From 04c2b2f52ea8d10d7b669cb26ddebbb45ac47eff Mon Sep 17 00:00:00 2001
From: Robin Gloster <mail@glob.in>
Date: Sat, 26 Oct 2019 15:35:48 +0200
Subject: asciidoc: *Flags are lists

---
 pkgs/tools/typesetting/asciidoc/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/tools/typesetting/asciidoc/default.nix b/pkgs/tools/typesetting/asciidoc/default.nix
index 83aa667f58fd2..44c5f6d1f242c 100644
--- a/pkgs/tools/typesetting/asciidoc/default.nix
+++ b/pkgs/tools/typesetting/asciidoc/default.nix
@@ -259,7 +259,7 @@ stdenv.mkDerivation rec {
   '';
 
   preInstall = "mkdir -p $out/etc/vim";
-  makeFlags = if stdenv.isCygwin then "DESTDIR=/." else null;
+  makeFlags = stdenv.lib.optional stdenv.isCygwin "DESTDIR=/.";
 
   meta = with stdenv.lib; {
     description = "Text-based document generation system";
-- 
cgit 1.4.1