From 7cc5d84cd79c31db524acd31556cf97675e7596d Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Mon, 10 Feb 2020 18:06:54 -0500
Subject: [PATCH] libtasn1: fix on darwin

Test binaries are linked to the libraries at their install path, but
those are not installed when checkPhase executes.
---
 pkgs/development/libraries/libtasn1/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/libraries/libtasn1/default.nix b/pkgs/development/libraries/libtasn1/default.nix
index 215d67dc0b1..d266817c5d7 100644
--- a/pkgs/development/libraries/libtasn1/default.nix
+++ b/pkgs/development/libraries/libtasn1/default.nix
@@ -14,6 +14,10 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ texinfo perl ];
 
   doCheck = true;
+  preCheck = if stdenv.isDarwin then
+    "export DYLD_LIBRARY_PATH=`pwd`/lib/.libs"
+  else
+    null;
 
   meta = with stdenv.lib; {
     homepage = https://www.gnu.org/software/libtasn1/;