Composer hangs on "Resolving dependencies through SAT" on 4.2
<p>Things I've tried:</p>

<ul>
<li>Removing everything except for Laravel (version 4.2.*) - This completes but still hangs for around 5 minutes</li>
<li>Updating composer</li>
<li>Removing /vendor</li>
<li>Doing clean Laravel 4.2 install (hangs around 3 minutes)</li>
<li>Doing clean Laravel 5 install (doesn't hang at all)</li>
<li>Turning off xdebug completely (doesn't seem to make a difference)</li>
</ul>

<p>With all my packages, I've seen composer complete but only when I left it running overnight. I can't deploy to forge at all because it times out! This only started happening two or so weeks ago.</p>