diff --git a/pkgs/development/ocaml-modules/graphql/lwt.nix b/pkgs/development/ocaml-modules/graphql/lwt.nix
index 57df8a3f5232..cc458db986fa 100644
--- a/pkgs/development/ocaml-modules/graphql/lwt.nix
+++ b/pkgs/development/ocaml-modules/graphql/lwt.nix
@@ -2,7 +2,7 @@
   buildDunePackage,
   alcotest,
   graphql,
-  ocaml_lwt,
+  lwt,
 }:
 
 buildDunePackage {
@@ -10,11 +10,9 @@ buildDunePackage {
 
   inherit (graphql) version src;
 
-  duneVersion = "3";
-
   propagatedBuildInputs = [
     graphql
-    ocaml_lwt
+    lwt
   ];
 
   checkInputs = [ alcotest ];
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index f109780364a2..93523d746c51 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1394,8 +1394,6 @@ let
 
         ocaml-lua = callPackage ../development/ocaml-modules/ocaml-lua { };
 
-        ocaml_lwt = lwt;
-
         ocaml-migrate-parsetree = ocaml-migrate-parsetree-1-8;
 
         ocaml-migrate-parsetree-1-8 =
@@ -2251,6 +2249,7 @@ let
         chacha = throw "chacha has been removed because it has been marked as broken since at least November 2024. It is now vendored inside mirage-crypto, consider using that instead."; # Added 2025-10-11
         gd4o = throw "ocamlPackages.gd4o is not maintained, use ocamlPackages.gd instead";
         ocaml-vdom = throw "2023-10-09: ocamlPackages.ocaml-vdom was renamed to ocamlPackages.vdom";
+        ocaml_lwt = throw "ocamlPackages.ocaml_lwt has been renamed to ocamlPackages.lwt"; # Added 2025-12-05
       }
     )).overrideScope
       liftJaneStreet;