From 5668e3911c93392b6f68935003bda492711c550b Mon Sep 17 00:00:00 2001
From: "William A. Kennington III" <william@wkennington.com>
Date: Thu, 18 Jun 2015 22:34:29 -0700
Subject: [PATCH] efivar: Fix linking against libdl

---
 pkgs/tools/system/efivar/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/tools/system/efivar/default.nix b/pkgs/tools/system/efivar/default.nix
index 4ba747bda1a..d0c84d52daa 100644
--- a/pkgs/tools/system/efivar/default.nix
+++ b/pkgs/tools/system/efivar/default.nix
@@ -13,6 +13,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ popt ];
 
+  # 0.20 Relies on symbols from libdl.so which breaks efibootmgr
+  NIX_LDFLAGS = "-ldl";
+
   installFlags = [
     "libdir=$(out)/lib"
     "mandir=$(out)/share/man"