diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f649d95..3f83f65 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,6 +41,7 @@ jobs:
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
         uses: ocaml/setup-ocaml@v2
         with:
+          cache-prefix: v2
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
           opam-depext-flags: --with-test
           opam-local-packages: |
@@ -49,14 +50,16 @@ jobs:
 
       - run: opam install "${{ matrix.package }}" --with-test
 
-  build-node:
+  build-melange:
     strategy:
       fail-fast: false
       matrix:
         os:
           - ubuntu-latest
-        node-version:
-          - 16.x
+        ocaml-compiler:
+          - 5.1.x
+        package:
+          - melange-decoders
 
     runs-on: ${{ matrix.os }}
 
@@ -66,9 +69,20 @@ jobs:
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 16.x
           cache: 'npm'
 
       - run: npm ci
-      - run: npm run build
-      - run: npm test
+
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          opam-depext-flags: --with-test
+          opam-local-packages: |
+            decoders.opam
+            ${{ matrix.package }}.opam
+
+      - run: opam install "${{ matrix.package }}" --with-test
+      - run: opam exec -- dune build @melange
+      - run: npx jest
diff --git a/Makefile b/Makefile
index d9ccc5c..437e303 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 .PHONY: all
-all: build test build-bs test-bs
+all: build test build-bs test-bs test-mel
 
 .PHONY: clean-all
 clean-all: clean clean-bs
@@ -34,9 +34,9 @@ clean:
 
 _opam:
 	opam switch create . --empty
-	opam install -y ocaml-base-compiler.4.12.0 utop ocaml-lsp-server
 
 install-dependencies: _opam
+	opam switch set-invariant ocaml-base-compiler.5.1.1
 	opam install . --deps-only --with-test
 
 DOCS_WORKTREE_PATH=../ocaml-decoders-doc
@@ -61,11 +61,11 @@ build-bs:
 test-bs:
 	npm test
 
-watch-build-bs:
-	npm run build-watch
-
-watch-test-bs:
-	npm run test-watch
-
 clean-bs:
 	npm run clean
+
+build-mel:
+	dune build @melange
+
+test-mel:
+	npx jest _build/default/out/
diff --git a/__tests__/decoders_bs_json_test.ml b/__tests__/decoders_js_json_test.ml
similarity index 96%
rename from __tests__/decoders_bs_json_test.ml
rename to __tests__/decoders_js_json_test.ml
index bfae460..330b515 100644
--- a/__tests__/decoders_bs_json_test.ml
+++ b/__tests__/decoders_js_json_test.ml
@@ -1,7 +1,7 @@
 open Jest
-open Bs_json
+open Js_json
 
-external parse_int : string -> int = "parseInt" [@@bs.scope "window"] [@@bs.val]
+external parse_int : string -> int = "parseInt" [@@mel.scope "window"] [@@mel.val]
 
 let () =
   describe
diff --git a/__tests__/decoders_bs_xml_test.ml b/__tests__/decoders_js_xml_test.ml
similarity index 99%
rename from __tests__/decoders_bs_xml_test.ml
rename to __tests__/decoders_js_xml_test.ml
index d6610ef..e3c80f1 100644
--- a/__tests__/decoders_bs_xml_test.ml
+++ b/__tests__/decoders_js_xml_test.ml
@@ -1,5 +1,5 @@
 open Jest
-open Bs_xml
+open Js_xml
 
