diff --git a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
deleted file mode 100644
index d82b9d1fb8..0000000000
--- a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
+++ /dev/null
@@ -1,24 +0,0 @@
---- a/toplevel/lib/jsooTop.ml
-+++ b/toplevel/lib/jsooTop.ml
-@@ -65,6 +65,7 @@
-     p := !p + len'';
-     len''
-
-+[%%if ocaml_version < (4, 14, 0)]
- let use ffp content =
-   let fname, oc =
-     Filename.open_temp_file ~mode:[ Open_binary ] "jsoo_toplevel" "fake_stdin"
-@@ -78,10 +79,11 @@
-   with e ->
-     Sys.remove fname;
-     raise e
--[@@if ocaml_version < (4, 14, 0)]
-+[%%endif]
-
-+[%%if ocaml_version >= (4, 14, 0)]
- let use ffp content = Toploop.use_silently ffp (String content)
--[@@if ocaml_version >= (4, 14, 0)]
-+[%%endif]
-
- let execute printval ?pp_code ?highlight_location pp_answer s =
-   let lb = Lexing.from_function (refill_lexbuf s (ref 0) pp_code) in
diff --git a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-top-effects.patch b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-top-effects.patch
new file mode 100644
index 0000000000..d2f36b6d7b
--- /dev/null
+++ b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-top-effects.patch
@@ -0,0 +1,16 @@
+diff --git a/runtime/js/jslib.js b/runtime/js/jslib.js
+index 6a711bbb1d..081361a841 100644
+--- a/runtime/js/jslib.js
++++ b/runtime/js/jslib.js
+@@ -134,8 +134,9 @@ function caml_jsoo_flags_use_js_string(unit) {
+ }
+ 
+ //Provides: caml_jsoo_flags_effects
++//Requires: caml_string_of_jsstring
+ function caml_jsoo_flags_effects(unit) {
+-  return CONFIG("effects");
++  return caml_string_of_jsstring(CONFIG("effects"));
+ }
+ 
+ //Provides: caml_wrap_exception const (mutable)
+
diff --git a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-toplevel.patch b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-toplevel.patch
new file mode 100644
index 0000000000..c291dee46c
--- /dev/null
+++ b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/js_of_ocaml-toplevel.patch
@@ -0,0 +1,208 @@
+diff --git a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+index 140a53b..d857289 100644
+--- a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
++++ b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+@@ -4,7 +4,7 @@ module J = Jsoo_runtime.Js
+
+ type bytecode_sections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+diff --git a/compiler/lib/link_js.ml b/compiler/lib/link_js.ml
+index 68f0c32..3ec9ddc 100644
+--- a/compiler/lib/link_js.ml
++++ b/compiler/lib/link_js.ml
+@@ -426,7 +426,7 @@ let link ~output ~linkall ~mklib ~toplevel ~files ~resolve_sourcemap_url ~(sourc
+             List.fold_left units ~init:StringSet.empty ~f:(fun acc (u : Unit_info.t) ->
+                 StringSet.union acc (StringSet.of_list u.primitives))
+           in
+-          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[] in
++          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[||] in
+           let b = Buffer.create 100 in
+           let fmt = Pretty_print.to_buffer b in
+           Driver.configure fmt;
+diff --git a/compiler/lib/parse_bytecode.ml b/compiler/lib/parse_bytecode.ml
+index 79e0c8f..bf8751a 100644
+--- a/compiler/lib/parse_bytecode.ml
++++ b/compiler/lib/parse_bytecode.ml
+@@ -35,6 +35,9 @@ let predefined_exceptions =
+
+ let new_closure_repr = Ocaml_version.compare Ocaml_version.current [ 4; 12 ] >= 0
+
++let crc_name v = Import_info.name v |> Compilation_unit.Name.to_string
++let crc_crc v = Import_info.crc v
++
+ (* Read and manipulate debug section *)
+ module Debug : sig
+   type t
+@@ -76,11 +79,11 @@ module Debug : sig
+     -> unit
+
+   val read :
+-    t -> crcs:(string * string option) list -> includes:string list -> in_channel -> unit
++    t -> crcs:Import_info.t list -> includes:string list -> in_channel -> unit
+
+   val read_event_list :
+        t
+-    -> crcs:(string * string option) list
++    -> crcs:Import_info.t list
+     -> includes:string list
+     -> orig:int
+     -> in_channel
+@@ -146,6 +149,7 @@ end = struct
+     | Some _ as x -> x
+     | None -> Fs.find_in_path paths (name ^ ".ml")
+
++
+   let read_event
+       ~paths
+       ~crcs
+@@ -216,7 +220,7 @@ end = struct
+     fun debug ~crcs ~includes ~orig ic ->
+       let crcs =
+         let t = Hashtbl.create 17 in
+-        List.iter crcs ~f:(fun (m, crc) -> Hashtbl.add t m crc);
++        List.iter crcs ~f:(fun i -> Hashtbl.add t (crc_name i) (crc_crc i));
+         t
+       in
+       let evl : debug_event list = input_value ic in
+@@ -2520,7 +2524,7 @@ module Toc : sig
+
+   val read_data : t -> in_channel -> Obj.t array
+
+-  val read_crcs : t -> in_channel -> (string * Digest.t option) list
++  val read_crcs : t -> in_channel -> Import_info.t array
+
+   val read_prim : t -> in_channel -> string
+
+@@ -2570,9 +2574,10 @@ end = struct
+   let read_crcs toc ic =
+     ignore (seek_section toc ic "CRCS");
+     let orig_crcs : Import_info.t array = input_value ic in
+-    List.map (Array.to_list orig_crcs) ~f:(fun import ->
+-      Import_info.name import |> Compilation_unit.Name.to_string,
+-      Import_info.crc import)
++    orig_crcs
++    (* List.map (Array.to_list orig_crcs) ~f:(fun import -> *)
++    (*   Import_info.name import |> Compilation_unit.Name.to_string, *)
++    (*   Import_info.crc import) *)
+
+   let read_prim toc ic =
+     let prim_size = seek_section toc ic "PRIM" in
+@@ -2587,12 +2592,13 @@ let read_primitives toc ic =
+
+ type bytesections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+ [@@ocaml.warning "-unused-field"]
+
++
+ let from_exe
+     ?(includes = [])
+     ~linkall
+@@ -2625,7 +2631,7 @@ let from_exe
+       | Some l -> List.mem s ~set:l
+       | None -> true)
+   in
+-  let crcs = List.filter ~f:(fun (unit, _crc) -> keep unit) orig_crcs in
++  let crcs = List.filter ~f:(fun info -> keep (crc_name info)) (Array.to_list orig_crcs) in
+   let symbols =
+     Ocaml_compiler.Symtable.GlobalMap.filter
+       (function
+@@ -2690,7 +2696,7 @@ let from_exe
+         |> Array.of_list
+       in
+       (* Include linking information *)
+-      let sections = { symb = symbols; crcs; prim = primitives; dlpt = [] } in
++      let sections = { symb = symbols; crcs = Array.of_list crcs; prim = primitives; dlpt = [] } in
+       let gdata = Var.fresh () in
+       let need_gdata = ref false in
+       let infos =
+diff --git a/compiler/lib/parse_bytecode.mli b/compiler/lib/parse_bytecode.mli
+index 7bcc822..b34113b 100644
+--- a/compiler/lib/parse_bytecode.mli
++++ b/compiler/lib/parse_bytecode.mli
+@@ -91,5 +91,5 @@ val predefined_exceptions : unit -> Code.program * Unit_info.t
+ val link_info :
+      symbols:Ocaml_compiler.Symtable.GlobalMap.t
+   -> primitives:StringSet.t
+-  -> crcs:(string * Digest.t option) list
++  -> crcs:Import_info.t array
+   -> Code.program
+diff --git a/runtime/js/capsule.js b/runtime/js/capsule.js
+new file mode 100644
+index 0000000..0c02acc
+--- /dev/null
++++ b/runtime/js/capsule.js
+@@ -0,0 +1,14 @@
++//Provides: caml_capsule_mutex_new
++function caml_capsule_mutex_new () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_lock
++function caml_capsule_mutex_lock () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_unlock
++function caml_capsule_mutex_unlock () {
++  return 0;
++}
+diff --git a/runtime/js/dune b/runtime/js/dune
+index f31ffd1..7e76a14 100644
+--- a/runtime/js/dune
++++ b/runtime/js/dune
+@@ -4,6 +4,7 @@
+  (files
+   bigarray.js
+   bigstring.js
++  capsule.js
+   dynlink.js
+   fs.js
+   fs_fake.js
+diff --git a/runtime/js/float32.js b/runtime/js/float32.js
+index 0c60d3d..74bb433 100644
+--- a/runtime/js/float32.js
++++ b/runtime/js/float32.js
+@@ -12,6 +12,11 @@
+     by native programs and vice versa.
