adding flake

flake.nix

@@ -0,0 +1,51 @@
+# flake.nix — place this in the root of your nixos-config repo
+{
+  description = "FredOS NixOS configuration";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";  # shares your nixpkgs, no double download
+    };
+
+    omnisearch = {
+      url = "git+https://git.bwaaa.monster/omnisearch/omnisearch";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    zen-browser = {
+      url = "github:youwen5/zen-browser-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nix-flatpak = {
+      url = "github:gmodena/nix-flatpak";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, home-manager, omnisearch, zen-browser, nix-flatpak, ... } @ inputs:
+  let
+    system = "x86_64-linux";
+
+    # Helper so each host doesn't have to repeat the boilerplate
+    mkHost = hostname: nixpkgs.lib.nixosSystem {
+      inherit system;
+      specialArgs = { inherit inputs; };  # makes 'inputs' available in all your .nix files
+      modules = [
+        ./hosts/${hostname}.nix          # your existing per-host file
+        ./common.nix                     # your existing shared config
+        home-manager.nixosModules.homeManager
+        nix-flatpak.nixosModules.nix-flatpak
+      ];
+    };
+  in {
+    nixosConfigurations = {
+      FredOS-Gaming       = mkHost "FredOS-Gaming";
+      FredOS-Mediaserver  = mkHost "FredOS-Mediaserver";
+      FredOS-Macbook      = mkHost "FredOS-Macbook";
+    };
+  };
+}