diff --git a/pkgs/development/ocaml-modules/happy-eyeballs/default.nix b/pkgs/development/ocaml-modules/happy-eyeballs/default.nix
index 43df0a1cec74..e0686ed37fe3 100644
--- a/pkgs/development/ocaml-modules/happy-eyeballs/default.nix
+++ b/pkgs/development/ocaml-modules/happy-eyeballs/default.nix
@@ -9,14 +9,14 @@
   logs,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "happy-eyeballs";
   version = "2.0.1";
 
   minimalOCamlVersion = "4.08";
 
   src = fetchurl {
-    url = "https://github.com/roburio/happy-eyeballs/releases/download/v${version}/happy-eyeballs-${version}.tbz";
+    url = "https://github.com/roburio/happy-eyeballs/releases/download/v${finalAttrs.version}/happy-eyeballs-${finalAttrs.version}.tbz";
     hash = "sha256-slVFiDApMbqF4Yhh5hCjraeCNJbU1JoZXpU1VsNR0mk=";
   };
 
@@ -37,4 +37,4 @@ buildDunePackage rec {
       ulrikstrid
     ];
   };
-}
+})