diff --git a/pkgs/development/ocaml-modules/ke/default.nix b/pkgs/development/ocaml-modules/ke/default.nix
index 14b984f4b811..21a8536afd51 100644
--- a/pkgs/development/ocaml-modules/ke/default.nix
+++ b/pkgs/development/ocaml-modules/ke/default.nix
@@ -7,12 +7,12 @@
   bigstringaf,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "ke";
   version = "0.6";
 
   src = fetchurl {
-    url = "https://github.com/mirage/ke/releases/download/v${version}/ke-${version}.tbz";
+    url = "https://github.com/mirage/ke/releases/download/v${finalAttrs.version}/ke-${finalAttrs.version}.tbz";
     sha256 = "sha256-YSFyB+IgCwSxd1lzZhD/kggmmmR/hUy1rnLNrA1nIwU=";
   };
 
@@ -33,4 +33,4 @@ buildDunePackage rec {
     license = lib.licenses.mit;
     maintainers = [ lib.maintainers.vbgl ];
   };
-}
+})