From 812d17f177e3013e9088b716c45866ce4d32d967 Mon Sep 17 00:00:00 2001
From: Austin Seipp <aseipp@pobox.com>
Date: Sun, 2 Mar 2014 05:53:08 -0600
Subject: [PATCH] ktap: don't use FFI by default

It's not yet supported on i386 - instead, make it optional and
controlled by a `useFFI` attribute.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
---
 pkgs/os-specific/linux/ktap/default.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkgs/os-specific/linux/ktap/default.nix b/pkgs/os-specific/linux/ktap/default.nix
index 7a54f0aeebe..54209673359 100644
--- a/pkgs/os-specific/linux/ktap/default.nix
+++ b/pkgs/os-specific/linux/ktap/default.nix
@@ -1,5 +1,8 @@
-{ stdenv, fetchgit, kernel }:
+{ stdenv, fetchgit, kernel, useFFI ? false }:
 
+let
+  ffiArgs = stdenv.lib.optionalString useFFI "FFI=1";
+in
 stdenv.mkDerivation rec {
   name = "ktap-${version}";
   version = "0.5-e7a38ef0";
@@ -10,7 +13,7 @@ stdenv.mkDerivation rec {
   };
 
   buildPhase = ''
-    make FFI=1 KERNEL_SRC=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build
+    make ${ffiArgs} KERNEL_SRC=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build
   '';
 
   installPhase = ''