From 6c7fbcd21e7e137f4fde9a5c4acaec1d2b594b94 Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Mon, 4 Jul 2022 16:45:54 +0200
Subject: [PATCH] mailman: make `mailmanPackages.extend` actually work in
 overlays

---
 pkgs/servers/mail/mailman/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index d887d91d20f6..77dbef745c8d 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -1,9 +1,9 @@
 { newScope, lib, python3 }:
 
 let
-  callPackage = newScope self;
+  self = lib.makeExtensible (self: let inherit (self) callPackage; in {
+    callPackage = newScope self;
 
-  self = lib.makeExtensible (self: {
     python3 = callPackage ./python.nix { inherit python3; };
 
     hyperkitty = callPackage ./hyperkitty.nix { };