From 1d2afc0e998abe2a1bb2c6b803ae9154717c3e24 Mon Sep 17 00:00:00 2001
From: Mutsuha Asada <me@momee.mt>
Date: Wed, 4 Jun 2025 07:51:23 +0900
Subject: [PATCH] ocamlPackages.wasm: 2.0.1 -> 2.0.2

---
 .../ocaml-modules/wasm/default.nix            | 77 ++++++++-----------
 1 file changed, 32 insertions(+), 45 deletions(-)

diff --git a/pkgs/development/ocaml-modules/wasm/default.nix b/pkgs/development/ocaml-modules/wasm/default.nix
index 1abe1f060bbd..5af0836ed2ca 100644
--- a/pkgs/development/ocaml-modules/wasm/default.nix
+++ b/pkgs/development/ocaml-modules/wasm/default.nix
@@ -1,55 +1,42 @@
 {
-  stdenv,
   lib,
+  stdenv,
   fetchFromGitHub,
-  ocaml,
-  findlib,
-  ocamlbuild,
+  menhir,
+  odoc,
+  buildDunePackage,
 }:
+buildDunePackage rec {
+  pname = "wasm";
+  version = "2.0.2";
 
-if lib.versionOlder ocaml.version "4.08" then
-  throw "wasm is not available for OCaml ${ocaml.version}"
-else
+  minimalOCamlVersion = "4.12";
 
-  stdenv.mkDerivation rec {
-    pname = "ocaml${ocaml.version}-wasm";
-    version = "2.0.1";
+  src = fetchFromGitHub {
+    owner = "WebAssembly";
+    repo = "spec";
+    tag = "opam-${version}";
+    hash = "sha256-RbVGW6laC3trP6IhtA2tLrAYVbx0Oucox9FgoEvs6LQ=";
+  };
 
-    src = fetchFromGitHub {
-      owner = "WebAssembly";
-      repo = "spec";
-      rev = "opam-${version}";
-      hash = "sha256-5eo8MIui2GxRS5X9az0NlLGZfxi5KGsTI/EaP6m/zts=";
-    };
+  postUnpack = ''
+    cd "$sourceRoot/interpreter"
+    export sourceRoot=$PWD
+  '';
 
-    nativeBuildInputs = [
-      ocaml
-      findlib
-      ocamlbuild
-    ];
-    strictDeps = true;
+  # x86_64-unknown-linux-musl-ld: -r and -pie may not be used together
+  hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";
 
-    # x86_64-unknown-linux-musl-ld: -r and -pie may not be used together
-    hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";
+  nativeBuildInputs = [
+    menhir
+    odoc
+  ];
 
-    makeFlags = [
-      "-C"
-      "interpreter"
-    ];
-
-    createFindlibDestdir = true;
-
-    postInstall = ''
-      mkdir $out/bin
-      cp -L interpreter/wasm $out/bin
-    '';
-
-    meta = {
-      description = "Executable and OCaml library to run, read and write Web Assembly (wasm) files and manipulate their AST";
-      mainProgram = "wasm";
-      license = lib.licenses.asl20;
-      maintainers = [ lib.maintainers.vbgl ];
-      homepage = "https://github.com/WebAssembly/spec/tree/master/interpreter";
-      inherit (ocaml.meta) platforms;
-    };
-  }
+  meta = {
+    description = "Library to read and write WebAssembly (Wasm) files and manipulate their AST";
+    mainProgram = "wasm";
+    license = lib.licenses.asl20;
+    maintainers = [ lib.maintainers.vbgl ];
+    homepage = "https://github.com/WebAssembly/spec/tree/main/interpreter";
+  };
+}