 let () =
   describe
diff --git a/__tests__/dune b/__tests__/dune
new file mode 100644
index 0000000..df358b6
--- /dev/null
+++ b/__tests__/dune
@@ -0,0 +1,11 @@
+(subdir
+  melange
+ (library
+ (name decoders_tests_melange)
+ (modes melange)
+ (libraries decoders_mel melange-jest.jest)
+ (preprocess (pps melange.ppx))
+ (flags -open Decoders_mel)
+ (wrapped false))
+ (copy_files# "../*.ml")
+ (copy_files# "../*.re"))
diff --git a/bsconfig.json b/bsconfig.json
index 742c0c8..52c0cb6 100644
--- a/bsconfig.json
+++ b/bsconfig.json
@@ -18,7 +18,10 @@
       "xml.ml"
     ]
   }, {
-    "dir" : "src-bs"
+    "dir" : "src-js",
+    "files": {
+        "excludes": ["decoders_mel.ml"]
+    }
   }, {
     "dir": "__tests__",
     "type": "dev"
diff --git a/decoders-bencode.opam b/decoders-bencode.opam
index bfc0e21..1865743 100644
--- a/decoders-bencode.opam
+++ b/decoders-bencode.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "bencode" {>= "2.0"}
diff --git a/decoders-cbor.opam b/decoders-cbor.opam
index 50535eb..8d5779a 100644
--- a/decoders-cbor.opam
+++ b/decoders-cbor.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "cbor"
diff --git a/decoders-ezjsonm.opam b/decoders-ezjsonm.opam
index d0e0485..840720c 100644
--- a/decoders-ezjsonm.opam
+++ b/decoders-ezjsonm.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "ezjsonm" {>= "0.4.0"}
diff --git a/decoders-ezxmlm.opam b/decoders-ezxmlm.opam
index c5073d8..640fefa 100644
--- a/decoders-ezxmlm.opam
+++ b/decoders-ezxmlm.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "ezxmlm" {>= "1.1.0"}
diff --git a/decoders-jsonaf.opam b/decoders-jsonaf.opam
index 4a88fbb..af0253e 100644
--- a/decoders-jsonaf.opam
+++ b/decoders-jsonaf.opam
@@ -12,7 +12,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.10.0"}
   "decoders" {= version}
   "jsonaf" {>= "0.15.0"}
diff --git a/decoders-jsonm.opam b/decoders-jsonm.opam
index 7b398f8..ef57e19 100644
--- a/decoders-jsonm.opam
+++ b/decoders-jsonm.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "jsonm"
diff --git a/decoders-msgpck.opam b/decoders-msgpck.opam
index 6ac7f13..e6e503c 100644
--- a/decoders-msgpck.opam
+++ b/decoders-msgpck.opam
@@ -12,7 +12,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "msgpck" {>= "1.3"}
diff --git a/decoders-sexplib.opam b/decoders-sexplib.opam
index d1487c5..f862b9b 100644
--- a/decoders-sexplib.opam
+++ b/decoders-sexplib.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "sexplib0"
diff --git a/decoders-yojson.opam b/decoders-yojson.opam
index 44c5f3f..d7cc6f6 100644
--- a/decoders-yojson.opam
+++ b/decoders-yojson.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "decoders" {= version}
   "yojson" {>= "1.6.0"}
diff --git a/decoders.opam b/decoders.opam
index c5ade6f..4c1374c 100644
--- a/decoders.opam
+++ b/decoders.opam
@@ -10,9 +10,10 @@ homepage: "https://github.com/mattjbray/ocaml-decoders"
 doc: "https://mattjbray.github.io/ocaml-decoders/"
 bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
 depends: [
-  "dune" {>= "3.1"}
+  "dune" {>= "3.8"}
   "ocaml" {>= "4.03.0"}
   "odoc" {with-doc}
+  "melange"
   "containers" {with-test & >= "0.16"}
 ]
 build: [
diff --git a/dune b/dune
index 8765da5..fb3bfb7 100644
--- a/dune
+++ b/dune
@@ -1 +1,6 @@
-(dirs :standard \ node_modules)
+(dirs :standard __tests__ \ node_modules)
+
+(melange.emit
+ (target out)
+ (preprocess (pps melange.ppx))
+ (libraries decoders_mel decoders_tests_melange))
diff --git a/dune-project b/dune-project
index 1ff060a..bf122b6 100644
--- a/dune-project
+++ b/dune-project
@@ -1,4 +1,5 @@
-(lang dune 3.1)
+(lang dune 3.8)
+(using melange 0.1)
 (name decoders)
 (generate_opam_files true)
 (license ISC)
@@ -135,4 +136,21 @@
  (depends
   (ocaml (>= 4.03.0))
   (odoc :with-doc)
+   melange
   (containers (and :with-test (>= 0.16)))))
+
+;; melange lib convention is to put `melange-` as the prefix, rather than the
+;; suffix, which unfortunately contradicts the `decoders-` prefix convention
+(package
+ (name melange-decoders)
+ (synopsis "Melange backend for decoders")
+ (description
+   "A combinator library for \"decoding\" JSON-like values into your own Ocaml types, inspired by Elm's `Json.Decode` and `Json.Encode`.")
+ (depends
+  (ocaml (>= 4.14.1))
+  (odoc :with-doc)
+  (decoders (= :version))
+  (melange (>= 3.0.0))
+  (melange-fetch :with-test)
+  (melange-jest :with-test)
+  (melange-webapi :with-test)))
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..486c4d9
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1688392541,
+        "narHash": "sha256-lHrKvEkCPTUO+7tPfjIcb7Trk6k31rz18vkyqmkeJfY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea4c80b39be4c09702b0cb3b42eab59e2ba4f24b",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-22.11",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..ec4936b
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,11 @@
+{
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-22.11";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }@attrs:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in { devShells.default = import ./shell.nix { inherit pkgs; }; });
+}
diff --git a/melange-decoders.opam b/melange-decoders.opam
new file mode 100644
index 0000000..0397380
--- /dev/null
+++ b/melange-decoders.opam
@@ -0,0 +1,36 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis: "Melange backend for decoders"
+description:
+  "A combinator library for \"decoding\" JSON-like values into your own Ocaml types, inspired by Elm's `Json.Decode` and `Json.Encode`."
+maintainer: ["Matt Bray <mattjbray@gmail.com>"]
+authors: ["Matt Bray <mattjbray@gmail.com>"]
+license: "ISC"
+homepage: "https://github.com/mattjbray/ocaml-decoders"
+doc: "https://mattjbray.github.io/ocaml-decoders/"
+bug-reports: "https://github.com/mattjbray/ocaml-decoders/issues"
+depends: [
+  "dune" {>= "3.8"}
+  "ocaml" {>= "4.14.1"}
+  "odoc" {with-doc}
+  "decoders" {= version}
+  "melange" {>= "3.0.0"}
+  "melange-fetch" {with-test}
+  "melange-jest" {with-test}
+  "melange-webapi" {with-test}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/mattjbray/ocaml-decoders.git"
diff --git a/package.json b/package.json
index 7f4eddf..32c6f1e 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,6 @@
     "build": "bsb -make-world",
     "build-watch": "bsb -make-world -w",
     "test": "bsb -make-world && jest",
-    "test-watch": "jest --watch",
     "clean": "bsb -clean-world"
   },
   "repository": {
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..6f5b441
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,9 @@
+{ pkgs ? import <nixpkgs> { } }:
+pkgs.mkShell {
+  buildInputs =
+    [ pkgs.opam pkgs.pkg-config pkgs.gmp pkgs.zlib ]
+    ++ (if pkgs.stdenv.isDarwin then
+      (with pkgs.darwin.apple_sdk.frameworks; [ CoreServices Foundation ])
+    else
+      [ pkgs.inotify-tools ]);
+}
diff --git a/src-js/dune b/src-js/dune
new file mode 100644
index 0000000..7bc5b63
--- /dev/null
+++ b/src-js/dune
@@ -0,0 +1,6 @@
+(library
+ (name decoders_mel)
+ (public_name melange-decoders)
+ (preprocess (pps melange.ppx))
+ (modes melange)
+ (libraries decoders melange.dom melange.belt))
diff --git a/src-bs/bs_json.ml b/src-js/js_json.ml
similarity index 93%
rename from src-bs/bs_json.ml
rename to src-js/js_json.ml
index ddbb981..b2547de 100644
--- a/src-bs/bs_json.ml
+++ b/src-js/js_json.ml
@@ -70,10 +70,10 @@ module Decode = struct
               let oks, errs =
                 arr
                 |> Js.Array.reducei
-                     (fun (oks, errs) x i ->
+                     ~f:(fun (oks, errs) x i ->
                        match decoder.dec x with
                        | Ok a ->
-                           let _ = Js.Array.push a oks in
+                           let _ = Js.Array.push ~value:a oks in
                            (oks, errs)
                        | Error e ->
                            let _ =
@@ -82,7 +82,7 @@ module Decode = struct
                                errs
                            in
                            (oks, errs) )
-                     ([||], [||])
+                     ~init:([||], [||])
               in
               if Js.Array.length errs > 0
               then
@@ -123,5 +123,5 @@ module Encode = struct
   include Encode.Make (Json_encodeable)
 
