Add support for nixos-unstable packages

flake.nix

@@ -3,6 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
 
     home-manager = {
       url = "github:nix-community/home-manager/release-25.11";
@@ -28,6 +29,7 @@
   outputs =
     {
       nixpkgs,
+      nixpkgs-unstable,
       home-manager,
       sops-nix,
       disko,
@@ -36,7 +38,21 @@
     {
       nixosConfigurations = {
         plexy = nixpkgs.lib.nixosSystem {
-          system = "x86_64-linux";
+          specialArgs =
+            let
+              system = "x86_64-linux";
+            in
+            {
+              pkgs = import nixpkgs {
+                inherit system;
+                config.allowUnfree = true;
+              };
+              pkgs-unstable = import nixpkgs-unstable {
+                inherit system;
+                config.allowUnfree = true;
+              };
+            };
+
           modules = [
             ./hosts/plexy
             home-manager.nixosModules.home-manager

hosts/plexy/default.nix

@@ -1,6 +1,7 @@
 {
   config,
   pkgs,
+  pkgs-unstable,
   ...
 }: