diff --git a/_posts/2024-08-10-fast-ci-build-with-nix.md b/_posts/2024-08-10-fast-ci-build-with-nix.md
index 010c806..e1f1aa1 100644
--- a/_posts/2024-08-10-fast-ci-build-with-nix.md
+++ b/_posts/2024-08-10-fast-ci-build-with-nix.md
@@ -105,6 +105,8 @@ volumes:
   nix:
 ```
 
+Note that the volume is named `woodpeck_nix` and not `nix` in the woodpacker agent configuration (`WOODPECKER_BACKEND_DOCKER_VOLUMES` environment declaration). It's because our `docker-compose.yml` is in a `woodpecker` folder and docker compose prefixes the created volumes with the name of the deployment, by default the parent folder name. The prefix is not needed elsewhere, as elsewhere, the resolution is dynamically done by compose. But the `WOODPECKER_BACKEND_DOCKER_VOLUMES` declaration is not part of compose, it will be used later by woodpecker when interacting directly with the Docker API.
+
 Then, in your project `.woodpecker.yml`, you can seemlessly use nix and enjoy efficient and quick caching:
 
 ```yml