--- a/docs/INSTALL.txt
+++ b/docs/INSTALL.txt
@@ -186,6 +186,18 @@ you can place include that file in your apache.conf/httpd.conf. We
 prefer the former. In other systems there are similar ways to accomplish
 this. Consult your OS's documentation if unsure.
 
+The Aegir install script will create the needed configuration directories if
+they do not exist, but will spit out warnings. To avoid these, you will need to
+create the following directory structure:
+/var/aegir/backups/
+/var/aegir/config/
+/var/aegir/config/includes/
+/var/aegir/config/server_master/
+/var/aegir/config/server_master/apache/
+/var/aegir/config/server_master/apache/conf.d/
+/var/aegir/config/server_master/apache/platform.d/
+/var/aegir/config/server_master/apache/vhost.d/
+
 If you are on a Debian-based system, you will also need to enable the 
 mod_rewrite module manually.