fix(nix): nixpkgs input url should be unstable

flake.nix

@@ -2,12 +2,11 @@
   description = "A Bar/Panel for Hyprland with extensive customizability.";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     ags.url = "github:Aylur/ags";
   };
 
-  outputs = inputs:
-    let
+  outputs = inputs: let
     systems = [
       "x86_64-linux"
       "x86_64-darwin"
@@ -23,8 +22,7 @@
         }
     );
 
-      devShellFor =
-        system:
+    devShellFor = system:
       inputs.nixpkgs.lib.genAttrs ["default"] (
         _:
           inputs.nixpkgs.legacyPackages.${system}.mkShell {
@@ -60,8 +58,7 @@
             '';
           }
       );
-    in
-    {
+  in {
     devShells = forEachSystem devShellFor;
 
     overlay = final: prev: {
@@ -71,14 +68,11 @@
         else inputs.self.packages.${prev.stdenv.system}.default;
     };
     packages = forEachSystem (
-        system:
-        let
+      system: let
         pkgs = pkgsFor.${system};
-        in
-        {
+      in {
         default = (pkgs.callPackage ./nix {inherit inputs;}).desktop.script;
       }
     );
   };
 }
-