+ */
+
++//Provides: caml_is_boot_compiler
++function caml_is_boot_compiler(x) {
++  return 0;
++}
++
+ //Provides: caml_float_of_float32 const
+ function caml_float_of_float32(x) {
+     return x;
+diff --git a/runtime/js/toplevel.js b/runtime/js/toplevel.js
+index 2e4547e..adaffd3 100644
+--- a/runtime/js/toplevel.js
++++ b/runtime/js/toplevel.js
+@@ -94,7 +94,7 @@ function jsoo_toplevel_init_reloc(f) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_ba_to_typed_array
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: >= 5.2
++//Version: >= 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
+@@ -107,7 +107,7 @@ function caml_reify_bytecode(code, debug, _digest) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_uint8_array_of_bytes
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: < 5.2
++//Version: < 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
diff --git a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/wasm_of_ocaml-sourcemap-contents.patch b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/wasm_of_ocaml-sourcemap-contents.patch
new file mode 100644
index 0000000000..dccaf3e0c3
--- /dev/null
+++ b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/files/wasm_of_ocaml-sourcemap-contents.patch
@@ -0,0 +1,17 @@
+--- a/compiler/bin-wasm_of_ocaml/compile.ml
++++ b/compiler/bin-wasm_of_ocaml/compile.ml
+@@ -226,8 +226,14 @@
+   Option.iter sm ~f:(fun sm ->
+       if not sourcemap_don't_inline_content
+       then
++        let rewrite =
++          match Build_path_prefix_map.get_build_path_prefix_map () with
++          | Some map -> let map = Build_path_prefix_map.flip map in (fun path -> Build_path_prefix_map.rewrite map path)
++          | None -> Fun.id
++        in
+         Wasm_source_map.iter_sources sm (fun i j file ->
++            let file = rewrite file in
+             if Sys.file_exists file && not (Sys.is_directory file)
+             then
+               let sm = Fs.read_file file in
+               Zip.add_entry
diff --git a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/opam b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/opam
index cdb149c190..4668c125b9 100644
--- a/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/opam
+++ b/packages/js_of_ocaml-compiler/js_of_ocaml-compiler.6.0.1+ox/opam
@@ -53,7 +53,6 @@ patches: [
   "js_of_ocaml-add-unboxed-and-float-block.patch"
   "js_of_ocaml-ident-is_global.patch"
   "js_of_ocaml-remove-float-externals.patch"
-  "js_of_ocaml-ocaml_version-ppx.patch"
   "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
   "js_of_ocaml-fix-build_fs.patch"
   "js_of_ocaml-iarray-primitives.patch"
@@ -73,6 +72,7 @@ patches: [
   "js_of_ocaml-jane-street-5.2-compatibility.patch"
   "js_of_ocaml-migrate-labeled-tuples-shims.patch"
   "js_of_ocaml-floatarray_create_local.patch"
+  "wasm_of_ocaml-sourcemap-contents.patch"
   "js_of_ocaml-jane-street-const_null-support.patch"
   "js_of_ocaml-float32.patch"
   "js_of_ocaml-caml_array_append.patch"
@@ -84,6 +84,8 @@ patches: [
   "js_of_ocaml-obj_stubs.patch"
   "js_of_ocaml-float32-2.patch"
   "dune.patch"
+  "js_of_ocaml-top-effects.patch"
+  "js_of_ocaml-toplevel.patch"
 ]
 extra-files: [
   [
@@ -114,10 +116,6 @@ extra-files: [
     "js_of_ocaml-remove-float-externals.patch"
     "sha256=a3aa95ee08210377c1470e5bf0f832bc27ad98299bca22c7a88eb9fd6c32e655"
   ]
-  [
-    "js_of_ocaml-ocaml_version-ppx.patch"
-    "sha256=df6bcb6da8aa3dfd6bd0a178679987d41c400ec1803f4a66659cfc822d1b280f"
-  ]
   [
     "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
     "sha256=00d38ead67c67220351605d72c2b3a4e3faa8053087ef8ab47b7067b42900ba9"
@@ -194,6 +192,10 @@ extra-files: [
     "js_of_ocaml-floatarray_create_local.patch"
     "sha256=f17e392acc941dde475cb7be0654037df9b8d550aeae0d96b65394e4c4a1d4ca"
   ]
+  [
+    "wasm_of_ocaml-sourcemap-contents.patch"
+    "sha256=93b7dddf6313836ce02fbe762c40380e20daefdd8b87ec885ee0f4ef779ad76b"
+  ]
   [
     "js_of_ocaml-jane-street-const_null-support.patch"
     "sha256=e708cdc01c0cef3fce1cb9f31b33324977dcca1c166601905fcac1ef10262c3a"
@@ -238,4 +240,12 @@ extra-files: [
     "dune.patch"
     "sha256=f76da998ab76de56309bd0da3e4db1fb496d6d235d7a0ac2f78e3bafe098714e"
   ]
+  [
+   "js_of_ocaml-top-effects.patch"
+   "sha256=638247bd3f7bacb99612353b29c0afdcc48598c5771a52602a96baabbc141370"
+  ]
+  [
+   "js_of_ocaml-toplevel.patch"
+   "sha256=56c305aa9ed8cb35e9a3bee9fb17aaae244522bacb54a78115b03182a746b7b2"
+  ]
 ]
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
new file mode 100644
index 0000000000..abc1cf740b
--- /dev/null
+++ b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
@@ -0,0 +1,49 @@
+--- a/runtime/js/obj.js
++++ b/runtime/js/obj.js
+@@ -44,6 +44,22 @@
+   return +Array.isArray(x);
+ }
+
++//Provides: caml_obj_is_stack
++function caml_obj_is_stack(x) {
++  return 0;
++}
++
++//Provides: caml_succ_scannable_prefix_len
++function caml_succ_scannable_prefix_len(x) {
++  return 0;
++}
++
++//Provides: caml_obj_uniquely_reachable_words
++//Requires: caml_failwith
++function caml_obj_uniquely_reachable_words(x) {
++  caml_failwith("Obj.uniquely_reachable_words is not available in javascript.");
++}
++
+ //Provides: caml_obj_tag
+ //Requires: caml_is_ml_bytes, caml_is_ml_string
+ function caml_obj_tag(x) {
+--- a/runtime/wasm/obj.wat
++++ b/runtime/wasm/obj.wat
+@@ -101,6 +101,21 @@
+    (global $double_array_tag (export "double_array_tag") i32 (i32.const 254))
+    (global $custom_tag i32 (i32.const 255))
+
++   (func (export "caml_obj_is_stack")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (func (export "caml_succ_scannable_prefix_len")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (@string $unique_words_unsupported "Obj.uniquely_reachable_words is not available in wasm.")
