From 3036e8628491c9471a5927ec8539e232b21361b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 15 Sep 2013 07:55:19 +0200
Subject: [PATCH] libffi on FreeBSD: remove unsupported "-r" option to ln

Done without changing hashes on other platforms.
Sometimes I forget that GNU's not UNIX.
---
 pkgs/development/libraries/libffi/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libffi/default.nix b/pkgs/development/libraries/libffi/default.nix
index 7cd8972672c..9db9b801952 100644
--- a/pkgs/development/libraries/libffi/default.nix
+++ b/pkgs/development/libraries/libffi/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   postInstall =
     # Install headers in the right place.
-    '' ln -srv "$out/lib/"libffi*/include "$out/include"
+    '' ln -s${if stdenv.isFreeBSD then "" else "r"}v "$out/lib/"libffi*/include "$out/include"
     '';
 
   meta = {