Git ignore top level build* directories
diff --git a/.gitignore b/.gitignore
index 6d2484b..5984c52 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 # External/*
 /test-suite-externals
 *.pyc
+/build*
\ No newline at end of file