From 38a2056f7042905efafcfa3044608006df89197f Mon Sep 17 00:00:00 2001
From: Aristid Breitkreuz <aristidb@gmail.com>
Date: Tue, 9 Jul 2013 20:53:45 +0200
Subject: [PATCH] fix bug in perf-linux installation, oops

---
 pkgs/os-specific/linux/kernel/perf.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/kernel/perf.nix b/pkgs/os-specific/linux/kernel/perf.nix
index 83de0effcec..04924f013a4 100644
--- a/pkgs/os-specific/linux/kernel/perf.nix
+++ b/pkgs/os-specific/linux/kernel/perf.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
   preConfigure = ''
     cd tools/perf
     sed -i s,/usr/include/elfutils,$elfutils/include/elfutils, Makefile
-    -f bash_completion && sed -i 's,^have perf,_have perf,' bash_completion
+    [ -f bash_completion ] && sed -i 's,^have perf,_have perf,' bash_completion
     export makeFlags="DESTDIR=$out $makeFlags"
   '';