From d385b8f5972d4a0885c29c6bac87471bf622c133 Mon Sep 17 00:00:00 2001
From: Luke Granger-Brown <git@lukegb.com>
Date: Sat, 24 Apr 2021 01:10:47 +0000
Subject: [PATCH] python3Packages.tensorflow: mark as requiring big-parallel

The Bazel build part of tensorflow builds can really use as many cores
as is available - to avoid blocking a small machine for literally hours
while it churns away, mark the build as big-parallel so we can schedule
it to run quickly on a machine with lots of cores.
---
 pkgs/development/python-modules/tensorflow/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/python-modules/tensorflow/default.nix b/pkgs/development/python-modules/tensorflow/default.nix
index 0e2df1a4678..0216c05eeac 100644
--- a/pkgs/development/python-modules/tensorflow/default.nix
+++ b/pkgs/development/python-modules/tensorflow/default.nix
@@ -325,6 +325,10 @@ let
           addOpenGLRunpath "$lib"
         done
       '';
+
+      requiredSystemFeatures = [
+        "big-parallel"
+      ];
     };
 
     meta = with lib; {