Transitioning from swaddle

My son sleeps in a Velcro swaddle - it has done wonders for him. However he is starting to roll over from back to tummy during the day. We have tried him in a sleep sack a few times but the issue he has is that he has the most delicious and most interesting hands in the world. He is so distracted by those amazing hands that he won’t sleep. He tries to escape the swaddle just so he can be reunited with them. I think we still have a bit of time before he will be able to roll in the swaddle so I’d like to figure out how to transition him to a sleep sack without having him so distracted by those delicious hands. Thanks!