   let array encoder xs =
-    xs |> Js.Array.map (fun x -> encoder x) |> Js.Json.array
+    xs |> Js.Array.map ~f:(fun x -> encoder x) |> Js.Json.array
 end
diff --git a/src-bs/bs_json.mli b/src-js/js_json.mli
similarity index 100%
rename from src-bs/bs_json.mli
rename to src-js/js_json.mli
diff --git a/src-bs/bs_xml.ml b/src-js/js_xml.ml
similarity index 90%
rename from src-bs/bs_xml.ml
rename to src-js/js_xml.ml
index a1684d4..fe6ee78 100644
--- a/src-bs/bs_xml.ml
+++ b/src-js/js_xml.ml
@@ -1,21 +1,21 @@
 module DOMParser = struct
   type t
 
-  external create : unit -> t = "DOMParser" [@@bs.new]
+  external create : unit -> t = "DOMParser" [@@mel.new]
 
   external parseFromString : t -> string -> string -> Dom.element
     = "parseFromString"
-    [@@bs.send]
+    [@@mel.send]
 
   external firstElementChildUnsafe : Dom.element -> Dom.element
     = "firstElementChild"
-    [@@bs.get]
+    [@@mel.get]
 
   external querySelector :
-    Dom.element -> string -> Dom.element Js.null_undefined = "querySelector"
-    [@@bs.send]
+    Dom.element -> string -> Dom.element Js.nullable = "querySelector"
+    [@@mel.send]
 
