diff --git a/README.md b/README.md
index 32b2a22..94476a5 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@
 - Look into this for headscale https://carlosvaz.com/posts/setting-up-headscale-on-nixos/
 - Look into this for home assistant configuration https://nixos.wiki/wiki/Home_Assistant https://myme.no/posts/2021-11-25-nixos-home-assistant.html
 - This person seams to know what they are doing with home manager https://github.com/arvigeus/nixos-config/
+- https://nixos-and-flakes.thiscute.world/
 
 ## Configuration
 set up git configuration for local development: `git config core.hooksPath .hooks`
diff --git a/flake.nix b/flake.nix
index efffbd2..aaf2266 100644
--- a/flake.nix
+++ b/flake.nix
@@ -47,7 +47,6 @@
   };
 
   outputs = {
-    self,
     nixpkgs,
     disko,
     nixos-hardware,
@@ -60,22 +59,28 @@
       home-manager.backupFileExtension = "backup";
       home-manager.extraSpecialArgs = {inherit inputs;};
     };
-    forEachSystem = nixpkgs.lib.genAttrs [
+    systems = [
       "aarch64-darwin"
       "aarch64-linux"
       "x86_64-darwin"
       "x86_64-linux"
     ];
+    forEachSystem = nixpkgs.lib.genAttrs systems;
     forEachPkgs = lambda: forEachSystem (system: lambda nixpkgs.legacyPackages.${system});
 
     callPackage = nixpkgs.lib.callPackageWith (nixpkgs // {lib = lib;});
     lib = callPackage ./util {} // nixpkgs.lib;
   in {
+    packages = forEachPkgs (import ./pkgs);
+
+    formatter = forEachPkgs (system: system.alejandra);
+
     nixosConfigurations = {
       # Leyla Laptop
       horizon = nixpkgs.lib.nixosSystem {
         specialArgs = {inherit inputs lib;};
         modules = [
+          ./overlays
           home-manager.nixosModules.home-manager
           home-manager-config
           ./hosts/horizon/configuration.nix
@@ -86,6 +91,7 @@
       twilight = nixpkgs.lib.nixosSystem {
         specialArgs = {inherit inputs lib;};
         modules = [
+          ./overlays
           home-manager.nixosModules.home-manager
           home-manager-config
           ./hosts/twilight/configuration.nix
@@ -95,6 +101,7 @@
       defiant = nixpkgs.lib.nixosSystem {
         specialArgs = {inherit inputs lib;};
         modules = [
+          ./overlays
           disko.nixosModules.disko
           home-manager.nixosModules.home-manager
           home-manager-config
diff --git a/overlays/default.nix b/overlays/default.nix
new file mode 100644
index 0000000..4957ab8
--- /dev/null
+++ b/overlays/default.nix
@@ -0,0 +1,7 @@
+{...}: {
+  nixpkgs.overlays = [
+    (
+      self: super: import ../pkgs {pkgs = super;}
+    )
+  ];
+}
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 87a13d7..b02ba6c 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,2 +1,3 @@
-_: {
+{...}: {
+  # package = pkgs.callPackage ./package.nix {};
 }
diff --git a/users/leyla/default.nix b/users/leyla/default.nix
index 2698b8e..2c1f87b 100644
--- a/users/leyla/default.nix
+++ b/users/leyla/default.nix
@@ -27,7 +27,7 @@ in {
       then {
         isNormalUser = true;
         extraGroups = (
-          ["networkmanager" "wheel"]
+          ["networkmanager" "wheel" "dialout"]
           ++ lib.lists.optional (!cfg.isTerminalUser) "adbusers"
         );
 
diff --git a/users/leyla/packages.nix b/users/leyla/packages.nix
index 1406f6d..8aa3a72 100644
--- a/users/leyla/packages.nix
+++ b/users/leyla/packages.nix
@@ -61,6 +61,8 @@ in {
               dbeaver-bin
               bruno
               qFlipper
+              proxmark3
+              mfoc
 
               # system tools
               protonvpn-gui