https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/814d409501aca3e044ad53063eb3f433b8aff6f9.patch

From 814d409501aca3e044ad53063eb3f433b8aff6f9 Mon Sep 17 00:00:00 2001
From: Timo Gurr <timo.gurr@gmail.com>
Date: Thu, 6 Jan 2022 12:17:10 +0000
Subject: [PATCH] systemd: Add systemd-system-unit-dir override

--- a/meson_options.txt
+++ b/meson_options.txt
@@ -179,6 +179,9 @@ option('udev',
 option('udevrulesdir',
        type : 'string',
        description : 'Directory for udev rules (defaults to /lib/udev/rules.d)')
+option('systemd-system-unit-dir',
+       type : 'string',
+       description : 'Directory for system systemd units (defaults to /usr/lib/systemd/system)')
 option('systemd-user-unit-dir',
        type : 'string',
        description : 'Directory for user systemd units (defaults to /usr/lib/systemd/user)')
--- a/src/daemon/systemd/system/meson.build
+++ b/src/daemon/systemd/system/meson.build
@@ -1,4 +1,7 @@
 systemd_system_services_dir = systemd.get_variable(pkgconfig: 'systemdsystemunitdir', pkgconfig_define : [ 'rootprefix', prefix])
+if get_option('systemd-system-unit-dir') != ''
+  systemd_system_services_dir = get_option('systemd-system-unit-dir')
+endif
 
 install_data(sources : 'pipewire.socket',
              install_dir : systemd_system_services_dir)
GitLab