From 4cbbecc85dbc5a040f2e4111093d30337718996a Mon Sep 17 00:00:00 2001
From: Orivej Desh <orivej@gmx.fr>
Date: Wed, 29 Nov 2017 10:53:01 +0000
Subject: [PATCH] libretro.mame: fix parallel building

---
 pkgs/misc/emulators/retroarch/cores.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/misc/emulators/retroarch/cores.nix b/pkgs/misc/emulators/retroarch/cores.nix
index c186b1a2cf1..605cb7261a2 100644
--- a/pkgs/misc/emulators/retroarch/cores.nix
+++ b/pkgs/misc/emulators/retroarch/cores.nix
@@ -204,7 +204,7 @@ in
     description = "Enhanced Genesis Plus libretro port";
   };
 
-  mame = mkLibRetroCore {
+  mame = (mkLibRetroCore {
     core = "mame";
     src = fetchRetro {
       repo = "mame";
@@ -214,6 +214,12 @@ in
     description = "Port of MAME to libretro";
 
     extraBuildInputs = [ alsaLib mesa portaudio python27 xorg.libX11 ];
+  }).override {
+    postPatch = ''
+      # Prevent the failure during the parallel building of:
+      # make -C 3rdparty/genie/build/gmake.linux -f genie.make obj/Release/src/host/lua-5.3.0/src/lgc.o
+      mkdir -p 3rdparty/genie/build/gmake.linux/obj/Release/src/host/lua-5.3.0/src
+    '';
   };
 
   mgba = mkLibRetroCore rec {