nixos-combined-flake/modules/home-manager/shell/bat/default.nix

{ config, lib, pkgs, ... }: lib.mkIf config.programs.bat.enable {
  home = {
    packages = with pkgs; [
      bat
    ];
    sessionVariables = {
      MANPAGER = "sh -c 'col -bx | bat -l man -p'";
      MANROFFOPT = "-c";
    };
    shellAliases = {
      cat = "bat";
    };
  };
}