From d2282cc4a78f372e4c56238c8bbd434aa1f9e76c Mon Sep 17 00:00:00 2001
From: Arthur Lee <me@arthur.li>
Date: Fri, 25 Oct 2019 11:47:50 +0800
Subject: [PATCH] wt: Allow optional library harfbuzz to be overriden with null

---
 pkgs/development/libraries/wt/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/wt/default.nix b/pkgs/development/libraries/wt/default.nix
index b5a7bae68ead..0bffa8ba1a56 100644
--- a/pkgs/development/libraries/wt/default.nix
+++ b/pkgs/development/libraries/wt/default.nix
@@ -28,13 +28,14 @@ let
 
       cmakeFlags = [
         "-DWT_CPP_11_MODE=-std=c++11"
-        "-DHARFBUZZ_INCLUDE_DIR=${harfbuzz.dev}/include"
         "--no-warn-unused-cli"
       ]
       ++ stdenv.lib.optionals (graphicsmagick != null) [
         "-DWT_WRASTERIMAGE_IMPLEMENTATION=GraphicsMagick"
         "-DGM_PREFIX=${graphicsmagick}"
       ]
+      ++ stdenv.lib.optional (harfbuzz != null)
+        "-DHARFBUZZ_INCLUDE_DIR=${harfbuzz.dev}/include"
       ++ stdenv.lib.optional (libmysqlclient != null)
         "-DMYSQL_PREFIX=${libmysqlclient}";