ocamlPackages.middleware: migrate to finalAttrs

pkgs/development/ocaml-modules/middleware/default.nix

@@ -5,14 +5,14 @@
   alcotest,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "middleware";
   version = "0.0.1";
 
   minimalOCamlVersion = "4.14.0";
 
   src = fetchurl {
-    url = "https://github.com/skolemlabs/middleware/releases/download/${version}/${pname}-${version}.tbz";
+    url = "https://github.com/skolemlabs/middleware/releases/download/${finalAttrs.version}/middleware-${finalAttrs.version}.tbz";
     hash = "sha256-zhLEGvyZiKrdBKWcEbB4PHvYzBlkrp1Ldnon0mP2Ypg=";
   };
 
@@ -25,8 +25,8 @@ buildDunePackage rec {
   meta = {
     description = "Composable stacked functions, which can respond to inner calls";
     homepage = "https://github.com/skolemlabs/middleware";
-    changelog = "https://github.com/skolemlabs/middleware/blob/${version}/CHANGES.md";
+    changelog = "https://github.com/skolemlabs/middleware/blob/${finalAttrs.version}/CHANGES.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ sixstring982 ];
   };
-}
+})