From a2eb1f4bd68c42610451c5c217b4ab0355a7298c Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Fri, 22 Sep 2017 14:00:46 -0500
Subject: [PATCH] openntpd: patch missing includes to cdefs, fix build on musl

---
 pkgs/tools/networking/openntpd/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/tools/networking/openntpd/default.nix b/pkgs/tools/networking/openntpd/default.nix
index 7e1c257ec4b..d63df830d0e 100644
--- a/pkgs/tools/networking/openntpd/default.nix
+++ b/pkgs/tools/networking/openntpd/default.nix
@@ -12,6 +12,11 @@ stdenv.mkDerivation rec {
     sha256 = "1g6hi03ylhv47sbar3xxgsrar8schqfwn4glckh6m6lni67ndq85";
   };
 
+  prePatch = ''
+    sed -i '20i#include <sys/cdefs.h>' src/ntpd.h
+    sed -i '19i#include <sys/cdefs.h>' src/log.c
+  '';
+
   configureFlags = [
     "--with-privsep-path=${privsepPath}"
     "--with-privsep-user=${privsepUser}"