diff --git a/nixpacks.toml b/nixpacks.toml
new file mode 100644
index 000000000..f9a29df05
--- /dev/null
+++ b/nixpacks.toml
@@ -0,0 +1,7 @@
+# Nixpacks config — use the repository's own, known-good Dockerfile
+# (Chatwoot's docker/Dockerfile builds ruby:3.4.4-alpine + node + pnpm +
+# bundle install + assets:precompile) instead of Nixpacks' auto-generated
+# stack which installs Ruby via rbenv and fails.
+[build]
+provider = "dockerfile"
+dockerfile = "docker/Dockerfile"