From 19d42e0e23a7f90ac2dcc1c279bd23a967ff0314 Mon Sep 17 00:00:00 2001
From: zimoun <zimon.toutoune@gmail.com>
Date: Sun, 18 Oct 2020 00:10:06 +0200
Subject: build-system/haskell: Disable parallel builds.

Fixes <https://bugs.gnu.org/43843>.

* guix/build-system/haskell.scm (haskell-build): Turn off PARALLEL-BUILD? by
default.

Signed-off-by: Marius Bakke <marius@gnu.org>
---
 guix/build-system/haskell.scm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'guix')

diff --git a/guix/build-system/haskell.scm b/guix/build-system/haskell.scm
index 8304e3b222..18a584f782 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 +122,9 @@ version REVISION."
                         (haddock-flags ''())
                         (tests? #t)
                         (test-target "test")
-                        (parallel-build? #t)
+                        ;; FIXME: Parallel builds lead to indeterministic
+                        ;; results, see <http://issues.guix.gnu.org/43843#3>.
+                        (parallel-build? #f)
                         (configure-flags ''())
                         (extra-directories ''())
                         (phases '(@ (guix build haskell-build-system)
-- 
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