System-Level macOS Configuration with nix-darwin

Lets expand on our flake from before and also make system level changes like KeyInputDelay : This is the new flake.nix : flake.nix { description = " Home Manager configuration of gunwant.jain1 " ; inputs = { nixpkgs . url = " github:nixos/nixpkgs/nixos-unstable " ; darwin = { url = " github:lnl7/nix-darwin/master " ; inputs . nixpkgs . follows = " nixpkgs " ; } ; home-manager = { url = "…