nixos-config/nixpkgs/variables.nix

{ config, pkgs, lib, ... }:
with lib; {
config ={
  home.sessionVariables = {
    LESS = "--quit-if-one-screen --RAW-CONTROL-CHARS";
    EDITOR = "vim";
    TERMINAL = "xfce4-terminal";
    BROWSER = "firefox";
    PRIVATE_BROWSER = "firefox -private";
  };
};
}