Add darwin configuration into

modules/system/common/devenv.nix

@@ -0,0 +1,22 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+with lib;
+let
+  cfg = config.os.shell.devenv;
+in
+{
+  options.os.shell.devenv = {
+    enable = mkEnableOption "System devenv service";
+  };
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = with pkgs; [
+      devenv
+    ];
+
+  };
+}

modules/system/common/neovim.nix

@@ -0,0 +1,18 @@
+{ lib, config, ... }:
+with lib;
+let
+  cfg = config.os.shell.neovim;
+in
+{
+  options.os.shell.neovim = {
+    enable = mkEnableOption "System neovim service";
+  };
+  config = mkIf cfg.enable {
+
+    programs.neovim = {
+      enable = true;
+      defaultEditor = true;
+    };
+
+  };
+}

modules/system/common/nh.nix

@@ -0,0 +1,19 @@
+{ lib, config, ... }:
+with lib;
+let
+  cfg = config.os.shell.nh;
+in
+{
+  options.os.shell.nh = {
+    enable = mkEnableOption "System nh service";
+  };
+  config = mkIf cfg.enable {
+
+    programs.nh = {
+      enable = true;
+      clean.enable = true;
+      clean.extraArgs = "--keep-since 2d --keep 3";
+    };
+
+  };
+}