From 179936d75c7b8aa34cdf40b49c959b0b156e5ee1 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Wed, 28 Jun 2017 13:34:21 -0500
Subject: [PATCH] mailman: Fix attempts to chmod g+s during installation

---
 pkgs/servers/mail/mailman/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index b18ab016c441..3c028b1ac170 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
 
   installTargets = "doinstall";         # Leave out the 'update' target that's implied by 'install'.
 
+  makeFlags = [ "DIRSETGID=:" ];
+
   meta = {
     homepage = "http://www.gnu.org/software/mailman/";
     description = "Free software for managing electronic mail discussion and e-newsletter lists";