ocamlPackages.bheap: small cleaning

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

@@ -5,26 +5,24 @@
   stdlib-shims,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "bheap";
   version = "2.0.0";
 
   src = fetchurl {
-    url = "https://github.com/backtracking/${pname}/releases/download/${version}/${pname}-${version}.tbz";
-    sha256 = "0dpnpla20lgiicrxl2432m2fcr6y68msw3pnjxqb11xw6yrdfhsz";
+    url = "https://github.com/backtracking/bheap/releases/download/${finalAttrs.version}/bheap-${finalAttrs.version}.tbz";
+    hash = "sha256-X0PXsje8h7Bwl/YOrisy3mTmRBWDCNozi/FRIBS99jY=";
   };
 
-  useDune2 = true;
-
   doCheck = true;
   checkInputs = [
     stdlib-shims
   ];
 
-  meta = with lib; {
-    description = "OCaml binary heap implementation by Jean-Christophe Filliatre";
-    license = licenses.lgpl21Only;
-    maintainers = [ maintainers.sternenseemann ];
+  meta = {
+    description = "OCaml binary heap implementation by Jean-Christophe Filliâtre";
+    license = lib.licenses.lgpl21Only;
+    maintainers = [ lib.maintainers.sternenseemann ];
     homepage = "https://github.com/backtracking/bheap";
   };
-}
+})