diff --git a/README.md b/README.md
index 3d91011..36c02a5 100644
--- a/README.md
+++ b/README.md
@@ -36,12 +36,12 @@ git push -u origin build-<module>
 
 New to git? Start here: https://git-scm.com/doc
 
-## Building on Ra
+## Building on Ra - DO NOT write into /var/tmp !
 
 `<Module>` below is one of the top-level directories of the cloned repo
 (e.g. `/das/work/p21/p21515/MX_Pmodule/ccp4`):
 
-**WARNING: never write big files to `/var/tmp` — it is small and shared with
+> **!!!WARNING!!!: never write big files to `/var/tmp` — it is small and shared with
 everyone on the login node. Please, please do not fill /var/tmp.**
 
 Always pass `--tmpdir` and `--distdir` pointing to your p-group work folder —