From 93005b82dc4f6e2f5372987005d7dffd2f1b3ea6 Mon Sep 17 00:00:00 2001
From: Dan Peebles <pumpkin@me.com>
Date: Tue, 21 Mar 2017 00:42:26 -0400
Subject: [PATCH] google-gflags: fix on Darwin

e721905d0f7c82be94a347f022bdd238b919de9d updated to a version that added
a BUILD file that breaks on case-insensitive filesystems.
---
 pkgs/development/libraries/google-gflags/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/google-gflags/default.nix b/pkgs/development/libraries/google-gflags/default.nix
index 0f089d16ead..1a3a1658727 100644
--- a/pkgs/development/libraries/google-gflags/default.nix
+++ b/pkgs/development/libraries/google-gflags/default.nix
@@ -13,6 +13,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
+  # This isn't used by the build and breaks the CMake build on case-insensitive filesystems (e.g., on Darwin)
+  preConfigure = "rm BUILD";
+
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_STATIC_LIBS=ON"