From d2ef0577c5783333d3832bfb312516173b06fb8d Mon Sep 17 00:00:00 2001
From: Tuomas Tynkkynen <tuomas@tuxera.com>
Date: Tue, 30 Aug 2016 18:52:17 +0300
Subject: [PATCH] grail: Fix 'lib.optional' use

Produces a list-of-lists as buildInputs.
---
 pkgs/development/libraries/grail/default.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/grail/default.nix b/pkgs/development/libraries/grail/default.nix
index a4f27824d13..3464e229495 100644
--- a/pkgs/development/libraries/grail/default.nix
+++ b/pkgs/development/libraries/grail/default.nix
@@ -4,13 +4,14 @@
 stdenv.mkDerivation rec {
   name = "grail-${version}";
   version = "3.1.0";
+
   src = fetchurl {
     url = "https://launchpad.net/grail/trunk/${version}/+download/${name}.tar.bz2";
     sha256 = "c26dced1b3f4317ecf6af36db0e90294d87e43966d56aecc4e97b65368ab78b9";
   };
 
   buildInputs = [ pkgconfig python3 frame ]
-  ++ stdenv.lib.optional enableX11 [xorg.libX11 xorg.libXtst xorg.libXext xorg.libXi xorg.libXfixes];
+  ++ stdenv.lib.optionals enableX11 [xorg.libX11 xorg.libXtst xorg.libXext xorg.libXi xorg.libXfixes];
 
   configureFlags = stdenv.lib.optional enableX11 "--with-x11";
 
@@ -20,4 +21,4 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.linux;
   };
-}
\ No newline at end of file
+}