anchor.diff:  Use `source` to set them for the current shell:
   
   <pre class="terminal">
  -~/deployments/cf-example$ source bosh_environment
  +$ source bosh_environment
   </pre>
   
   Run the `bosh aws create` command to generate the receipt files that you use
  
positive.code: create an NS record in the DNS server for *mydomain.com*
  for each address in the delegation set.
  
  #### <a id='domain-prep'></a> Prepare a Domain ####
  
  Next, set environment variables required for deploying to AWS. Create
  a file called `bosh_environment` and add the following, changing the
  
negative.code: </pre>
  
  Create a directory for your planned deployment.
  `cd` into that directory, which is where all the commands in this topic
  should be run.
  
  1. Create a file named `Gemfile` with the following contents:
  
  	<pre class="terminal">
  	source 'https://rubygems.org'
  
  	ruby "1.9.3"
  
  	gem "bosh_cli_plugin_aws"
  	</pre>
  
  1. Run the `bundle install` command.
  
  ### <a id='domain-prep'></a> Prepare a domain ###
  
  First, pick a DNS domain name for the environment you plan to deploy.
  If you pick *cloud.mydomain.com*, your applications become available as
  