diff --git a/.flake8 b/.flake8
index becfd6dbb6..dd3cc20661 100644
--- a/.flake8
+++ b/.flake8
@@ -4,8 +4,10 @@ max-line-length = 88
 # jaraco/skeleton#34
 max-complexity = 10
 
-exclude =
+extend-exclude =
+	build
 	setuptools/_vendor
+	setuptools/_distutils
 	pkg_resources/_vendor
 
 extend-ignore =