# All of the version control systems are here! { config, options, lib, pkgs, ... }: with lib; let cfg = config.modules.dev.vcs; in { options.modules.dev.vcs = { enable = mkOption { type = types.bool; default = false; }; }; config = mkIf cfg.enable { my.packages = with pkgs; [ gitAndTools.gitFull mercurial subversion ]; }; }