From 2c8960d85f6f5afc0a8204351380a495e6c1f064 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Sun, 30 Jul 2017 10:19:02 +0200
Subject: [PATCH] python.pkgs.numpy: enable parallel building

---
 pkgs/development/python-modules/numpy/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/python-modules/numpy/default.nix b/pkgs/development/python-modules/numpy/default.nix
index 965dda8c43a..75b946b4051 100644
--- a/pkgs/development/python-modules/numpy/default.nix
+++ b/pkgs/development/python-modules/numpy/default.nix
@@ -21,6 +21,7 @@ buildPythonPackage rec {
 
   preConfigure = ''
     sed -i 's/-faltivec//' numpy/distutils/system_info.py
+    export NPY_NUM_BUILD_JOBS=$NIX_BUILD_CORES
   '';
 
   preBuild = ''
@@ -32,6 +33,8 @@ buildPythonPackage rec {
     EOF
   '';
 
+  enableParallelBuilding = true;
+
   checkPhase = ''
     runHook preCheck
     pushd dist