diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 2e3a20f5a..905f975e8 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -1,11 +1,16 @@
 <!--
 
-Please PLEASE search for existing issues before creating a new one!!
-
-This also applies for the error message
+If you are encountering the error
 
   element xref: validity error : IDREF attribute linkend references an unknown ID "opt-home.file._name__.source"
 
+then it means that you are using an old version of Home Manager, such
+as the release-20.03 branch, with a recent version of Nixpkgs, such as
+version 20.09 or master. See https://git.io/JTb6K for more.
+
+In general, please check if there already exists a relevant issue
+before creating a new one.
+
 -->
 
 ### Issue description