{pkgs, ...}: { programs.fish.enable = true; nixpkgs = { config = { allowUnfree = true; }; }; nix = { package = pkgs.nix; settings = { trusted-users = [ "@admin" ]; substituters = [ "https://nix-community.cachix.org" "https://cache.nixos.org" ]; trusted-public-keys = [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=" ]; }; gc = { automatic = true; options = "--delete-older-than 30d"; }; extraOptions = '' experimental-features = nix-command flakes ''; }; }