How does a minimum build configuration for dojo look like?

I studied the build tutorial, found the web build (1.7.2 only), and tested several examples - however, I could not find an easy explanation of the build system.

Let's say my app is a single web page:

<script src="./js/App/other_non_amd_stuff_working_independently.js">
<script src="./js/lib/dojo/dojo.js" data-dojo-config="async: true"></script>
<script src="./js/App/Main.js">

The Dojo SDK is in ./lib/, Main.js contains the Dojo config + app boot:

require({
    packages:[{
        name:"App",
        location:"../../App"
    }]
},  
[ "dojo/query",
  "dijit/layout/BorderContainer", 
  "App/Foo",
  "dojo/domReady!"], function(query, BorderContainer, Foo) { ... });

My question now is as simple as this: How can I create one single script file out of all my Dojo/AMD stuff? I just want to replace

<script src="./js/lib/dojo/dojo.js" data-dojo-config="async: true"></script>
<script src="./js/App/Main.js">

with a single

<script src="./js/Main.minified.js">

Getting the build system to work on this seems somewhat non-trivial. It either trys to convert all files in ./App/ to AMD modules (that's not what I want .. yet) or fails to find App/Main. I tried building a build profile (app.profile.js), but I don't get the point of this except that it's adding (IMO unnecessary) complexity. How can I make the build system just concatenate my App/Main.js incl. dependencies ?

Any hints for better tutorials on understanding the build system are appreciated, too.