From d7039d5029f248617e5e29c6d981e89e5b1bec78 Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Thu, 16 Nov 2017 22:57:34 +0100
Subject: [PATCH] libmpack: fix darwin build

On darwin we need the correct prefix during the buildPhase, otherwise
the dynamic libraries have an incorrect install_name.
---
 pkgs/development/libraries/libmpack/default.nix | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/libraries/libmpack/default.nix b/pkgs/development/libraries/libmpack/default.nix
index e9bc2a646b71..2754c726da2b 100644
--- a/pkgs/development/libraries/libmpack/default.nix
+++ b/pkgs/development/libraries/libmpack/default.nix
@@ -9,11 +9,11 @@ stdenv.mkDerivation rec {
     rev = version;
     sha256 = "0rai5djdkjz7bsn025k5489in7r1amagw1pib0z4qns6b52kiar2";
   };
-  LIBTOOL = "libtool";
-  buildInputs = [ libtool ];
-  preInstall = ''
-    export PREFIX=$out
-  '';
+
+  nativeBuildInputs = [ libtool ];
+
+  makeFlags = [ "LIBTOOL=libtool" "PREFIX=$(out)" ];
+
   meta = with stdenv.lib; {
     description = "Simple implementation of msgpack in C";
     homepage = https://github.com/tarruda/libmpack/;