Updated October 3, 2024 Updated with help from @poz and others who have reached out with suggestions. I’ve now been using Nix, the package manager, fulltime on my personal machines since 2021. I run NixOS on my personal desktop/laptop and VMs, so I have some reasonable experience using it. I really enjoy using Nix, and think it’s a very useful tool, but it definitely needs a lot of tweaking. Today I want to share some of the config settings in Nix that most users probably want to change. The defaults that Nix uses for these settings don’t make that much sense to me, and most people who actually use Nix should probably consider changing them.