diff --git a/default.nix b/default.nix
index 296a0ff..a78dcff 100644
--- a/default.nix
+++ b/default.nix
@@ -1,5 +1,5 @@
-{pkgs ? import <nixpkgs> {}}: let
-  # my fork
-  gradle2nix = import (fetchTarball "https://github.com/rgoulter/gradle2nix/archive/v2--always-set-gradle-user-home.tar.gz") {};
-in
-  pkgs.callPackage ./c-worksheet-instrumentor.nix {inherit (gradle2nix) buildGradlePackage;}
+{
+  pkgs ? import <nixpkgs> {},
+  gradle2nix ? import (fetchTarball "https://github.com/rgoulter/gradle2nix/archive/v2--always-set-gradle-user-home.tar.gz") {},
+}:
+pkgs.callPackage ./c-worksheet-instrumentor.nix {inherit (gradle2nix) buildGradlePackage;}