diff --git a/pkgs/development/python-modules/webidl/default.nix b/pkgs/development/python-modules/webidl/default.nix
new file mode 100644
index 000000000000..699bc6ec6f86
--- /dev/null
+++ b/pkgs/development/python-modules/webidl/default.nix
@@ -0,0 +1,44 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitLab,
+  setuptools,
+  ply,
+}:
+
+buildPythonPackage rec {
+  pname = "webidl";
+  version = "0-unstable-2025-06-15";
+  pyproject = true;
+
+  src = fetchFromGitLab {
+    owner = "verso-browser";
+    repo = "verso";
+    rev = "ace264e0e73da37bfb14818d92f0e54946ce9871";
+    hash = "sha256-gjg7qs2ik1cJcE6OTGN4KdljqJDGokCo4JdR+KopMJw=";
+  };
+
+  # python library is vendored inside another repo
+  # and unfortunately not exposed in another repo
+  # or Pypi.
+  sourceRoot = "${src.name}/third_party/WebIDL";
+
+  build-system = [ setuptools ];
+
+  dependencies = [ ply ];
+
+  pythonImportsCheck = [
+    "WebIDL"
+  ];
+
+  # no pytests exist
+  doCheck = false;
+
+  meta = {
+    description = "WebIDL parser written in Python";
+    homepage = "https://gitlab.com/verso-browser/verso";
+    license = lib.licenses.mpl20;
+    maintainers = with lib.maintainers; [ ethancedwards8 ];
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 660922c1f2f8..b7186e048229 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -19305,6 +19305,8 @@ self: super: with self; {
 
   webexteamssdk = callPackage ../development/python-modules/webexteamssdk { };
 
+  webidl = callPackage ../development/python-modules/webidl { };
+
   weblate-language-data = callPackage ../development/python-modules/weblate-language-data { };
 
   weblate-schemas = callPackage ../development/python-modules/weblate-schemas { };