ECMP for BGP multihop vs. direct

Hi, we have 3 BGP upstreams a) direct b) multihop c) multihop a) always wins against b) and c) even if the AS path length is equal in all 3 cases. What is the recommended way to tell BIRD 3.3.x that it should consider them as if they were all direct and ignore the fact that some are multihop? goal: ECMP routes get installed for all 3 upstreams when their properties match. best regards, Christoph