diff --git a/build_docs.py b/build_docs.py
index 9e6804c..1c11a2a 100755
--- a/build_docs.py
+++ b/build_docs.py
@@ -786,6 +786,7 @@ def build_venv(self):
             + [self.theme]
             + self.version.requirements
         )
+        run([venv_path / "bin" / "python", "-m", "pip", "freeze", "--all"])
         self.venv = venv_path
 
     def copy_build_to_webroot(self):