ocamlPackages.lwt-exit: small cleaning

pkgs/development/ocaml-modules/lwt-exit/default.nix

@@ -6,20 +6,16 @@
   ptime,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "lwt-exit";
   version = "1.0";
   src = fetchFromGitLab {
     owner = "nomadic-labs";
-    repo = pname;
-    rev = version;
-    sha256 = "1k763bmj1asj9ijar39rh3h1d59rckmsf21h2y8966lgglsf42bd";
+    repo = "lwt-exit";
+    tag = finalAttrs.version;
+    hash = "sha256-bQniNH2PGpOQFzAIp+tkOZUW4IA5jaxkTFKrIOsa5sw=";
   };
 
-  useDune2 = true;
-
-  minimalOCamlVersion = "4.08";
-
   propagatedBuildInputs = [
     lwt
     ptime
@@ -33,4 +29,4 @@ buildDunePackage rec {
     license = lib.licenses.mit;
     maintainers = [ lib.maintainers.ulrikstrid ];
   };
-}
+})