++
++   (func (export "caml_obj_uniquely_reachable_words")
++      (param (ref eq)) (result (ref eq))
++      (call $caml_failwith (global.get $unique_words_unsupported))
++      (ref.i31 (i32.const 0)))
++
+    (func $caml_is_closure (export "caml_is_closure")
+       (param $v (ref eq)) (result i32)
+       (i32.or (ref.test (ref $closure) (local.get $v))
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
deleted file mode 100644
index d82b9d1fb8..0000000000
--- a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
+++ /dev/null
@@ -1,24 +0,0 @@
---- a/toplevel/lib/jsooTop.ml
-+++ b/toplevel/lib/jsooTop.ml
-@@ -65,6 +65,7 @@
-     p := !p + len'';
-     len''
-
-+[%%if ocaml_version < (4, 14, 0)]
- let use ffp content =
-   let fname, oc =
-     Filename.open_temp_file ~mode:[ Open_binary ] "jsoo_toplevel" "fake_stdin"
-@@ -78,10 +79,11 @@
-   with e ->
-     Sys.remove fname;
-     raise e
--[@@if ocaml_version < (4, 14, 0)]
-+[%%endif]
-
-+[%%if ocaml_version >= (4, 14, 0)]
- let use ffp content = Toploop.use_silently ffp (String content)
--[@@if ocaml_version >= (4, 14, 0)]
-+[%%endif]
-
- let execute printval ?pp_code ?highlight_location pp_answer s =
-   let lb = Lexing.from_function (refill_lexbuf s (ref 0) pp_code) in
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-top-effects.patch b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-top-effects.patch
new file mode 100644
index 0000000000..d2f36b6d7b
--- /dev/null
+++ b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-top-effects.patch
@@ -0,0 +1,16 @@
+diff --git a/runtime/js/jslib.js b/runtime/js/jslib.js
+index 6a711bbb1d..081361a841 100644
+--- a/runtime/js/jslib.js
++++ b/runtime/js/jslib.js
+@@ -134,8 +134,9 @@ function caml_jsoo_flags_use_js_string(unit) {
+ }
+ 
+ //Provides: caml_jsoo_flags_effects
++//Requires: caml_string_of_jsstring
+ function caml_jsoo_flags_effects(unit) {
+-  return CONFIG("effects");
++  return caml_string_of_jsstring(CONFIG("effects"));
+ }
+ 
+ //Provides: caml_wrap_exception const (mutable)
+
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-toplevel.patch b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-toplevel.patch
new file mode 100644
index 0000000000..c291dee46c
--- /dev/null
+++ b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-toplevel.patch
@@ -0,0 +1,208 @@
+diff --git a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+index 140a53b..d857289 100644
+--- a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
++++ b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+@@ -4,7 +4,7 @@ module J = Jsoo_runtime.Js
+
+ type bytecode_sections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+diff --git a/compiler/lib/link_js.ml b/compiler/lib/link_js.ml
+index 68f0c32..3ec9ddc 100644
+--- a/compiler/lib/link_js.ml
++++ b/compiler/lib/link_js.ml
+@@ -426,7 +426,7 @@ let link ~output ~linkall ~mklib ~toplevel ~files ~resolve_sourcemap_url ~(sourc
+             List.fold_left units ~init:StringSet.empty ~f:(fun acc (u : Unit_info.t) ->
+                 StringSet.union acc (StringSet.of_list u.primitives))
+           in
+-          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[] in
++          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[||] in
+           let b = Buffer.create 100 in
+           let fmt = Pretty_print.to_buffer b in
+           Driver.configure fmt;
+diff --git a/compiler/lib/parse_bytecode.ml b/compiler/lib/parse_bytecode.ml
+index 79e0c8f..bf8751a 100644
+--- a/compiler/lib/parse_bytecode.ml
++++ b/compiler/lib/parse_bytecode.ml
+@@ -35,6 +35,9 @@ let predefined_exceptions =
+
+ let new_closure_repr = Ocaml_version.compare Ocaml_version.current [ 4; 12 ] >= 0
+
++let crc_name v = Import_info.name v |> Compilation_unit.Name.to_string
++let crc_crc v = Import_info.crc v
++
+ (* Read and manipulate debug section *)
+ module Debug : sig
+   type t
+@@ -76,11 +79,11 @@ module Debug : sig
+     -> unit
+
+   val read :
+-    t -> crcs:(string * string option) list -> includes:string list -> in_channel -> unit
++    t -> crcs:Import_info.t list -> includes:string list -> in_channel -> unit
+
+   val read_event_list :
+        t
+-    -> crcs:(string * string option) list
++    -> crcs:Import_info.t list
+     -> includes:string list
+     -> orig:int
+     -> in_channel
+@@ -146,6 +149,7 @@ end = struct
+     | Some _ as x -> x
+     | None -> Fs.find_in_path paths (name ^ ".ml")
+
++
+   let read_event
+       ~paths
+       ~crcs
+@@ -216,7 +220,7 @@ end = struct
+     fun debug ~crcs ~includes ~orig ic ->
+       let crcs =
+         let t = Hashtbl.create 17 in
+-        List.iter crcs ~f:(fun (m, crc) -> Hashtbl.add t m crc);
++        List.iter crcs ~f:(fun i -> Hashtbl.add t (crc_name i) (crc_crc i));
+         t
+       in
+       let evl : debug_event list = input_value ic in
+@@ -2520,7 +2524,7 @@ module Toc : sig
+
+   val read_data : t -> in_channel -> Obj.t array
+
+-  val read_crcs : t -> in_channel -> (string * Digest.t option) list
++  val read_crcs : t -> in_channel -> Import_info.t array
+
+   val read_prim : t -> in_channel -> string
+
+@@ -2570,9 +2574,10 @@ end = struct
+   let read_crcs toc ic =
+     ignore (seek_section toc ic "CRCS");
+     let orig_crcs : Import_info.t array = input_value ic in
+-    List.map (Array.to_list orig_crcs) ~f:(fun import ->
+-      Import_info.name import |> Compilation_unit.Name.to_string,
+-      Import_info.crc import)
++    orig_crcs
++    (* List.map (Array.to_list orig_crcs) ~f:(fun import -> *)
++    (*   Import_info.name import |> Compilation_unit.Name.to_string, *)
++    (*   Import_info.crc import) *)
+
+   let read_prim toc ic =
+     let prim_size = seek_section toc ic "PRIM" in
+@@ -2587,12 +2592,13 @@ let read_primitives toc ic =
+
+ type bytesections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+ [@@ocaml.warning "-unused-field"]
+
++
+ let from_exe
+     ?(includes = [])
+     ~linkall
+@@ -2625,7 +2631,7 @@ let from_exe
+       | Some l -> List.mem s ~set:l
+       | None -> true)
+   in
+-  let crcs = List.filter ~f:(fun (unit, _crc) -> keep unit) orig_crcs in
++  let crcs = List.filter ~f:(fun info -> keep (crc_name info)) (Array.to_list orig_crcs) in
+   let symbols =
+     Ocaml_compiler.Symtable.GlobalMap.filter
+       (function
+@@ -2690,7 +2696,7 @@ let from_exe
+         |> Array.of_list
+       in
+       (* Include linking information *)
+-      let sections = { symb = symbols; crcs; prim = primitives; dlpt = [] } in
++      let sections = { symb = symbols; crcs = Array.of_list crcs; prim = primitives; dlpt = [] } in
+       let gdata = Var.fresh () in
+       let need_gdata = ref false in
+       let infos =
+diff --git a/compiler/lib/parse_bytecode.mli b/compiler/lib/parse_bytecode.mli
+index 7bcc822..b34113b 100644
+--- a/compiler/lib/parse_bytecode.mli
++++ b/compiler/lib/parse_bytecode.mli
+@@ -91,5 +91,5 @@ val predefined_exceptions : unit -> Code.program * Unit_info.t
+ val link_info :
+      symbols:Ocaml_compiler.Symtable.GlobalMap.t
+   -> primitives:StringSet.t
+-  -> crcs:(string * Digest.t option) list
++  -> crcs:Import_info.t array
+   -> Code.program
+diff --git a/runtime/js/capsule.js b/runtime/js/capsule.js
+new file mode 100644
+index 0000000..0c02acc
+--- /dev/null
++++ b/runtime/js/capsule.js
+@@ -0,0 +1,14 @@
++//Provides: caml_capsule_mutex_new
++function caml_capsule_mutex_new () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_lock
++function caml_capsule_mutex_lock () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_unlock
++function caml_capsule_mutex_unlock () {
++  return 0;
++}
+diff --git a/runtime/js/dune b/runtime/js/dune
+index f31ffd1..7e76a14 100644
+--- a/runtime/js/dune
++++ b/runtime/js/dune
+@@ -4,6 +4,7 @@
+  (files
+   bigarray.js
+   bigstring.js
++  capsule.js
+   dynlink.js
+   fs.js
+   fs_fake.js
+diff --git a/runtime/js/float32.js b/runtime/js/float32.js
+index 0c60d3d..74bb433 100644
+--- a/runtime/js/float32.js
++++ b/runtime/js/float32.js
+@@ -12,6 +12,11 @@
+     by native programs and vice versa.
