diff --git a/.gitignore b/.gitignore
index 4023bc34..0c00c4c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,7 @@ __pycache__/
 
 # Claude Code project instructions — local to each dev box, not part of the repo.
 CLAUDE.md
+
+# Local flatpak-builder output (build-flatpak.sh) — ostree repo + build dir at the repo root.
+.flatpak-repo/
+.flatpak-build/