From 55c8891426d289545e732ad3bf3eda82381dc8df Mon Sep 17 00:00:00 2001
From: Robin Gloster <mail@glob.in>
Date: Thu, 19 Jan 2017 02:18:03 +0100
Subject: [PATCH] libe-book: fix build with gcc6

---
 pkgs/development/libraries/libe-book/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/libraries/libe-book/default.nix b/pkgs/development/libraries/libe-book/default.nix
index 02195dede93..1e374b8ad1f 100644
--- a/pkgs/development/libraries/libe-book/default.nix
+++ b/pkgs/development/libraries/libe-book/default.nix
@@ -28,6 +28,7 @@ stdenv.mkDerivation {
   src = fetchurl {
     inherit (s) url sha256;
   };
+  NIX_CFLAGS_COMPILE = "-Wno-error=unused-function";
   meta = {
     inherit (s) version;
     description = ''Library for import of reflowable e-book formats'';