diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 533a7e6133..7e4ffab4d1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,2 +1,15 @@
+#
+# This is the GitLab CI configuration file for the mainstream QEMU
+# project: https://gitlab.com/qemu-project/qemu/-/pipelines
+#
+# !!! DO NOT ADD ANY NEW CONFIGURATION TO THIS FILE !!!
+#
+# Only documentation or comments is accepted.
+#
+# To use a different set of jobs than the mainstream QEMU project,
+# you need to set the location of your custom yml file at "custom CI/CD
+# configuration path", on your GitLab CI namespace:
+# https://docs.gitlab.com/ee/ci/pipelines/settings.html#custom-cicd-configuration-path
+#
 include:
   - local: '/.gitlab-ci.d/qemu-project.yml'