From 1fae9a36aa0c1dc5ac4521fe9cce2218a13e5845 Mon Sep 17 00:00:00 2001
From: Thomas Tuegel <ttuegel@gmail.com>
Date: Fri, 11 Mar 2016 09:12:39 -0600
Subject: [PATCH] ppp: fix evaluation error on Darwin

---
 pkgs/tools/networking/ppp/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/tools/networking/ppp/default.nix b/pkgs/tools/networking/ppp/default.nix
index 7d3ced17b40..0f5de17c71b 100644
--- a/pkgs/tools/networking/ppp/default.nix
+++ b/pkgs/tools/networking/ppp/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     [ ( substituteAll {
         src = ./nix-purity.patch;
         inherit libpcap;
-        glibc = stdenv.cc.libc.dev;
+        glibc = stdenv.cc.libc.dev or stdenv.cc.libc;
       })
       # Without nonpriv.patch, pppd --version doesn't work when not run as
       # root.