From eeff6c493373d3fff11421b55309fab6a1d4ec7d Mon Sep 17 00:00:00 2001
From: 06kellyjac <dev@j-k.io>
Date: Thu, 12 May 2022 10:02:33 +0100
Subject: [PATCH] systemd: fix reproducibility of dbus interface xml

systemd's `--bus-introspect` was generating nondeterministic xml which
is saved into our build outputs
---
 pkgs/os-specific/linux/systemd/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/os-specific/linux/systemd/default.nix b/pkgs/os-specific/linux/systemd/default.nix
index 5d7ffe2d919..14d5e29c372 100644
--- a/pkgs/os-specific/linux/systemd/default.nix
+++ b/pkgs/os-specific/linux/systemd/default.nix
@@ -178,6 +178,13 @@ stdenv.mkDerivation {
     # need (AFAICT).
     # See https://github.com/systemd/systemd/pull/20479 for upstream discussion.
     ./0019-core-handle-lookup-paths-being-symlinks.patch
+
+    # fixes reproducability of dbus xml files
+    # Should no longer be necessary with v251.
+    (fetchpatch {
+      url = "https://github.com/systemd/systemd/pull/22174.patch";
+      sha256 = "sha256-RVhxUEUiISgRlIP/AhU+w1VHfDQw2W16cFl2TXXyxno=";
+    })
   ] ++ lib.optional stdenv.hostPlatform.isMusl (
     let
       oe-core = fetchzip {