diff --git a/roles/koji_builder/files/builders/site-defaults.cfg b/roles/koji_builder/files/builders/site-defaults.cfg
index 4264edddba..f0484a35e7 100644
--- a/roles/koji_builder/files/builders/site-defaults.cfg
+++ b/roles/koji_builder/files/builders/site-defaults.cfg
@@ -1,2 +1,3 @@
 config_opts['plugin_conf']['package_state_enable'] = False
 config_opts['plugin_conf']['ccache_enable'] = False
+config_opts['dnf_common_opts'] = ['--setoptinstall_weak_deps=1']