diff --git a/release.nix b/release.nix
index e78bfc6..0fa443e 100644
--- a/release.nix
+++ b/release.nix
@@ -6,5 +6,6 @@
       import ./default.nix { system = { config = "x86_64-unknown-genode"; }; };
   in {
     nixpkgs = { inherit (pkgs.nixpkgs) stdenv; };
+    inherit (pkgs) upstream;
   };
 }