diff --git a/inventory/host_vars/osbs-master01.phx2.fedoraproject.org b/inventory/host_vars/osbs-master01.phx2.fedoraproject.org
index 647ae2d61d..023c32ebc2 100644
--- a/inventory/host_vars/osbs-master01.phx2.fedoraproject.org
+++ b/inventory/host_vars/osbs-master01.phx2.fedoraproject.org
@@ -16,3 +16,6 @@ lvm_size: 120g
 mem_size: 16384
 max_mem_size: 16384
 num_cpus: 4
+
+# this is to enable nested virt, which we need for some builds
+virt_install_command: "{{ virt_install_command_one_nic }} --cpu=host-passthrough,+vmx"