diff --git a/.gitignore b/.gitignore
index d92f048..d7f88cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,5 +4,8 @@
 *~
 .DS_Store
 
+# Docker buildx state (created by 'docker compose build')
+.docker/
+
 # Personal cloud-init overrides (not shared)
 deploy/my-cloud-init.yml