diff --git a/tox.ini b/tox.ini
index 89e2e07..5fb64a7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,8 +10,8 @@ skip_missing_interpreters=true
 # - E302: expected 2 blank lines, found 1
 # - W504: line break after binary operator
 ignore = E126,E261,E302,W504
-# Don't lint setup.py or the .tox virtualenv directory.
-exclude = setup.py,.tox
+# Don't lint setup.py, the .tox virtualenv directory, or the build directory
+exclude = setup.py,.tox,build
 
 [testenv]
 deps = -rtox_deps.txt