diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -36,8 +36,8 @@
                 "(^contrib/apple-sdk-tools/)"
             ],
             "flags": [
-                "--ignore=E303,E305,E501,E704,W503,W504",
-                "--require-plugins=flake8-comprehensions"
+                "--ignore=A001,A003,E303,E305,E501,E704,W503,W504",
+                "--require-plugins=flake8-comprehensions,flake8-builtins"
             ]
         },
         "lint-format-strings": {
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -135,7 +135,7 @@
 Install all the code formatting tools on Debian Bullseye (11) or Ubuntu 20.04:
 ```
 sudo apt-get install python3-autopep8 python3-pip php-codesniffer shellcheck yamllint
-pip3 install "isort>=5.6.4" "mypy>=0.910" "flynt>=0.78" "flake8>=5" flake8-comprehensions
+pip3 install "isort>=5.6.4" "mypy>=0.910" "flynt>=0.78" "flake8>=5" flake8-comprehensions flake8-builtins
 echo "export PATH=\"`python3 -m site --user-base`/bin:\$PATH\"" >> ~/.bashrc
 source ~/.bashrc
 ```