{ config, lib, pkgs, ... }: let feature = "dev"; in { config = lib.mkIf config.${feature}.enable { environment.systemPackages = ( with pkgs; ( [ # general devenv just mask vscode # rust bacon cargo-info rusty-man ] ++ (with jetbrains; [ rider webstorm ]) ) ); }; options.${feature}.enable = lib.mkEnableOption "enables ${feature}"; }