{ catppuccin-bat, ...}: {
  # a cat(1) clone with syntax highlighting and Git integration.
  programs.bat = {
    enable = true;
    config = {
      pager = "less -FR";
      theme = "Catppuccin-mocha";
    };
    themes = {
      # https://raw.githubusercontent.com/catppuccin/bat/main/Catppuccin-mocha.tmTheme
      Catppuccin-mocha = builtins.readFile "${catppuccin-bat}/Catppuccin-mocha.tmTheme";
    };
  };
}