diff --git a/pkgs/development/ocaml-modules/iomux/default.nix b/pkgs/development/ocaml-modules/iomux/default.nix
index 25b7c07ddad8..6f4535e3ec7f 100644
--- a/pkgs/development/ocaml-modules/iomux/default.nix
+++ b/pkgs/development/ocaml-modules/iomux/default.nix
@@ -6,14 +6,14 @@
   alcotest,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "iomux";
   version = "0.4";
 
   minimalOCamlVersion = "4.08";
 
   src = fetchurl {
-    url = "https://github.com/haesbaert/ocaml-${pname}/releases/download/v${version}/${pname}-${version}.tbz";
+    url = "https://github.com/haesbaert/ocaml-iomux/releases/download/v${finalAttrs.version}/iomux-${finalAttrs.version}.tbz";
     hash = "sha256-Hjk/rlWUdoSMXHBSUHaxEHDoBqVJ7rrghLBGqXcrqzU=";
   };
 
@@ -26,9 +26,9 @@ buildDunePackage rec {
   ];
 
   meta = {
-    homepage = "https://github.com/haesbaert/ocaml-${pname}";
+    homepage = "https://github.com/haesbaert/ocaml-iomux";
     description = "IO Multiplexers for OCaml";
     license = with lib.licenses; [ isc ];
     maintainers = with lib.maintainers; [ toastal ];
   };
-}
+})