diff --git a/.gitignore b/.gitignore
index 75669608..c66e936c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,7 +40,7 @@ user.bazelrc
 .ruff_cache
 
 # docs:incremental and docs:ide_support build artifacts
-/_build
+_build
 
 # Vale - editorial style guide
 .vale.ini
@@ -58,3 +58,4 @@ __pycache__/
 .cache/*
 compile_commands.json
 rust-project.json
+ubproject.toml