diff --git a/pyodide/README.md b/pyodide/README.md
index c7ce24321d..fb2fde8253 100644
--- a/pyodide/README.md
+++ b/pyodide/README.md
@@ -28,8 +28,11 @@ since it's pure cmake without any additional moving parts.
 - clone IfcOpenShell repo next to it to `IfcOpenShell` folder
 - run `python nix/build-all.py -wasm -py-313` in `IfcOpenShell`
     - it will produce Python package in `IfcOpenShell/ifcopenshell`
-- run `pyodide build`
-    - it will produce a wheel in `IfcOpenShell/dist`
+- run `python pyodide/build-all-pack-wheel-local.py`, it will
+    - clean up previous wheels
+    - run `pyodide build`
+    - prepare standalone and modular wheels
+    - produce final wheels in `IfcOpenShell/dist` and `IfcOpenshell/dist-modular`
 - testing:
   - ensure you're in pyodide environment
   - `cd IfcOpenshell/pyodide`
diff --git a/pyodide/build-all-pack-wheel-local.py b/pyodide/build-all-pack-wheel-local.py
new file mode 100755
index 0000000000..f85268b1fa
--- /dev/null
+++ b/pyodide/build-all-pack-wheel-local.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+"""Intended to be run after nix/build-all.py has finished the wasm build."""
+import shutil
+import subprocess
+from pathlib import Path
+
+
+def get_repo_root() -> Path:
+    output = subprocess.check_output(["git", "rev-parse", "--show-toplevel"], text=True)
+    return Path(output.strip())
+
+
+def run(cmd: list[str], **kwargs) -> None:
+    print("$", " ".join(cmd))
+    subprocess.check_call(cmd, **kwargs)
+
+
+def main() -> None:
+    repo_root = get_repo_root()
+
+    shutil.rmtree(repo_root / "dist", ignore_errors=True)
+    shutil.rmtree(repo_root / "dist_modular", ignore_errors=True)
+    run(["pyodide", "build"], cwd=repo_root)
+    shutil.rmtree(repo_root / "ifcopenshell", ignore_errors=True)
+    (repo_root / "setup.py").unlink(missing_ok=True)
+    run(["git", "restore", "pyproject.toml"], cwd=repo_root)
+
+    wheel = next((repo_root / "dist").glob("ifcopenshell-*.whl"))
+
+    run(["uv", "run", "pyodide/order_pyodide_wheel_shared_objects.py", str(wheel)], cwd=repo_root)
+    run(
+        ["uv", "run", "pyodide/split_pyodide_ifcopenshell_wheel.py", str(wheel), "dist-modular/"],
+        cwd=repo_root,
+    )
+
+
+if __name__ == "__main__":
+    main()