refactor: pass pkgs-unstable as argument in forAllSystems

packages/devkit/default.nix

@@ -1,9 +1,8 @@
 {
   pkgs,
+  pkgs-unstable,
   inputs,
-}: let
-  unstable = import inputs.nixpkgs-unstable {inherit (pkgs) system;};
-in rec {
+}: rec {
   ghostty = pkgs.callPackage ./ghostty {};
   git = pkgs.callPackage ./git {};
   lazygit = pkgs.callPackage ./lazygit {};
@@ -13,7 +12,7 @@ in rec {
   # CURRENTLY BORKED https://github.com/zellij-org/zellij/issues/3970
   zellij = pkgs.callPackage ./zellij {
     shell = zsh;
-    zellij = unstable.zellij;
+    zellij = pkgs-unstable.zellij;
   };
   zsh = pkgs.callPackage ./zsh {};
 }