diff --git a/debian.rules b/debian.rules
index 953462f..1f0fbb5 100644
--- a/debian.rules
+++ b/debian.rules
@@ -1,3 +1,11 @@
 #!/usr/bin/make -f
 %:
 	dh $@ --parallel
+sudir = usr/lib/sysusers.d
+sufile = ${sudir}/system-user-gromox.conf
+override_dh_auto_install:
+	mkdir -p ${sudir}
+	echo 'g gromox -' >${sufile}
+	echo 'g gromoxcf -' >>${sufile}
+	echo 'u gromox - "Gromox services"' >>${sufile}
+	echo 'm gromox gromoxcf' >>${sufile}
diff --git a/debian.system-user-gromox.install b/debian.system-user-gromox.install
index 473a0f4..2e6dbc0 100644
--- a/debian.system-user-gromox.install
+++ b/debian.system-user-gromox.install
@@ -0,0 +1 @@
+usr/
diff --git a/debian.system-user-gromox.postinst b/debian.system-user-gromox.postinst
index 0cbf6d4..eed5fa2 100644
--- a/debian.system-user-gromox.postinst
+++ b/debian.system-user-gromox.postinst
@@ -1,6 +1,14 @@
 #!/bin/sh
-getent group gromox >/dev/null || addgroup --system gromox
-getent group gromoxcf >/dev/null || addgroup --system gromoxcf
-getent passwd gromox >/dev/null || \
-	adduser --system gromox --home /var/lib/gromox --no-create-home --disabled-password --ingroup gromox
-usermod gromox -aG gromoxcf
+case "$1" in
+configure|reconfigure)
+	if [ -x /usr/bin/systemd-sysusers ]; then
+		/usr/bin/systemd-sysusers system-user-gromox.conf
+	else
+		getent group gromox >/dev/null || addgroup --system gromox
+		getent group gromoxcf >/dev/null || addgroup --system gromoxcf
+		getent passwd gromox >/dev/null || \
+			adduser --system gromox --home /var/lib/gromox --no-create-home --disabled-password --ingroup gromox
+		usermod gromox -aG gromoxcf
+	fi
+	;;
+esac
diff --git a/system-user-gromox.changes b/system-user-gromox.changes
index 9ed4262..e66a6ba 100644
--- a/system-user-gromox.changes
+++ b/system-user-gromox.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Sep  4 19:28:11 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 9
+  * Switch to sysusers mechanism on Debian as well
+
 -------------------------------------------------------------------
 Tue Jun  4 08:06:05 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/system-user-gromox.dsc b/system-user-gromox.dsc
index 15c9111..e716e56 100644
--- a/system-user-gromox.dsc
+++ b/system-user-gromox.dsc
@@ -1,7 +1,7 @@
 Format: 1.0
 Source: system-user-gromox
 Architecture: all
-Version: 6
+Version: 9
 Maintainer: Gromox <null@gromox.com>
 Homepage: https://grommunio.com
 Standards-Version: 3.9.4
diff --git a/system-user-gromox.spec b/system-user-gromox.spec
index dffc585..fb3f2d3 100644
--- a/system-user-gromox.spec
+++ b/system-user-gromox.spec
@@ -17,7 +17,7 @@
 
 
 Name:           system-user-gromox
-Version:        7
+Version:        9
 Release:        0
 Summary:        System user and group gromox
 License:        MIT
@@ -46,10 +46,6 @@ This package provides:
 %prep
 
 %build
-# The conf file is provided by system-user-gromox rather than
-# gromox.spec so that e.g. grommunio-admin-api does not grow a
-# BuildRequire on gromox (wait times).
-#
 >user.pre
 %if 0%{?suse_version}
 %sysusers_generate_pre %_sourcedir/system-user-gromox.conf user system-user-gromox.conf