diff --git a/run_tests.sh b/run_tests.sh
index a3a74cdcf..a42d0d3d6 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -103,7 +103,8 @@ function copy_subunit_log {
 
 function run_pep8 {
   echo "Running pep8 ..."
-  srcfiles="--exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg ."
+  srcfiles="--exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*"
+  srcfiles+=",*egg,build ."
   # Just run PEP8 in current environment
   #
   ignore="--ignore=E12,E711,E721,E712"
diff --git a/tox.ini b/tox.ini
index 4d5dbdcb1..e4458844a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ commands = python setup.py testr --testr-args='{posargs}'
 deps = pep8==1.3.3
 commands =
   pep8 --ignore=E12,E711,E721,E712 --show-source \
-    --exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg .
+    --exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build .
 
 [testenv:venv]
 commands = {posargs}