What seems to be a workable config

modules/shared/default.nix

@@ -4,7 +4,7 @@ let
   emacsOverlaySha256 = "06413w510jmld20i4lik9b36cfafm501864yq8k4vxl5r4hn0j0h";
 in
 {
-
+  home-manager.backupFileExtension = "nix-backup";
   nixpkgs = {
     config = {
       allowUnfree = true;

modules/shared/home-manager.nix

@@ -1,8 +1,7 @@
 { config, pkgs, lib, ... }:
-
-let name = "%NAME%";
-    user = "%USER%";
-    email = "%EMAIL%"; in
+let name = "olaf";
+    user = "olaf";
+    email = "github@dacht.net"; in
 {
   # Shared shell configuration
   zsh = {
@@ -270,12 +269,14 @@ let name = "%NAME%";
       )
     ];
     matchBlocks = {
+      "Host *" = {
+        identityAgent="\"~/Library/Group Containers/2BUA8C4S2C.com.1password/t/agent.sock\"";
+      };
       "github.com" = {
         identitiesOnly = true;
         identityFile = [
           (lib.mkIf pkgs.stdenv.hostPlatform.isLinux
-            "/home/${user}/.ssh/id_github"
-          )
+            "/home/${user}/.ssh/id_github"          )
           (lib.mkIf pkgs.stdenv.hostPlatform.isDarwin
             "/Users/${user}/.ssh/id_github"
           )

modules/shared/packages.nix

@@ -2,7 +2,7 @@
 
 with pkgs; [
   # General packages for development and system management
-  alacritty
+  #alacritty
   aspell
   aspellDicts.en
   bash-completion
@@ -15,6 +15,9 @@ with pkgs; [
   sqlite
   wget
   zip
+  htop
+  ncdu
+  nixfmt-rfc-style
 
   # Encryption and security tools
   age
@@ -58,4 +61,7 @@ with pkgs; [
   # Python packages
   python3
   virtualenv
+
+  # Development 
+
 ]