Could I add both "kadira:flow-router" and "meteorhacks:flow-router"?

Could I add both kadira:flow-router and meteorhacks:flow-router?
Because I has any package use meteorhacks:flow-router such as: arillo:flow-router-helpers, zimme:active-route

Nope, they cause strange problems.

Either don’t upgrade to kadir:flow-router yet or disable the helper packages.

Those two packages have active issues on githup tracking this and they will soon release new versions.

Thanks for your reply.