Update '.nix/release.nix'

.nix/release.nix

@@ -1,9 +1,17 @@
-{ ... }:
+{ nixpkgs ? <nixpkgs>
+, forstio ? {outPath = ../forstio;}
+}:
 let
-  pkgs = (import <nixpkgs>{});
+  pkgs = import nixpkgs{};
+  forstioJobSet = import "${forstio}/.nix/release.nix" {
+    inherit nixpkgs forstio;
+  };
+  forstio = builtins.getAttr (builtins.currentSystem) (forstioJobset);
 in
 {
   keldu = {
-    forstio-window = pkgs.callPackage ./derivation.nix {};
+    forstio-window = pkgs.callPackage ./derivation.nix {
+      inherit forstio;      
+    };
   };
 }