From 5f420c1ff583403d12f6af8905c9953f962dbdba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Tue, 21 Feb 2017 18:52:53 +0100
Subject: [PATCH] gvolicon: fixup build with glibc-2.25

---
 pkgs/tools/audio/gvolicon/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/audio/gvolicon/default.nix b/pkgs/tools/audio/gvolicon/default.nix
index 87741cf0ac0..7354b92aaf9 100644
--- a/pkgs/tools/audio/gvolicon/default.nix
+++ b/pkgs/tools/audio/gvolicon/default.nix
@@ -13,7 +13,9 @@ stdenv.mkDerivation {
     librsvg wrapGAppsHook
   ];
 
-  makeFlags="PREFIX=$(out)";
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  NIX_CFLAGS_COMPILE = [ "-D_POSIX_C_SOURCE" ];
 
   meta = {
     description = "A simple and lightweight volume icon that sits in your system tray";