diff --git a/.gitignore b/.gitignore
index 238475c..078916f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.eggs
 *.egg-info
 *.log
 *.py[co]
@@ -18,3 +19,5 @@ parts
 var
 ops.cfg
 venv
+AccessControl-4.4/
+zope.container-4.5.0/
diff --git a/README.md b/README.md
index a7b080f..49bb8c2 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,10 @@ Do the following:
 ```console
 python3.8 -m venv venv
 venv/bin/pip install --upgrade pip build wheel zc.buildout setuptools==42.0.2 numpy==1.23.4
+cd AccessControl-4.4  # Specially modified setup.py here
+../venv/bin/python setup.py install
+cd ..
+venv/bin/pip install RestrictedPython==5.4  # Override one from AccessControl-4.4
 venv/bin/buildout -c dev.cfg
 ```