add overlay for nix unstable

configuration.nix

@@ -9,6 +9,7 @@
     [
       ./hardware-configuration.nix
       ./home/manager.nix
+      ./system
     ];
 
   boot.loader.systemd-boot.enable = true;
@@ -64,9 +65,7 @@
   programs.firefox.enable = true;
   nixpkgs.config.allowUnfree = true;
 
-  environment.systemPackages =
+  environment.systemPackages = with pkgs; [
-
-  (with pkgs; [
     telegram-desktop
     (discord.override {
       withOpenASAR = true;
@@ -74,7 +73,7 @@
     helix
     nixd
     nodejs
-  ]);
+  ];
 
   nix.settings.experimental-features = [
     "nix-command"

home/aditya.nix

@@ -1,10 +1,14 @@
-{...}:
+{ pkgs, ... }:
 
 {
   home.username = "aditya";
   home.homeDirectory = "/home/aditya";
   home.stateVersion = "25.11";
 
+  home.packages = with pkgs.unstable; [
+    pear-desktop
+  ];
+
   imports = [
     ./programs/gh.nix
     ./programs/git.nix

system/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+  imports = [
+    ./overlays.nix
+  ];
+}

system/overlays.nix

@@ -11,7 +11,7 @@
         };
       in
       {
-        inherit (unstable-pkgs) ollama kdePackages sddm;
+        inherit (unstable-pkgs) pear-desktop;
         unstable = unstable-pkgs;
       }
     )