+ */
+
++//Provides: caml_is_boot_compiler
++function caml_is_boot_compiler(x) {
++  return 0;
++}
++
+ //Provides: caml_float_of_float32 const
+ function caml_float_of_float32(x) {
+     return x;
+diff --git a/runtime/js/toplevel.js b/runtime/js/toplevel.js
+index 2e4547e..adaffd3 100644
+--- a/runtime/js/toplevel.js
++++ b/runtime/js/toplevel.js
+@@ -94,7 +94,7 @@ function jsoo_toplevel_init_reloc(f) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_ba_to_typed_array
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: >= 5.2
++//Version: >= 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
+@@ -107,7 +107,7 @@ function caml_reify_bytecode(code, debug, _digest) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_uint8_array_of_bytes
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: < 5.2
++//Version: < 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
new file mode 100644
index 0000000000..37cd43ed47
--- /dev/null
+++ b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
@@ -0,0 +1,10 @@
+--- a/runtime/js/stdlib.js
++++ b/runtime/js/stdlib.js
+@@ -302,7 +302,6 @@
+ }
+
+ //Provides: caml_process_pending_actions_with_root
+-//Version: >= 5.3
+ function caml_process_pending_actions_with_root(extra_root) {
+   return 0;
+ }
diff --git a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/opam b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/opam
index 8e329d3a70..2107f9509a 100644
--- a/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/opam
+++ b/packages/js_of_ocaml-ppx/js_of_ocaml-ppx.6.0.1+ox/opam
@@ -42,7 +42,6 @@ patches: [
   "js_of_ocaml-add-unboxed-and-float-block.patch"
   "js_of_ocaml-ident-is_global.patch"
   "js_of_ocaml-remove-float-externals.patch"
-  "js_of_ocaml-ocaml_version-ppx.patch"
   "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
   "js_of_ocaml-fix-build_fs.patch"
   "js_of_ocaml-iarray-primitives.patch"
@@ -70,8 +69,12 @@ patches: [
   "js_of_ocaml-5.3-tests-runtime.patch"
   "js_of_ocaml-caml_bigstring_strncmp.patch"
   "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
+  "js_of_ocaml-version-directive-removal.patch"
+  "js_of_ocaml-obj_stubs.patch"
   "js_of_ocaml-float32-2.patch"
   "dune.patch"
+  "js_of_ocaml-top-effects.patch"
+  "js_of_ocaml-toplevel.patch"
 ]
 extra-files: [
   [
@@ -102,10 +105,6 @@ extra-files: [
     "js_of_ocaml-remove-float-externals.patch"
     "sha256=a3aa95ee08210377c1470e5bf0f832bc27ad98299bca22c7a88eb9fd6c32e655"
   ]
-  [
-    "js_of_ocaml-ocaml_version-ppx.patch"
-    "sha256=df6bcb6da8aa3dfd6bd0a178679987d41c400ec1803f4a66659cfc822d1b280f"
-  ]
   [
     "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
     "sha256=00d38ead67c67220351605d72c2b3a4e3faa8053087ef8ab47b7067b42900ba9"
@@ -214,6 +213,14 @@ extra-files: [
     "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
     "sha256=005bce63009b9539b65036b22a7b7cc531755c7caa3cf1ed8d8697698090e136"
   ]
+  [
+    "js_of_ocaml-version-directive-removal.patch"
+    "sha256=4b1565454d0b61bc2450ab7b5fff8c5c82babc104ea6b7b9a5446eb9a929740c"
+  ]
+  [
+    "js_of_ocaml-obj_stubs.patch"
+    "sha256=9e9064f255c065a3152f665bd5b464040f3cfbbd2580aa4bb6e17be9c2b7fcc8"
+  ]
   [
     "js_of_ocaml-float32-2.patch"
     "sha256=3ff1eda6175f96cc3a5b2c2ae1ee395c9317d248554282c5f157c723a9fae32f"
@@ -222,4 +229,12 @@ extra-files: [
     "dune.patch"
     "sha256=f76da998ab76de56309bd0da3e4db1fb496d6d235d7a0ac2f78e3bafe098714e"
   ]
+  [
+   "js_of_ocaml-top-effects.patch"
+   "sha256=638247bd3f7bacb99612353b29c0afdcc48598c5771a52602a96baabbc141370"
+  ]
+  [
+   "js_of_ocaml-toplevel.patch"
+   "sha256=56c305aa9ed8cb35e9a3bee9fb17aaae244522bacb54a78115b03182a746b7b2"
+  ]
 ]
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
new file mode 100644
index 0000000000..abc1cf740b
--- /dev/null
+++ b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
@@ -0,0 +1,49 @@
+--- a/runtime/js/obj.js
++++ b/runtime/js/obj.js
+@@ -44,6 +44,22 @@
+   return +Array.isArray(x);
+ }
+
++//Provides: caml_obj_is_stack
++function caml_obj_is_stack(x) {
++  return 0;
++}
++
++//Provides: caml_succ_scannable_prefix_len
++function caml_succ_scannable_prefix_len(x) {
++  return 0;
++}
++
++//Provides: caml_obj_uniquely_reachable_words
++//Requires: caml_failwith
++function caml_obj_uniquely_reachable_words(x) {
++  caml_failwith("Obj.uniquely_reachable_words is not available in javascript.");
++}
++
+ //Provides: caml_obj_tag
+ //Requires: caml_is_ml_bytes, caml_is_ml_string
+ function caml_obj_tag(x) {
+--- a/runtime/wasm/obj.wat
++++ b/runtime/wasm/obj.wat
+@@ -101,6 +101,21 @@
+    (global $double_array_tag (export "double_array_tag") i32 (i32.const 254))
+    (global $custom_tag i32 (i32.const 255))
+
++   (func (export "caml_obj_is_stack")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (func (export "caml_succ_scannable_prefix_len")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (@string $unique_words_unsupported "Obj.uniquely_reachable_words is not available in wasm.")
