diff --git a/.gitignore b/.gitignore
index 7001c4ab..3fc7378e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ doc/source/results/*/announce_tc.rst
 doc/source/results/*/ptl.rst
 doc/source/results/*/tc.rst
 rolls
+build