From aaffbf925cecbe3de2c85f3e564e69221e29e440 Mon Sep 17 00:00:00 2001
From: Brian Leung <leungbk@posteo.net>
Date: Wed, 13 Apr 2022 21:53:01 -0700
Subject: [PATCH] spdlog: fix build on aarch64-darwin

---
 pkgs/development/libraries/spdlog/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/spdlog/default.nix b/pkgs/development/libraries/spdlog/default.nix
index d129f47cd26..5a21af12e33 100644
--- a/pkgs/development/libraries/spdlog/default.nix
+++ b/pkgs/development/libraries/spdlog/default.nix
@@ -36,7 +36,11 @@ let
       '';
 
       doCheck = true;
-      preCheck = "export LD_LIBRARY_PATH=$(pwd)\${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH";
+      preCheck =  if stdenv.isDarwin then ''
+        export DYLD_LIBRARY_PATH="$(pwd)''${DYLD_LIBRARY_PATH:+:}$DYLD_LIBRARY_PATH"
+      '' else ''
+        export LD_LIBRARY_PATH="$(pwd)''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH"
+      '';
 
       meta = with lib; {
         description    = "Very fast, header only, C++ logging library";