diff --git a/python-lxml.spec b/python-lxml.spec
index dc61312ef9953def7fa813139fa2aad86cd356b6..5a3392428997085866d4e95db241580c56ea5df1 100644
--- a/python-lxml.spec
+++ b/python-lxml.spec
@@ -7,7 +7,7 @@ The latest release works with all CPython versions from 2.7 to 3.7.
 
 Name:           python-%{modname}
 Version:        4.9.1
-Release:        1
+Release:        2
 Summary:        XML processing library combining libxml2/libxslt with the ElementTree API
 License:        BSD
 URL:            https://github.com/lxml/lxml
@@ -29,6 +29,8 @@ BuildRequires:  python3-devel python3-setuptools python3-Cython
 
 %prep
 %autosetup -n %{modname}-%{version} -p1
+# Remove pregenerated Cython C sources
+find -type f -name '*.c' -print -delete
 
 %build
 export WITH_CYTHON=true
@@ -50,6 +52,9 @@ make test3
 %doc README.rst src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt
 
 %changelog 
+* Mon Jul 25 2022 shixuantong <shixuantong@h-partners.com> - 4.9.1-2
+- Remove pregenerated Cython C sources
+
 * Mon Jul 25 2022 liksh <liks11@chinaunicom.cn> - 4.9.1-1
 - Upgrade to 4.9.1 for openstack yoga