From b5148cec8f18a1d36d3882d8dbed7e2a09a4db31 Mon Sep 17 00:00:00 2001
From: Orivej Desh <orivej@gmx.fr>
Date: Fri, 17 Nov 2017 22:44:01 +0000
Subject: [PATCH] libjson-rpc-cpp: enable parallel building

---
 pkgs/development/libraries/libjson-rpc-cpp/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libjson-rpc-cpp/default.nix b/pkgs/development/libraries/libjson-rpc-cpp/default.nix
index 7c0bc358ea9c..87cae2246852 100644
--- a/pkgs/development/libraries/libjson-rpc-cpp/default.nix
+++ b/pkgs/development/libraries/libjson-rpc-cpp/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
              -DCMAKE_BUILD_TYPE=Release
   '';
 
-  installPhase = '' 
+  installPhase = ''
     mkdir -p $out
 
     function fixRunPath {
@@ -56,6 +56,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ cmake jsoncpp argtable curl libmicrohttpd doxygen catch ];
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "C++ framework for json-rpc (json remote procedure call)";
     homepage = https://github.com/cinemast/libjson-rpc-cpp;