++
++   (func (export "caml_obj_uniquely_reachable_words")
++      (param (ref eq)) (result (ref eq))
++      (call $caml_failwith (global.get $unique_words_unsupported))
++      (ref.i31 (i32.const 0)))
++
+    (func $caml_is_closure (export "caml_is_closure")
+       (param $v (ref eq)) (result i32)
+       (i32.or (ref.test (ref $closure) (local.get $v))
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
deleted file mode 100644
index d82b9d1fb8..0000000000
--- a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
+++ /dev/null
@@ -1,24 +0,0 @@
---- a/toplevel/lib/jsooTop.ml
-+++ b/toplevel/lib/jsooTop.ml
-@@ -65,6 +65,7 @@
-     p := !p + len'';
-     len''
-
-+[%%if ocaml_version < (4, 14, 0)]
- let use ffp content =
-   let fname, oc =
-     Filename.open_temp_file ~mode:[ Open_binary ] "jsoo_toplevel" "fake_stdin"
-@@ -78,10 +79,11 @@
-   with e ->
-     Sys.remove fname;
-     raise e
--[@@if ocaml_version < (4, 14, 0)]
-+[%%endif]
-
-+[%%if ocaml_version >= (4, 14, 0)]
- let use ffp content = Toploop.use_silently ffp (String content)
--[@@if ocaml_version >= (4, 14, 0)]
-+[%%endif]
-
- let execute printval ?pp_code ?highlight_location pp_answer s =
-   let lb = Lexing.from_function (refill_lexbuf s (ref 0) pp_code) in
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-top-effects.patch b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-top-effects.patch
new file mode 100644
index 0000000000..d2f36b6d7b
--- /dev/null
+++ b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-top-effects.patch
@@ -0,0 +1,16 @@
+diff --git a/runtime/js/jslib.js b/runtime/js/jslib.js
+index 6a711bbb1d..081361a841 100644
+--- a/runtime/js/jslib.js
++++ b/runtime/js/jslib.js
+@@ -134,8 +134,9 @@ function caml_jsoo_flags_use_js_string(unit) {
+ }
+ 
+ //Provides: caml_jsoo_flags_effects
++//Requires: caml_string_of_jsstring
+ function caml_jsoo_flags_effects(unit) {
+-  return CONFIG("effects");
++  return caml_string_of_jsstring(CONFIG("effects"));
+ }
+ 
+ //Provides: caml_wrap_exception const (mutable)
+
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-toplevel.patch b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-toplevel.patch
new file mode 100644
index 0000000000..c291dee46c
--- /dev/null
+++ b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-toplevel.patch
@@ -0,0 +1,208 @@
+diff --git a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+index 140a53b..d857289 100644
+--- a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
++++ b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+@@ -4,7 +4,7 @@ module J = Jsoo_runtime.Js
+
+ type bytecode_sections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+diff --git a/compiler/lib/link_js.ml b/compiler/lib/link_js.ml
+index 68f0c32..3ec9ddc 100644
+--- a/compiler/lib/link_js.ml
++++ b/compiler/lib/link_js.ml
+@@ -426,7 +426,7 @@ let link ~output ~linkall ~mklib ~toplevel ~files ~resolve_sourcemap_url ~(sourc
+             List.fold_left units ~init:StringSet.empty ~f:(fun acc (u : Unit_info.t) ->
+                 StringSet.union acc (StringSet.of_list u.primitives))
+           in
+-          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[] in
++          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[||] in
+           let b = Buffer.create 100 in
+           let fmt = Pretty_print.to_buffer b in
+           Driver.configure fmt;
+diff --git a/compiler/lib/parse_bytecode.ml b/compiler/lib/parse_bytecode.ml
+index 79e0c8f..bf8751a 100644
+--- a/compiler/lib/parse_bytecode.ml
++++ b/compiler/lib/parse_bytecode.ml
+@@ -35,6 +35,9 @@ let predefined_exceptions =
+
+ let new_closure_repr = Ocaml_version.compare Ocaml_version.current [ 4; 12 ] >= 0
+
++let crc_name v = Import_info.name v |> Compilation_unit.Name.to_string
++let crc_crc v = Import_info.crc v
++
+ (* Read and manipulate debug section *)
+ module Debug : sig
+   type t
+@@ -76,11 +79,11 @@ module Debug : sig
+     -> unit
+
+   val read :
+-    t -> crcs:(string * string option) list -> includes:string list -> in_channel -> unit
++    t -> crcs:Import_info.t list -> includes:string list -> in_channel -> unit
+
+   val read_event_list :
+        t
+-    -> crcs:(string * string option) list
++    -> crcs:Import_info.t list
+     -> includes:string list
+     -> orig:int
+     -> in_channel
+@@ -146,6 +149,7 @@ end = struct
+     | Some _ as x -> x
+     | None -> Fs.find_in_path paths (name ^ ".ml")
+
++
+   let read_event
+       ~paths
+       ~crcs
+@@ -216,7 +220,7 @@ end = struct
+     fun debug ~crcs ~includes ~orig ic ->
+       let crcs =
+         let t = Hashtbl.create 17 in
+-        List.iter crcs ~f:(fun (m, crc) -> Hashtbl.add t m crc);
++        List.iter crcs ~f:(fun i -> Hashtbl.add t (crc_name i) (crc_crc i));
+         t
+       in
+       let evl : debug_event list = input_value ic in
+@@ -2520,7 +2524,7 @@ module Toc : sig
+
+   val read_data : t -> in_channel -> Obj.t array
+
+-  val read_crcs : t -> in_channel -> (string * Digest.t option) list
++  val read_crcs : t -> in_channel -> Import_info.t array
+
+   val read_prim : t -> in_channel -> string
+
+@@ -2570,9 +2574,10 @@ end = struct
+   let read_crcs toc ic =
+     ignore (seek_section toc ic "CRCS");
+     let orig_crcs : Import_info.t array = input_value ic in
+-    List.map (Array.to_list orig_crcs) ~f:(fun import ->
+-      Import_info.name import |> Compilation_unit.Name.to_string,
+-      Import_info.crc import)
++    orig_crcs
++    (* List.map (Array.to_list orig_crcs) ~f:(fun import -> *)
++    (*   Import_info.name import |> Compilation_unit.Name.to_string, *)
++    (*   Import_info.crc import) *)
+
+   let read_prim toc ic =
+     let prim_size = seek_section toc ic "PRIM" in
+@@ -2587,12 +2592,13 @@ let read_primitives toc ic =
+
+ type bytesections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+ [@@ocaml.warning "-unused-field"]
+
++
+ let from_exe
+     ?(includes = [])
+     ~linkall
+@@ -2625,7 +2631,7 @@ let from_exe
+       | Some l -> List.mem s ~set:l
+       | None -> true)
+   in
+-  let crcs = List.filter ~f:(fun (unit, _crc) -> keep unit) orig_crcs in
++  let crcs = List.filter ~f:(fun info -> keep (crc_name info)) (Array.to_list orig_crcs) in
+   let symbols =
+     Ocaml_compiler.Symtable.GlobalMap.filter
+       (function
+@@ -2690,7 +2696,7 @@ let from_exe
+         |> Array.of_list
+       in
+       (* Include linking information *)
+-      let sections = { symb = symbols; crcs; prim = primitives; dlpt = [] } in
++      let sections = { symb = symbols; crcs = Array.of_list crcs; prim = primitives; dlpt = [] } in
+       let gdata = Var.fresh () in
+       let need_gdata = ref false in
+       let infos =
+diff --git a/compiler/lib/parse_bytecode.mli b/compiler/lib/parse_bytecode.mli
+index 7bcc822..b34113b 100644
+--- a/compiler/lib/parse_bytecode.mli
++++ b/compiler/lib/parse_bytecode.mli
+@@ -91,5 +91,5 @@ val predefined_exceptions : unit -> Code.program * Unit_info.t
+ val link_info :
+      symbols:Ocaml_compiler.Symtable.GlobalMap.t
+   -> primitives:StringSet.t
+-  -> crcs:(string * Digest.t option) list
++  -> crcs:Import_info.t array
+   -> Code.program
+diff --git a/runtime/js/capsule.js b/runtime/js/capsule.js
+new file mode 100644
+index 0000000..0c02acc
+--- /dev/null
++++ b/runtime/js/capsule.js
+@@ -0,0 +1,14 @@
++//Provides: caml_capsule_mutex_new
++function caml_capsule_mutex_new () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_lock
++function caml_capsule_mutex_lock () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_unlock
++function caml_capsule_mutex_unlock () {
++  return 0;
++}
+diff --git a/runtime/js/dune b/runtime/js/dune
+index f31ffd1..7e76a14 100644
+--- a/runtime/js/dune
++++ b/runtime/js/dune
+@@ -4,6 +4,7 @@
+  (files
+   bigarray.js
+   bigstring.js
++  capsule.js
+   dynlink.js
+   fs.js
+   fs_fake.js
+diff --git a/runtime/js/float32.js b/runtime/js/float32.js
+index 0c60d3d..74bb433 100644
+--- a/runtime/js/float32.js
++++ b/runtime/js/float32.js
+@@ -12,6 +12,11 @@
+     by native programs and vice versa.
