From 144914121c158d2b3c738b74cd4b2e127c1d04f5 Mon Sep 17 00:00:00 2001
From: volth <volth@webmaster.ms>
Date: Thu, 28 Sep 2017 19:15:42 +0000
Subject: [PATCH] mosquitto: fix darwin build (#29851)

---
 pkgs/servers/mqtt/mosquitto/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/servers/mqtt/mosquitto/default.nix b/pkgs/servers/mqtt/mosquitto/default.nix
index b0e05aa8bc0a..c157064fcb2b 100644
--- a/pkgs/servers/mqtt/mosquitto/default.nix
+++ b/pkgs/servers/mqtt/mosquitto/default.nix
@@ -14,12 +14,12 @@ stdenv.mkDerivation rec {
   buildInputs = [ openssl libuuid libwebsockets c-ares libuv ]
     ++ stdenv.lib.optional stdenv.isDarwin cmake;
 
-  makeFlags = [
+  makeFlags = stdenv.lib.optionals stdenv.isLinux [
     "DESTDIR=$(out)"
     "PREFIX="
   ];
 
-  preBuild = ''
+  postPatch = ''
     substituteInPlace config.mk \
       --replace "/usr/local" ""
     substituteInPlace config.mk \