diff --git a/sections/advanced.md b/sections/advanced.md
index 1dab84d9..d67f60d0 100644
--- a/sections/advanced.md
+++ b/sections/advanced.md
@@ -742,6 +742,9 @@ my_job:
       - ${PRE_COMMIT_HOME}
 ```
 
+pre-commit's cache requires to be served from a constant location between the different builds. This isn't the default when using k8s runners
+on GitLab. In case you face the error `InvalidManifestError`, set `builds_dir` to something static e.g `builds_dir = "/builds"` in your `[[runner]]` config
+
 ### travis-ci example
 
 ```yaml