From b65181d78b61464966da493a635004fbc3161a70 Mon Sep 17 00:00:00 2001
From: Matthew Pickering <matthewtpickering@gmail.com>
Date: Fri, 13 Apr 2018 00:03:31 +0100
Subject: [PATCH] grass: Fix Can't load GDAL library errors on darwin

It is required to pass this extra flag to the build to avoid trying to
dynamically load the library.
---
 pkgs/applications/gis/grass/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/applications/gis/grass/default.nix b/pkgs/applications/gis/grass/default.nix
index 8353bce1b84..3e0089efa6d 100644
--- a/pkgs/applications/gis/grass/default.nix
+++ b/pkgs/applications/gis/grass/default.nix
@@ -35,6 +35,9 @@ stdenv.mkDerivation {
     "--with-blas"
   ];
 
+  # Otherwise a very confusing "Can't load GDAL library" error
+  makeFlags = stdenv.lib.optional stdenv.isDarwin "GDAL_DYNAMIC=";
+
   /* Ensures that the python script run at build time are actually executable;
    * otherwise, patchShebangs ignores them.  */
   postConfigure = ''