diff -rauN a/bootstrap/__init__.py b/bootstrap/__init__.py
--- a/bootstrap/__init__.py	2023-05-12 18:43:34.179377548 +0200
+++ b/bootstrap/__init__.py	2023-05-12 18:44:34.389465858 +0200
@@ -63,6 +63,11 @@
         EXTERNAL / 'pyproject-hooks' / 'src',
         {'pyproject_hooks'},
     ),
+    'packaging': Package(
+        EXTERNAL / 'packaging',
+        EXTERNAL / 'packaging' / 'src',
+        {'packaging'},
+    )
 }
 
 EXTRA_PATH = [str(package.module_path) for package in PACKAGES.values()]