 So I use a operating system called Nix. It's called NixOS. It's built around the fact of immutable package management. So what I'm saying is that every package on my computer has a unique hash. And that hash is a hash consisting of all the inputs that it gets, all the build commands that it gets, and all the dependencies, and it builds one package. For example, this terminal itself is a package which, I mean, my entire desktop is a formula. You can think of it as an immutable data structure on my disk. So if you actually look at my 3 minus a slash user, there's nothing in my slash user. So this is the mutable part of all Linux machines, at least. So this is actually pointing to a similar Nix to the hash that now has four details bin and something. So I'll just show you how I manage my dot files. So I use something called HoneManager, which is based on Nix. So what I do is I have my dot files in Git. So let's say I want to change my VMRC for some weird reason. Let's say I want to change my JMM color scheme. Yeah, that's the best to change. So OK, I want to remove this. I've decided I don't want to color this color scheme. So what I can do is I can kind of commentate it out. I just say HoneManager. OK, so I'll just run Vim right now to show you how it actually looks. So this is the, oops, I think color scheme is pretty bad here. OK, fine. That's OK. We'll see what happens. So this is the existing Vim. I just do a HoneManager switch. So it's kind of like warnings. So it's building all these things. So it's actually building the first one, which is VMRC, and it has a dependency, blah, blah, blah, blah. It defines my entire home directory and all these things. Now, let's say I start Vim, it looks the same. But I think it's because my background is transparent. So it doesn't actually make sense. Oh, this has changed. Yeah, this has changed. Yeah, OK. So this is how I manage. So let's say I screwed up on my configuration. So HoneManager, actually, I told you it's immutable copies. I can ask for generations. And this is like, oops, sorry, my generation right now is 31. And it's all immutable copies, all of these things, right? This first part of the thing after the thing. So I'm sure all of you are hearing about these things about immutability in code and all these things. But I mean, Nix just takes it to the next level and actually gets you package manager. That's just what I wanted to share.