nixos

• list all installed packages

  nixos-option environment.systemPackages
  
  nix-env --query # user-installed pkgs

• disable GDM login (straight to tty), in configuration.nix

  services.xserver = {
  	displayManager = {
  		startx.enable = true;
  	};
  };

• enable zram, in hardware-configuration.nix

  zramSwap.enable;