Fix installation bugs

Change-Id: I15fc3f027f548acea6026f16c83568fffcae71ba
diff --git a/.gitignore b/.gitignore
index 832d443..743e2b0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 docs
 todo.org
 tools
+build
 fixtures.txt
 node_modules
 log