+ */
+
++//Provides: caml_is_boot_compiler
++function caml_is_boot_compiler(x) {
++  return 0;
++}
++
+ //Provides: caml_float_of_float32 const
+ function caml_float_of_float32(x) {
+     return x;
+diff --git a/runtime/js/toplevel.js b/runtime/js/toplevel.js
+index 2e4547e..adaffd3 100644
+--- a/runtime/js/toplevel.js
++++ b/runtime/js/toplevel.js
+@@ -94,7 +94,7 @@ function jsoo_toplevel_init_reloc(f) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_ba_to_typed_array
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: >= 5.2
++//Version: >= 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
+@@ -107,7 +107,7 @@ function caml_reify_bytecode(code, debug, _digest) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_uint8_array_of_bytes
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: < 5.2
++//Version: < 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
new file mode 100644
index 0000000000..37cd43ed47
--- /dev/null
+++ b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
@@ -0,0 +1,10 @@
+--- a/runtime/js/stdlib.js
++++ b/runtime/js/stdlib.js
+@@ -302,7 +302,6 @@
+ }
+
+ //Provides: caml_process_pending_actions_with_root
+-//Version: >= 5.3
+ function caml_process_pending_actions_with_root(extra_root) {
+   return 0;
+ }
diff --git a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/opam b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/opam
index 3ab118d373..7c920967f9 100644
--- a/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/opam
+++ b/packages/js_of_ocaml-toplevel/js_of_ocaml-toplevel.6.0.1+ox/opam
@@ -45,7 +45,6 @@ patches: [
   "js_of_ocaml-add-unboxed-and-float-block.patch"
   "js_of_ocaml-ident-is_global.patch"
   "js_of_ocaml-remove-float-externals.patch"
-  "js_of_ocaml-ocaml_version-ppx.patch"
   "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
   "js_of_ocaml-fix-build_fs.patch"
   "js_of_ocaml-iarray-primitives.patch"
@@ -73,8 +72,12 @@ patches: [
   "js_of_ocaml-5.3-tests-runtime.patch"
   "js_of_ocaml-caml_bigstring_strncmp.patch"
   "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
+  "js_of_ocaml-version-directive-removal.patch"
+  "js_of_ocaml-obj_stubs.patch"
   "js_of_ocaml-float32-2.patch"
   "dune.patch"
+  "js_of_ocaml-top-effects.patch"
+  "js_of_ocaml-toplevel.patch"
 ]
 extra-files: [
   [
@@ -105,10 +108,6 @@ extra-files: [
     "js_of_ocaml-remove-float-externals.patch"
     "sha256=a3aa95ee08210377c1470e5bf0f832bc27ad98299bca22c7a88eb9fd6c32e655"
   ]
-  [
-    "js_of_ocaml-ocaml_version-ppx.patch"
-    "sha256=df6bcb6da8aa3dfd6bd0a178679987d41c400ec1803f4a66659cfc822d1b280f"
-  ]
   [
     "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
     "sha256=00d38ead67c67220351605d72c2b3a4e3faa8053087ef8ab47b7067b42900ba9"
@@ -217,6 +216,14 @@ extra-files: [
     "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
     "sha256=005bce63009b9539b65036b22a7b7cc531755c7caa3cf1ed8d8697698090e136"
   ]
+  [
+    "js_of_ocaml-version-directive-removal.patch"
+    "sha256=4b1565454d0b61bc2450ab7b5fff8c5c82babc104ea6b7b9a5446eb9a929740c"
+  ]
+  [
+    "js_of_ocaml-obj_stubs.patch"
+    "sha256=9e9064f255c065a3152f665bd5b464040f3cfbbd2580aa4bb6e17be9c2b7fcc8"
+  ]
   [
     "js_of_ocaml-float32-2.patch"
     "sha256=3ff1eda6175f96cc3a5b2c2ae1ee395c9317d248554282c5f157c723a9fae32f"
@@ -225,4 +232,12 @@ extra-files: [
     "dune.patch"
     "sha256=f76da998ab76de56309bd0da3e4db1fb496d6d235d7a0ac2f78e3bafe098714e"
   ]
+  [
+   "js_of_ocaml-top-effects.patch"
+   "sha256=638247bd3f7bacb99612353b29c0afdcc48598c5771a52602a96baabbc141370"
+  ]
+  [
+   "js_of_ocaml-toplevel.patch"
+   "sha256=56c305aa9ed8cb35e9a3bee9fb17aaae244522bacb54a78115b03182a746b7b2"
+  ]
 ]
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
new file mode 100644
index 0000000000..abc1cf740b
--- /dev/null
+++ b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-obj_stubs.patch
@@ -0,0 +1,49 @@
+--- a/runtime/js/obj.js
++++ b/runtime/js/obj.js
+@@ -44,6 +44,22 @@
+   return +Array.isArray(x);
+ }
+
++//Provides: caml_obj_is_stack
++function caml_obj_is_stack(x) {
++  return 0;
++}
++
++//Provides: caml_succ_scannable_prefix_len
++function caml_succ_scannable_prefix_len(x) {
++  return 0;
++}
++
++//Provides: caml_obj_uniquely_reachable_words
++//Requires: caml_failwith
++function caml_obj_uniquely_reachable_words(x) {
++  caml_failwith("Obj.uniquely_reachable_words is not available in javascript.");
++}
++
+ //Provides: caml_obj_tag
+ //Requires: caml_is_ml_bytes, caml_is_ml_string
+ function caml_obj_tag(x) {
+--- a/runtime/wasm/obj.wat
++++ b/runtime/wasm/obj.wat
+@@ -101,6 +101,21 @@
+    (global $double_array_tag (export "double_array_tag") i32 (i32.const 254))
+    (global $custom_tag i32 (i32.const 255))
+
++   (func (export "caml_obj_is_stack")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (func (export "caml_succ_scannable_prefix_len")
++      (param (ref eq)) (result (ref eq))
++      (ref.i31 (i32.const 0)))
++
++   (@string $unique_words_unsupported "Obj.uniquely_reachable_words is not available in wasm.")
