diff --git a/setup.cfg b/setup.cfg
index b284ad0..6ec67e8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,7 +1,7 @@
 [flake8]
 # E203: whitespaces before ':' <https://github.com/psf/black/issues/315>
 # E231: missing whitespace after ','
 # W503: line break before binary operator <https://github.com/psf/black/issues/52>
 ignore = E203,E231,W503
 max-line-length = 88
-exclude = swh/loader/cvs/rcsparse, swh/loader/cvs/cvs2gitdump
+exclude = build, swh/loader/cvs/rcsparse, swh/loader/cvs/cvs2gitdump