diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 64b23a9d..6283d2aa 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -58,6 +58,8 @@ jobs:
             --non-interactive \
             PYODIDE_PACKAGES="aiohttp,basemap,cdsapi,cfgrib,cf-units,cmcrameri,dask,earthkit,ecmwf-api-client,ecmwf-opendata,field-compression-benchmark,fsspec,git2,gribscan,h5netcdf,intake,ipyfilite,ipython,kerchunk,lzma,matplotlib,MetPy,netcdf4,numcodecs,numpy,pandas,pint,proplot,requests,scipy,sympy,s3fs,xarray,xeofs,zarr" \
             make
+      - name: Extract the requirements.txt file
+        run: python3 tools/requirements.txt
       - name: Clean up the pyodide build
         run: |
           cd pyodide
diff --git a/.gitignore b/.gitignore
index 5522b620..016b9252 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 /.cache
 /dist
 /static/pyodide
+/files/requirements.txt
 /.jupyterlite.doit.db
 
 __pycache__/
diff --git a/tools/requirements.py b/tools/requirements.py
new file mode 100644
index 00000000..0f10dcb8
--- /dev/null
+++ b/tools/requirements.py
@@ -0,0 +1,55 @@
+import json
+from pathlib import Path
+
+lock_path = Path("pyodide") / "dist" / "pyodide-lock.json"
+requirements_path = Path("files") / "requirements.txt"
+
+with lock_path.open("rb") as f:
+    lock = json.load(f)
+
+python = lock["info"]["python"]
+pyodide = lock["info"]["version"]
+
+packages = dict()
+
+IGNORE_PACKAGES = []
+
+for package in lock["packages"].values():
+    if package["package_type"] != "package":
+        continue
+    if Path(package["file_name"]).suffix != ".whl":
+        continue
+    if package["install_dir"] != "site":
+        continue
+
+    if package["name"] in IGNORE_PACKAGES:
+        continue
+
+    packages[package["name"]] = package["version"]
+
+with requirements_path.open("w") as f:
+    f.write(
+        "# "
+        + " Online Laboratory for Climate Science and Meteorology ".center(76, "=")
+        + " #\n"
+    )
+    f.write("# " + " requirements.txt (automatically generated) ".center(76) + " #\n")
+    f.write("# " + "".center(76) + " #\n")
+    f.write(
+        "# "
+        + " Please note that this list is currently only an approximation ".center(76)
+        + " #\n"
+    )
+    f.write(
+        "# "
+        + " and does not include e.g. shared library dependencies ".center(76)
+        + " #\n"
+    )
+    f.write("# " + "".center(76, "=") + " #\n")
+    f.write("\n")
+    f.write(f"# python == {python}\n")
+    f.write(f"# pyodide == {pyodide}\n")
+    f.write("\n")
+
+    for name, version in sorted(packages.items()):
+        f.write(f"{name} == {version}\n")