; {