A note here since I did not know this: It looks like Redream is no longer open source. As far as I can tell its not formally acknowledged anywhere. It seems like it was silently closed source when it moved from GitHub to GitLab some time ago. I feel like people ought to know since some folks may be under the impression it is open source when it's not. I usually don't bother trying to use closed source emulators personally, for practical reasons (At the very least, closed source anything is a pain in the ass under NixOS.)