diff --git a/hosts/nixos/harmonica-sd/hardware-configuration.nix b/hosts/nixos/harmonica-sd/hardware-configuration.nix
index faa2820..cc3ed25 100644
--- a/hosts/nixos/harmonica-sd/hardware-configuration.nix
+++ b/hosts/nixos/harmonica-sd/hardware-configuration.nix
@@ -6,7 +6,7 @@
 {
   # Some packages (ahci fail... this bypasses that) https://discourse.nixos.org/t/does-pkgs-linuxpackages-rpi3-build-all-required-kernel-modules/42509
   nixpkgs.overlays = [
-    (final: super: {
+    (_final: super: {
       makeModulesClosure = x: super.makeModulesClosure (x // { allowMissing = true; });
     })
   ];
diff --git a/hosts/nixos/harmonica/hardware-configuration.nix b/hosts/nixos/harmonica/hardware-configuration.nix
index 3d492ca..e1489ad 100644
--- a/hosts/nixos/harmonica/hardware-configuration.nix
+++ b/hosts/nixos/harmonica/hardware-configuration.nix
@@ -6,7 +6,7 @@
 {
   # Some packages (ahci fail... this bypasses that) https://discourse.nixos.org/t/does-pkgs-linuxpackages-rpi3-build-all-required-kernel-modules/42509
   nixpkgs.overlays = [
-    (final: super: {
+    (_final: super: {
       makeModulesClosure = x: super.makeModulesClosure (x // { allowMissing = true; });
     })
   ];
diff --git a/modules/nixos/system/home-manager.nix b/modules/nixos/system/home-manager.nix
index 3f881cd..9eda20c 100644
--- a/modules/nixos/system/home-manager.nix
+++ b/modules/nixos/system/home-manager.nix
@@ -35,7 +35,7 @@
             # Capture the NixOS system config before entering the home-manager scope
             systemConfig = config;
           in
-          lib.genAttrs (builtins.filter (u: u != "root") config.osbmModules.users) (username: {
+          lib.genAttrs (builtins.filter (u: u != "root") config.osbmModules.users) (_username: {
             # Use the system's stateVersion for home-manager
             home.stateVersion = lib.mkDefault systemConfig.system.stateVersion;
             imports = [
diff --git a/modules/nixos/system/impermanence.nix b/modules/nixos/system/impermanence.nix
index e8ec8fb..c97f947 100644
--- a/modules/nixos/system/impermanence.nix
+++ b/modules/nixos/system/impermanence.nix
@@ -10,7 +10,7 @@ let
   regularUsers = builtins.filter (u: u != "root") config.osbmModules.users;
 
   # Generate user persistence configuration
-  userPersistence = lib.genAttrs regularUsers (username: {
+  userPersistence = lib.genAttrs regularUsers (_username: {
     directories = [
       "Documents"
       {