Maybe this

modules/packages.nix

@@ -1,14 +1,11 @@
 { config, pkgs, ... }:
 
-let
-  settings = import ../settings.nix;
-in
 {
   # Enable unfree globally
   nixpkgs.config.allowUnfree = true;
 
   environment.variables.BROWSER = "librewolf";
-  environment.variables.SSH_AUTH_SOCK = "/home/${settings.username}/.bitwarden-ssh-agent.sock";
+  environment.variables.SSH_AUTH_SOCK = "/home/user/.bitwarden-ssh-agent.sock";
 
   environment.systemPackages =
     with pkgs; [
@@ -71,9 +68,9 @@ in
     enable = true;
     config = {
       user = {
-        name = "${settings.gitName}";
-        email = "${settings.gitEmail}";
-        signingkey = "${settings.gitKey}";
+        name = "User Name";
+        email = "user@email.com";
+        signingkey = "ssh-ed25519 ...";
       };
       gpg.format = "ssh";
       commit.gpgsign = true;