++
++   (func (export "caml_obj_uniquely_reachable_words")
++      (param (ref eq)) (result (ref eq))
++      (call $caml_failwith (global.get $unique_words_unsupported))
++      (ref.i31 (i32.const 0)))
++
+    (func $caml_is_closure (export "caml_is_closure")
+       (param $v (ref eq)) (result i32)
+       (i32.or (ref.test (ref $closure) (local.get $v))
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
deleted file mode 100644
index d82b9d1fb8..0000000000
--- a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-ocaml_version-ppx.patch
+++ /dev/null
@@ -1,24 +0,0 @@
---- a/toplevel/lib/jsooTop.ml
-+++ b/toplevel/lib/jsooTop.ml
-@@ -65,6 +65,7 @@
-     p := !p + len'';
-     len''
-
-+[%%if ocaml_version < (4, 14, 0)]
- let use ffp content =
-   let fname, oc =
-     Filename.open_temp_file ~mode:[ Open_binary ] "jsoo_toplevel" "fake_stdin"
-@@ -78,10 +79,11 @@
-   with e ->
-     Sys.remove fname;
-     raise e
--[@@if ocaml_version < (4, 14, 0)]
-+[%%endif]
-
-+[%%if ocaml_version >= (4, 14, 0)]
- let use ffp content = Toploop.use_silently ffp (String content)
--[@@if ocaml_version >= (4, 14, 0)]
-+[%%endif]
-
- let execute printval ?pp_code ?highlight_location pp_answer s =
-   let lb = Lexing.from_function (refill_lexbuf s (ref 0) pp_code) in
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-top-effects.patch b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-top-effects.patch
new file mode 100644
index 0000000000..d2f36b6d7b
--- /dev/null
+++ b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-top-effects.patch
@@ -0,0 +1,16 @@
+diff --git a/runtime/js/jslib.js b/runtime/js/jslib.js
+index 6a711bbb1d..081361a841 100644
+--- a/runtime/js/jslib.js
++++ b/runtime/js/jslib.js
+@@ -134,8 +134,9 @@ function caml_jsoo_flags_use_js_string(unit) {
+ }
+ 
+ //Provides: caml_jsoo_flags_effects
++//Requires: caml_string_of_jsstring
+ function caml_jsoo_flags_effects(unit) {
+-  return CONFIG("effects");
++  return caml_string_of_jsstring(CONFIG("effects"));
+ }
+ 
+ //Provides: caml_wrap_exception const (mutable)
+
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-toplevel.patch b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-toplevel.patch
new file mode 100644
index 0000000000..c291dee46c
--- /dev/null
+++ b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-toplevel.patch
@@ -0,0 +1,208 @@
+diff --git a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+index 140a53b..d857289 100644
+--- a/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
++++ b/compiler/lib-dynlink/js_of_ocaml_compiler_dynlink.ml
+@@ -4,7 +4,7 @@ module J = Jsoo_runtime.Js
+
+ type bytecode_sections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+diff --git a/compiler/lib/link_js.ml b/compiler/lib/link_js.ml
+index 68f0c32..3ec9ddc 100644
+--- a/compiler/lib/link_js.ml
++++ b/compiler/lib/link_js.ml
+@@ -426,7 +426,7 @@ let link ~output ~linkall ~mklib ~toplevel ~files ~resolve_sourcemap_url ~(sourc
+             List.fold_left units ~init:StringSet.empty ~f:(fun acc (u : Unit_info.t) ->
+                 StringSet.union acc (StringSet.of_list u.primitives))
+           in
+-          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[] in
++          let code = Parse_bytecode.link_info ~symbols:!sym ~primitives ~crcs:[||] in
+           let b = Buffer.create 100 in
+           let fmt = Pretty_print.to_buffer b in
+           Driver.configure fmt;
+diff --git a/compiler/lib/parse_bytecode.ml b/compiler/lib/parse_bytecode.ml
+index 79e0c8f..bf8751a 100644
+--- a/compiler/lib/parse_bytecode.ml
++++ b/compiler/lib/parse_bytecode.ml
+@@ -35,6 +35,9 @@ let predefined_exceptions =
+
+ let new_closure_repr = Ocaml_version.compare Ocaml_version.current [ 4; 12 ] >= 0
+
++let crc_name v = Import_info.name v |> Compilation_unit.Name.to_string
++let crc_crc v = Import_info.crc v
++
+ (* Read and manipulate debug section *)
+ module Debug : sig
+   type t
+@@ -76,11 +79,11 @@ module Debug : sig
+     -> unit
+
+   val read :
+-    t -> crcs:(string * string option) list -> includes:string list -> in_channel -> unit
++    t -> crcs:Import_info.t list -> includes:string list -> in_channel -> unit
+
+   val read_event_list :
+        t
+-    -> crcs:(string * string option) list
++    -> crcs:Import_info.t list
+     -> includes:string list
+     -> orig:int
+     -> in_channel
+@@ -146,6 +149,7 @@ end = struct
+     | Some _ as x -> x
+     | None -> Fs.find_in_path paths (name ^ ".ml")
+
++
+   let read_event
+       ~paths
+       ~crcs
+@@ -216,7 +220,7 @@ end = struct
+     fun debug ~crcs ~includes ~orig ic ->
+       let crcs =
+         let t = Hashtbl.create 17 in
+-        List.iter crcs ~f:(fun (m, crc) -> Hashtbl.add t m crc);
++        List.iter crcs ~f:(fun i -> Hashtbl.add t (crc_name i) (crc_crc i));
+         t
+       in
+       let evl : debug_event list = input_value ic in
+@@ -2520,7 +2524,7 @@ module Toc : sig
+
+   val read_data : t -> in_channel -> Obj.t array
+
+-  val read_crcs : t -> in_channel -> (string * Digest.t option) list
++  val read_crcs : t -> in_channel -> Import_info.t array
+
+   val read_prim : t -> in_channel -> string
+
+@@ -2570,9 +2574,10 @@ end = struct
+   let read_crcs toc ic =
+     ignore (seek_section toc ic "CRCS");
+     let orig_crcs : Import_info.t array = input_value ic in
+-    List.map (Array.to_list orig_crcs) ~f:(fun import ->
+-      Import_info.name import |> Compilation_unit.Name.to_string,
+-      Import_info.crc import)
++    orig_crcs
++    (* List.map (Array.to_list orig_crcs) ~f:(fun import -> *)
++    (*   Import_info.name import |> Compilation_unit.Name.to_string, *)
++    (*   Import_info.crc import) *)
+
+   let read_prim toc ic =
+     let prim_size = seek_section toc ic "PRIM" in
+@@ -2587,12 +2592,13 @@ let read_primitives toc ic =
+
+ type bytesections =
+   { symb : Ocaml_compiler.Symtable.GlobalMap.t
+-  ; crcs : (string * Digest.t option) list
++  ; crcs : Import_info.t array
+   ; prim : string list
+   ; dlpt : string list
+   }
+ [@@ocaml.warning "-unused-field"]
+
++
+ let from_exe
+     ?(includes = [])
