diff --git a/.gitignore b/.gitignore
index 6330f5b8b5..87103883b0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,5 +54,6 @@ build*/
 target*/
 contrib-*
 install-*
+!buildsystem/
 !build.rs
 !extras/package/apple/build.sh