title: How to disable implicit building in packages? {$IMPLICITBUILD}
body: <p>I'm working on a couple of custom packages (containing GUI components mostly) for a Delphi XE2 application. I need the <a href="http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/devcommon/compdirsimplicitbuild_xml.html" rel="nofollow noreferrer">$IMPLICITBUILD</a> directive to be off. I've edited the package .BPL file manually to set <code>{$IMPLICITBUILD OFF}</code> but the Delphi IDE occasionally reverts the directive to <code>{$IMPLICITBUILD ON}</code>. I'm guessing manually editing the .BPL file is not the correct approach. How should I set $IMPLICITBUILD so that it stays off? </p>
  
  <p>I've googled but can't find anything, nor can I see anything when poking around the Delphi IDE. </p>