From 970393c34a14e32d10d747eb08e4ebbecba9b390 Mon Sep 17 00:00:00 2001
From: xeji <36407913+xeji@users.noreply.github.com>
Date: Wed, 19 Sep 2018 16:15:02 +0200
Subject: [PATCH] pythonPackages.nilearn: fix test_signal tests (#46850)

These tests failed on some machines, probably due to lower arithmetic
presicion. Reduce required precision from 13 to 8 decimal digits.
---
 pkgs/development/python-modules/nilearn/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/python-modules/nilearn/default.nix b/pkgs/development/python-modules/nilearn/default.nix
index bf8ae217705c..14bb15184b59 100644
--- a/pkgs/development/python-modules/nilearn/default.nix
+++ b/pkgs/development/python-modules/nilearn/default.nix
@@ -19,6 +19,13 @@ buildPythonPackage rec {
 
   checkInputs = [ nose ];
 
+  # These tests fail on some builder machines, probably due to lower
+  # arithmetic precision. Reduce required precision from 13 to 8 decimals.
+  postPatch = ''
+    substituteInPlace nilearn/tests/test_signal.py \
+      --replace 'decimal=13' 'decimal=8'
+  '';
+
   propagatedBuildInputs = [
     matplotlib
     nibabel