Appveyor out of heap space, Error C1060
<p>I'm getting failed builds on Appveyor from running out of heap space: <em>Error C1060</em> </p>

<p>Trying to enable the 64-bit toolset as described here:</p>

<p><a href="https://msdn.microsoft.com/en-us/library/x4d2c09s.aspx" rel="nofollow">https://msdn.microsoft.com/en-us/library/x4d2c09s.aspx</a></p>

<p>by adding the following to the top of my build script:</p>

<pre><code>- cd "\Program Files (x86)\Microsoft Visual Studio 14.0\VC"
- .\vcvarsall.bat amd64
</code></pre>

<p>However, <em>vcvarsall</em> is unrecognized...</p>

<p>Any other suggestions to not run out of heap space? I also tried using the <em>/Zm</em> option...</p>