title: NuGet Enable Package Restore with TFS
body: <p>I have enabled "Package Restore", into our builds, to which we have a nightly build to ensure everything builds correctly.</p>
  
  <p>We are getting package errors on our build machine, but not on our local machines.</p>
  
  <p>The error is:</p>
  
  <pre><code>nuget.targets (43): Unable to find version (2.5.1) Castle.Core
  </code></pre>
  
  <p>I would assume the version are package are irrelevant, but I've added for context.</p>
  
  <p>Any thoughts?</p>
  
  <p>Package Config:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;packages&gt;
    &lt;package id="Castle.Core" version="2.5.2" /&gt;
    &lt;package id="FluentNHibernate" version="1.2.0.712" /&gt;
    &lt;package id="Iesi.Collections" version="3.1.0.4000" /&gt;
    &lt;package id="NHibernate" version="3.1.0.4000" /&gt;
    &lt;package id="NHibernate.Castle" version="3.1.0.4000" /&gt;
  &lt;/packages&gt;
  </code></pre>