diff --git a/roles/koji_builder/templates/builders/site-defaults.cfg b/roles/koji_builder/templates/builders/site-defaults.cfg
index 7d721e5238..a185fd84e5 100644
--- a/roles/koji_builder/templates/builders/site-defaults.cfg
+++ b/roles/koji_builder/templates/builders/site-defaults.cfg
@@ -4,7 +4,7 @@ config_opts['dnf_common_opts'] = ['--setopt=install_weak_deps=0']
 config_opts['macros']['%bugurl'] = 'https://bugz.fedoraproject.org/%name'
 config_opts['nosync'] = True
 config_opts['nosync_force'] = True
-config_opts['environment']['LANG'] = os.environ.setdefault('LANG', 'C.UTF-8')
+config_opts['environment']['LANG'] = 'C.UTF-8'
 {% if env == 'staging' %}
 ##config_opts['plugin_conf']['tmpfs_enable'] = True
 #config_opts['plugin_conf']['tmpfs_opts'] = {}