title: Xcode build setting "Build Products Path" (CONFIGURATION_BUILD_DIR) is a lie?
body: <p>If I create a new application project, the build settings look something like this:</p>
  
  <p><img src="https://i.stack.imgur.com/zRt6G.png" alt="enter image description here"></p>
  
  <p>It claims to be using a build dir <code>build/Debug-iphoneos</code>. I assume this is relative to the project directory? In reality, the project is compiled to the "derived data" directory, under <code>~/Library/Developer/Xcode/DerivedData/CryptoTest2-abc...</code>  </p>
  
  <p>So what is going on here? Is this build setting simply ignored? What is the build setting that controls the output directory? </p>