diff --git a/.gitignore b/.gitignore
index b7f7b45..b3a5920 100644
--- a/.gitignore
+++ b/.gitignore
@@ -285,6 +285,7 @@
 /lib/rs/test/src/ultimate.rs
 /lib/rs/*.iml
 /lib/rs/**/*.iml
+/lib/swift/.build
 /libtool
 /ltmain.sh
 /missing