From 838781ce8a2dc1f62689f2840ce45812862443a5 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Thu, 21 Jul 2016 11:42:28 +0100
Subject: [PATCH] buildRubyGem: fix buildFlags default attribute

lib.escapeShellArgs doesn't work well when a null value is provided.

[] is also the correct value since it's really just an empty list of
arguments that we have.
---
 pkgs/development/ruby-modules/gem/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/ruby-modules/gem/default.nix b/pkgs/development/ruby-modules/gem/default.nix
index 74dc64000c0..8015fb1f6d0 100644
--- a/pkgs/development/ruby-modules/gem/default.nix
+++ b/pkgs/development/ruby-modules/gem/default.nix
@@ -48,7 +48,7 @@ lib.makeOverridable (
 , dontBuild ? true
 , propagatedBuildInputs ? []
 , propagatedUserEnvPkgs ? []
-, buildFlags ? null
+, buildFlags ? []
 , passthru ? {}
 , ...} @ attrs: