diff --git a/mock.spec b/mock.spec
index 56b22f88c327ad22b830e66ebd6f24f58a434b76..b55e724e2cfd51b20ac1d780f4847fb3316a2314 100644
--- a/mock.spec
+++ b/mock.spec
@@ -8,7 +8,7 @@
 Summary: Builds packages inside chroots
 Name: mock
 Version: 5.6
-Release: 3
+Release: 4
 License: GPL-2.0-or-later
 Source:  https://github.com/rpm-software-management/mock/releases/download/mock-2.2-1/%{name}-%{version}.tar.gz
 URL: https://github.com/rpm-software-management/mock/
@@ -176,6 +176,9 @@ install -p -m 0644 docs/site-defaults.cfg %{buildroot}%{_pkgdocdir}
 sed -i 's/^_MOCK_NVR = None$/_MOCK_NVR = "%name-%version-%release"/' \
     %{buildroot}%{_libexecdir}/mock/mock
 
+%pre filesystem
+getent group 'mock' >/dev/null || groupadd -f -g '135' -r 'mock' || :
+
 %check
 %if %{with lint}
 # ignore the errors for now, just print them and hopefully somebody will fix it one day
@@ -242,6 +245,9 @@ pylint-3 py/mockbuild/ py/*.py py/mockbuild/plugins/* || :
 %dir  %{_datadir}/cheat
 
 %changelog
+* Wed Nov 12 2025 wangqing <wangqing@uniontech.com> - 5.6-4
+- fix: ERROR: "getgrnam(): name not found: 'mock'"
+
 * Mon May 26 2025 samshichao <shichao@teligen.net> - 5.6-3
 - Add installation dependencies