diff --git a/modules.env b/modules.env
index 9be977147a..d9e1a476aa 100644
--- a/modules.env
+++ b/modules.env
@@ -35,6 +35,9 @@
 # - our intent was not to limit it's use and it should be Apache
 # licensed
 SOURCE_MODULES["https://git.openstack.org/openstack-infra/puppet-vcsrepo"]="0.0.8"
+# NOTE(yolanda): please note that grafana depends on camptocamp-archive. This is a
+# potential conflict with puppet-community/puppet-archive. So we cannot
+# rely on using any feature on grafana that relies on archive
 SOURCE_MODULES["https://github.com/bfraser/puppet-grafana"]="c51f03df3b41755bf3968c978d80b3fc94138652"
 SOURCE_MODULES["https://github.com/biemond/biemond-wildfly"]="v0.2.4"
 SOURCE_MODULES["https://github.com/maestrodev/puppet-wget"]="v1.6.0"