From 8e89d68448770c4b47621f15c961dfbb6488b403 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sat, 27 Nov 2021 12:27:36 +0000
Subject: [PATCH] gsl_1: enable parallel building

Had to pull upstream fix that fixes parallel test runs.
---
 pkgs/development/libraries/gsl/gsl-1_16.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/libraries/gsl/gsl-1_16.nix b/pkgs/development/libraries/gsl/gsl-1_16.nix
index d26651875756..4370314f6ec3 100644
--- a/pkgs/development/libraries/gsl/gsl-1_16.nix
+++ b/pkgs/development/libraries/gsl/gsl-1_16.nix
@@ -17,8 +17,15 @@ stdenv.mkDerivation rec {
       url = "https://git.savannah.gnu.org/cgit/gsl.git/patch/?id=9cc12d";
       sha256 = "1bmrmihi28cly9g9pq54kkix2jy59y7cd7h5fw4v1c7h5rc2qvs8";
     })
+
+    (fetchpatch {
+      name = "fix-parallel-test.patch";
+      url = "https://git.savannah.gnu.org/cgit/gsl.git/patch/?id=12654373c3b60541230921aae81f93b484ec5eaf";
+      sha256 = "1flzpbsfj7gjywv6v9qvm8wpdrkbpj7shryinfdpb40y7si9njdw";
+    })
   ];
 
+  enableParallelBuilding = true;
   doCheck = true;
 
   meta = {