diff --git a/pkgs/development/ocaml-modules/raylib/raygui.nix b/pkgs/development/ocaml-modules/raylib/raygui.nix
index 8f10576eae89..5f3748e16394 100644
--- a/pkgs/development/ocaml-modules/raylib/raygui.nix
+++ b/pkgs/development/ocaml-modules/raylib/raygui.nix
@@ -4,12 +4,12 @@
   raylib,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "raygui";
   version = "1.4.0";
 
   src = fetchurl {
-    url = "https://github.com/tjammer/raylib-ocaml/releases/download/${version}/raygui-${version}.tbz";
+    url = "https://github.com/tjammer/raylib-ocaml/releases/download/${finalAttrs.version}/raygui-${finalAttrs.version}.tbz";
     hash = "sha256-PQcVTAQKeTPkOOHk5w3O3Tz0n7jLvkIo3Urvrk66eMs=";
   };
 
@@ -22,4 +22,4 @@ buildDunePackage rec {
   meta = raylib.meta // {
     description = "OCaml bindings for raygui";
   };
-}
+})