-  external textContent : Dom.element -> string = "textContent" [@@bs.get]
+  external textContent : Dom.element -> string = "textContent" [@@mel.get]
 
   let parse_xml text =
     let parser = create () in
@@ -30,13 +30,13 @@ end
 
 module Node = struct
   (* See https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType *)
-  external element_node : int = "ELEMENT_NODE" [@@bs.val] [@@bs.scope "Node"]
+  external element_node : int = "ELEMENT_NODE" [@@mel.scope "Node"]
 
-  external text_node : int = "TEXT_NODE" [@@bs.val] [@@bs.scope "Node"]
+  external text_node : int = "TEXT_NODE" [@@mel.scope "Node"]
 
-  external comment_node : int = "COMMENT_NODE" [@@bs.val] [@@bs.scope "Node"]
+  external comment_node : int = "COMMENT_NODE" [@@mel.scope "Node"]
 
-  external nodeType : Dom.node -> int = "nodeType" [@@bs.get]
+  external nodeType : Dom.node -> int = "nodeType" [@@mel.get]
 
   external of_element : Dom.element -> Dom.node = "%identity"
 
@@ -72,23 +72,23 @@ module Node_list = struct
 end
 
 module Text = struct
-  external data : Dom.text -> string = "data" [@@bs.get]
+  external data : Dom.text -> string = "data" [@@mel.get]
 end
 
 module Element = struct
-  external childNodes : Dom.element -> Dom.nodeList = "childNodes" [@@bs.get]
+  external childNodes : Dom.element -> Dom.nodeList = "childNodes" [@@mel.get]
 
   let child_nodes elt = childNodes elt |> Node_list.to_array |> Array.to_list
 
-  external tagName : Dom.element -> string = "tagName" [@@bs.get]
+  external tagName : Dom.element -> string = "tagName" [@@mel.get]
 
   external getAttribute : Dom.element -> string -> string Js.Nullable.t
     = "getAttribute"
-    [@@bs.send]
+    [@@mel.send]
 
   external getAttributeNames : Dom.element -> string Js.Array.t
     = "getAttributeNames"
-    [@@bs.send]
+    [@@mel.send]
 
   let get_attribute elt attr =
     let v = getAttribute elt attr in
@@ -96,28 +96,28 @@ module Element = struct
 
 
   external append : Dom.element -> Dom.node array -> unit = "append"
-    [@@bs.send] [@@variadic]
+    [@@mel.send] [@@mel.variadic]
 
   external setAttribute : Dom.element -> string -> string -> unit
     = "setAttribute"
-    [@@bs.send]
+    [@@mel.send]
 end
 
 module XMLSerializer = struct
   type t
 
-  external create : unit -> t = "XMLSerializer" [@@bs.new]
+  external create : unit -> t = "XMLSerializer" [@@mel.new]
 
   external serializeToString : t -> Dom.node -> string = "serializeToString"
-    [@@bs.send]
+    [@@mel.send]
 end
 
 module Document = struct
   external createElementNS : string -> string -> Dom.element = "createElementNS"
-    [@@val] [@@scope "window", "document"]
+    [@@mel.scope "window", "document"]
 
   external createTextNode : string -> Dom.text = "createTextNode"
-    [@@val] [@@scope "window", "document"]
+    [@@mel.scope "window", "document"]
 end
 
 module Encode = struct
diff --git a/src-bs/bs_xml.mli b/src-js/js_xml.mli
similarity index 100%
rename from src-bs/bs_xml.mli
rename to src-js/js_xml.mli
diff --git a/src-bs/shims_let_ops_.ml b/src-js/shims_let_ops_.ml
similarity index 100%
rename from src-bs/shims_let_ops_.ml
rename to src-js/shims_let_ops_.ml
diff --git a/src-bs/util.ml b/src-js/util.ml
similarity index 100%
rename from src-bs/util.ml
rename to src-js/util.ml
diff --git a/src-bs/util.mli b/src-js/util.mli
similarity index 100%
rename from src-bs/util.mli
rename to src-js/util.mli
diff --git a/src/dune b/src/dune
index e60d8a2..11ee2b6 100644
--- a/src/dune
+++ b/src/dune
@@ -1,7 +1,8 @@
 (library
  (name decoders)
  (flags :standard -warn-error -a+8)
- (public_name decoders))
+ (public_name decoders)
+ (modes :standard melange))
 
 (rule
  (targets shims_let_ops_.ml)