diff --git a/python-furo.changes b/python-furo.changes
index 4701ad4..545cadf 100644
--- a/python-furo.changes
+++ b/python-furo.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Nov 14 11:32:54 UTC 2024 - Matej Cepl <mcepl@cepl.eu>
+
+- Add prepare_vendor.sh as Source99.
+
 -------------------------------------------------------------------
 Tue Nov  5 21:23:06 UTC 2024 - Matej Cepl <mcepl@cepl.eu>
 
diff --git a/python-furo.spec b/python-furo.spec
index 4bae01c..4b36866 100644
--- a/python-furo.spec
+++ b/python-furo.spec
@@ -51,6 +51,8 @@ Source0:        https://files.pythonhosted.org/packages/source/f/furo/furo-%{ver
 # Source1 and Source2 created with ./prepare_vendor.sh
 Source1:        furo-%{version}-vendor.tar.xz
 Source2:        furo-%{version}-vendor-licenses.txt
+# Run without any arguments from this directory with the fresh Source0
+Source99:       prepare_vendor.sh
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module doc}
 BuildRequires:  %{python_module myst-parser}
@@ -140,7 +142,6 @@ rm -rf html/{.buildinfo,.doctrees}
 
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
-
 %check
 # The tests require web access.  If any tests show up that can be run without a
 # network, do this: