README.md in simple_provision-0.99.10 vs README.md in simple_provision-0.99.11

- old
+ new

@@ -85,10 +85,11 @@
   - scripts/ruby.sh
   - scripts/rubygems.sh
   - scripts/redis.sh
 env:
   DBNAME: my_db_name
+  REDISNAME: <%= ENV["REDIS_NAME"] %>
   WEBROOT: /var/www/app
 ```
 
 File declared in files and scripts can point to anywhere in the machine
 from which you make the provision. The file path is calculated relative
@@ -96,9 +97,12 @@
 provisioned server at ~/files and ~/scripts
 
 ### Passing variables to scripts
 Variables defined in `env` will be exposed to scripts during execution.
 That way you can re-use the same scripts for different type of servers.
+You can pass environment variables (available through the use of bash `export ENVNAME=value`
+or passing to `simpro` command such as `ENVNAME=value simpro`) to the
+env section using the ERB syntax (`<%= ENV['ENVNAME'] %>`).
 
 ## Provision your server
 `bundle exec simpro my-awesome-server root@my-host`
 
 ## Contributing