+     ~linkall
+@@ -2625,7 +2631,7 @@ let from_exe
+       | Some l -> List.mem s ~set:l
+       | None -> true)
+   in
+-  let crcs = List.filter ~f:(fun (unit, _crc) -> keep unit) orig_crcs in
++  let crcs = List.filter ~f:(fun info -> keep (crc_name info)) (Array.to_list orig_crcs) in
+   let symbols =
+     Ocaml_compiler.Symtable.GlobalMap.filter
+       (function
+@@ -2690,7 +2696,7 @@ let from_exe
+         |> Array.of_list
+       in
+       (* Include linking information *)
+-      let sections = { symb = symbols; crcs; prim = primitives; dlpt = [] } in
++      let sections = { symb = symbols; crcs = Array.of_list crcs; prim = primitives; dlpt = [] } in
+       let gdata = Var.fresh () in
+       let need_gdata = ref false in
+       let infos =
+diff --git a/compiler/lib/parse_bytecode.mli b/compiler/lib/parse_bytecode.mli
+index 7bcc822..b34113b 100644
+--- a/compiler/lib/parse_bytecode.mli
++++ b/compiler/lib/parse_bytecode.mli
+@@ -91,5 +91,5 @@ val predefined_exceptions : unit -> Code.program * Unit_info.t
+ val link_info :
+      symbols:Ocaml_compiler.Symtable.GlobalMap.t
+   -> primitives:StringSet.t
+-  -> crcs:(string * Digest.t option) list
++  -> crcs:Import_info.t array
+   -> Code.program
+diff --git a/runtime/js/capsule.js b/runtime/js/capsule.js
+new file mode 100644
+index 0000000..0c02acc
+--- /dev/null
++++ b/runtime/js/capsule.js
+@@ -0,0 +1,14 @@
++//Provides: caml_capsule_mutex_new
++function caml_capsule_mutex_new () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_lock
++function caml_capsule_mutex_lock () {
++  return 0;
++}
++
++//Provides: caml_capsule_mutex_unlock
++function caml_capsule_mutex_unlock () {
++  return 0;
++}
+diff --git a/runtime/js/dune b/runtime/js/dune
+index f31ffd1..7e76a14 100644
+--- a/runtime/js/dune
++++ b/runtime/js/dune
+@@ -4,6 +4,7 @@
+  (files
+   bigarray.js
+   bigstring.js
++  capsule.js
+   dynlink.js
+   fs.js
+   fs_fake.js
+diff --git a/runtime/js/float32.js b/runtime/js/float32.js
+index 0c60d3d..74bb433 100644
+--- a/runtime/js/float32.js
++++ b/runtime/js/float32.js
+@@ -12,6 +12,11 @@
+     by native programs and vice versa.
+ */
+
++//Provides: caml_is_boot_compiler
++function caml_is_boot_compiler(x) {
++  return 0;
++}
++
+ //Provides: caml_float_of_float32 const
+ function caml_float_of_float32(x) {
+     return x;
+diff --git a/runtime/js/toplevel.js b/runtime/js/toplevel.js
+index 2e4547e..adaffd3 100644
+--- a/runtime/js/toplevel.js
++++ b/runtime/js/toplevel.js
+@@ -94,7 +94,7 @@ function jsoo_toplevel_init_reloc(f) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_ba_to_typed_array
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: >= 5.2
++//Version: >= 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
+@@ -107,7 +107,7 @@ function caml_reify_bytecode(code, debug, _digest) {
+ //Requires: caml_callback
+ //Requires: caml_string_of_uint8_array, caml_uint8_array_of_bytes
+ //Requires: jsoo_toplevel_compile, caml_failwith
+-//Version: < 5.2
++//Version: < 5.3
+ function caml_reify_bytecode(code, debug, _digest) {
+   if (!jsoo_toplevel_compile) {
+     caml_failwith("Toplevel not initialized (jsoo_toplevel_compile)");
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
new file mode 100644
index 0000000000..37cd43ed47
--- /dev/null
+++ b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/files/js_of_ocaml-version-directive-removal.patch
@@ -0,0 +1,10 @@
+--- a/runtime/js/stdlib.js
++++ b/runtime/js/stdlib.js
+@@ -302,7 +302,6 @@
+ }
+
+ //Provides: caml_process_pending_actions_with_root
+-//Version: >= 5.3
+ function caml_process_pending_actions_with_root(extra_root) {
+   return 0;
+ }
diff --git a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/opam b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/opam
index a394cc27a5..8dacb8ffdc 100644
--- a/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/opam
+++ b/packages/js_of_ocaml/js_of_ocaml.6.0.1+ox/opam
@@ -42,7 +42,6 @@ patches: [
   "js_of_ocaml-add-unboxed-and-float-block.patch"
   "js_of_ocaml-ident-is_global.patch"
   "js_of_ocaml-remove-float-externals.patch"
-  "js_of_ocaml-ocaml_version-ppx.patch"
   "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
   "js_of_ocaml-fix-build_fs.patch"
   "js_of_ocaml-iarray-primitives.patch"
@@ -70,8 +69,12 @@ patches: [
   "js_of_ocaml-5.3-tests-runtime.patch"
   "js_of_ocaml-caml_bigstring_strncmp.patch"
   "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
+  "js_of_ocaml-version-directive-removal.patch"
+  "js_of_ocaml-obj_stubs.patch"
   "js_of_ocaml-float32-2.patch"
   "dune.patch"
+  "js_of_ocaml-top-effects.patch"
+  "js_of_ocaml-toplevel.patch"
 ]
 extra-files: [
   [
@@ -102,10 +105,6 @@ extra-files: [
     "js_of_ocaml-remove-float-externals.patch"
     "sha256=a3aa95ee08210377c1470e5bf0f832bc27ad98299bca22c7a88eb9fd6c32e655"
   ]
-  [
-    "js_of_ocaml-ocaml_version-ppx.patch"
-    "sha256=df6bcb6da8aa3dfd6bd0a178679987d41c400ec1803f4a66659cfc822d1b280f"
-  ]
   [
     "js_of_ocaml-test-diffs-caused-by-build-differences.patch"
     "sha256=00d38ead67c67220351605d72c2b3a4e3faa8053087ef8ab47b7067b42900ba9"
@@ -214,6 +213,14 @@ extra-files: [
     "wasm_of_ocaml-stub-caml_ml_set_channel_refill.patch"
     "sha256=005bce63009b9539b65036b22a7b7cc531755c7caa3cf1ed8d8697698090e136"
   ]
+  [
+    "js_of_ocaml-version-directive-removal.patch"
+    "sha256=4b1565454d0b61bc2450ab7b5fff8c5c82babc104ea6b7b9a5446eb9a929740c"
+  ]
+  [
+    "js_of_ocaml-obj_stubs.patch"
+    "sha256=9e9064f255c065a3152f665bd5b464040f3cfbbd2580aa4bb6e17be9c2b7fcc8"
+  ]
   [
     "js_of_ocaml-float32-2.patch"
     "sha256=3ff1eda6175f96cc3a5b2c2ae1ee395c9317d248554282c5f157c723a9fae32f"
@@ -222,4 +229,12 @@ extra-files: [
     "dune.patch"
     "sha256=f76da998ab76de56309bd0da3e4db1fb496d6d235d7a0ac2f78e3bafe098714e"
   ]
+  [
+   "js_of_ocaml-top-effects.patch"
+   "sha256=638247bd3f7bacb99612353b29c0afdcc48598c5771a52602a96baabbc141370"
+  ]
+  [
+   "js_of_ocaml-toplevel.patch"
+   "sha256=56c305aa9ed8cb35e9a3bee9fb17aaae244522bacb54a78115b03182a746b7b2"
+  ]
 ]