From 06eff8c02e22f583c252976f44db41554805293b Mon Sep 17 00:00:00 2001
From: zimoun <zimon.toutoune@gmail.com>
Date: Thu, 15 Oct 2020 14:02:09 +0200
Subject: [PATCH] build-system/haskell: Disable parallel builds.

Parallel builds introduced by commit 67cb9fa2357026ee42ec5bb0923ec4dc4a43abe2
leads to unreproducibility.  Instead of reverting, default is set to #false
which allows user to locally build with parallelism.

* guix/build-system/haskell.scm (haskell-build): Turn off PARALLEL-BUILD? by
default.
---
 guix/build-system/haskell.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/guix/build-system/haskell.scm b/guix/build-system/haskell.scm
index 8304e3b222..328d1139b0 100644
--- a/guix/build-system/haskell.scm
+++ b/guix/build-system/haskell.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
 ;;; Copyright © 2020 Timothy Sample <samplet@ngyro.com>
+;;; Copyright © 2020 Simon Tournier <zimon.toutoune@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -121,7 +122,7 @@ version REVISION."
                         (haddock-flags ''())
                         (tests? #t)
                         (test-target "test")
-                        (parallel-build? #t)
+                        (parallel-build? #f)
                         (configure-flags ''())
                         (extra-directories ''())
                         (phases '(@ (guix build haskell-build-system)

base-commit: 7269a591361138ac6fc122d465e45e2b8c4944be
-- 
2.28.0