Incredably long boot time (2 mins+) for my brother sharing same configuration as me

I manage multiple systems with a single NixOS configuration, me and my brother’s laptops being two of them. However, my brother has had 2 mins+ boot times for the entire time since he’s switched to Linux afaik (the better part of a year ago), when he previously used Bazzite. Now however, he still has this issue even when sharing a configuration with me, with his being basically a pretty barebones system that he can use flatpaks and other stuff imperatively. It’s worth noting that he has an Nvid...