From 70867a92f6d8a43f03b03eee93c7eff885a76368 Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Tue, 2 Apr 2019 17:13:18 +0200
Subject: [PATCH] arpack: fix tests on darwin

---
 pkgs/development/libraries/science/math/arpack/default.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 8541384e831..05373cd1cbd 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -28,8 +28,11 @@ stdenv.mkDerivation {
     "-DINTERFACE64=${optionalString openblas.blas64 "1"}"
   ];
 
-  preCheck = ''
+  preCheck = if stdenv.isDarwin then ''
+    export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:`pwd`/lib
+  '' else ''
     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd`/lib
+  '' + ''
     # Prevent tests from using all cores
     export OMP_NUM_THREADS=2
   '';