diff --git a/flow-tools.spec b/flow-tools.spec
index bf26ac4..a6cf761 100644
--- a/flow-tools.spec
+++ b/flow-tools.spec
@@ -12,8 +12,9 @@
 Version: 0.68.5.1
 Name: flow-tools
 Summary: Tool set for working with NetFlow data
-Release: 38%{?dist}
-License: BSD 
+Release: 45%{?dist}
+# Automatically converted from old format: BSD - review is highly recommended.
+License: LicenseRef-Callaway-BSD 
 URL: http://code.google.com/p/%{name}/
 Source0: http://%{name}.googlecode.com/files/%{name}-%{version}.tar.bz2
 Source1: flow-capture.service
@@ -34,13 +35,10 @@ BuildRequires: bison
 BuildRequires: flex
 BuildRequires: doxygen
 %if 0%{?fedora} >= 31
-BuildRequires: /usr/bin/2to3
+BuildRequires: python3.12
 %endif
-Requires(pre): shadow-utils
 BuildRequires: systemd-rpm-macros
 BuildRequires: make
-Provides: group(%username)
-Provides: user(%username)
 
 
 %description
@@ -110,7 +108,7 @@ This package contains additional documentation, such as man pages in html format
 # Remove /bin/env deps
 %if 0%{?fedora} >= 31
 sed -i '1s|^#!.*python|#!/usr/bin/python3|' bin/flow*
-2to3 --write --nobackups bin/flow*
+python3.12 -m lib2to3 --write --nobackups bin/flow*
 %else
 sed -i '1s|^#!.*python|#!/usr/bin/python2|' bin/flow*
 %endif
@@ -118,7 +116,13 @@ sed -i '1s|^#!.*perl|#!/usr/bin/perl|' utils/*
 # Fix mariadb-connector-c detection
 sed -i s/my_init/mysql_init/g configure
 
+# Create a sysusers.d config file
+cat >flow-tools.sysusers.conf <<EOF
+u flow-tools - '%{gecos}' %{homedir} -
+EOF
+
 %build
+export CFLAGS="$CFLAGS -std=gnu17"
 %configure \
   --localstatedir=%{_localstatedir}/%{name} \
   --sysconfdir=%{_sysconfdir}/%{name} \
@@ -143,12 +147,8 @@ install -m 0644 %SOURCE1 $RPM_BUILD_ROOT%{_unitdir}/flow-capture.service
 install -d $RPM_BUILD_ROOT%{_sysconfdir}/sysconfig
 install -m 0644 %SOURCE2 $RPM_BUILD_ROOT%{_sysconfdir}/sysconfig/flow-capture
 
-%pre
-getent group %{username} >/dev/null || groupadd -r %{username}
-getent passwd %{username} >/dev/null || \
-    useradd -r -g %{username} -d %{homedir} -s /sbin/nologin \
-    -c '%{gecos}' %{username}
-exit 0
+install -m0644 -D flow-tools.sysusers.conf %{buildroot}%{_sysusersdir}/flow-tools.conf
+
 
 
 %post
@@ -220,6 +220,7 @@ exit 0
 %attr(-,flow-tools,flow-tools) %{_localstatedir}/%{name}/
 %dir %{_datadir}/%{name}/
 %{_datadir}/%{name}/*
+%{_sysusersdir}/flow-tools.conf
 
 %files devel
 %{_libdir}/*.so
@@ -235,6 +236,27 @@ exit 0
 %doc docs/*.html ChangeLog.old TODO INSTALL SECURITY
 
 %changelog
+* Wed Jul 23 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-45
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Tue Feb 11 2025 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 0.68.5.1-44
+- Add sysusers.d config file to allow rpm to create users/groups automatically
+
+* Thu Jan 16 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-43
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
+* Wed Aug 28 2024 Miroslav Suchý <msuchy@redhat.com> - 0.68.5.1-42
+- convert license to SPDX
+
+* Wed Jul 17 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-41
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild
+
+* Wed Jan 24 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-40
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Fri Jan 19 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-39
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
 * Wed Jul 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 0.68.5.1-38
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild