title: "Unable to find version" during TFS Build 2015 when restoring NuGet packages
body: <p>I'm having troubles with NuGet package restoring during a TFS Build 2015.</p>
  
  <p>Since some packages require NuGet 3.x client, I've configured the new scriptable build to use a custom NuGet location where I've placed the executable of <em>NuGet Command-Line 3.x beta</em>.</p>
  
  <p>Whenever I run a build, all packages can't be restored and NuGet throws the <em>"Unable to find version..."</em> error:</p>
  
  <pre><code>Unable to find version '1.1.10' of package 'Microsoft.Bcl'.
  Unable to find version '4.0.10' of package 'System.Threading'.
  Unable to find version '1.1.37' of package 'System.Collections.Immutable'.
  Unable to find version '1.0.0' of package 'Owin'.
  Unable to find version '4.1.0' of package 'NLog'.
  Unable to find version '7.0.1' of package 'Newtonsoft.Json'.
  Unable to find version '2.0.1' of package 'MongoDB.Driver.Core'.
  Unable to find version '2.0.1' of package 'MongoDB.Driver'.
  Unable to find version '2.0.1' of package 'MongoDB.Bson'.
  Unable to find version '3.0.1' of package 'Microsoft.Owin.Security.OAuth'.
  </code></pre>
  
  <p>...and even more packages. I believe the issue is clear.</p>
  
  <p>When I  build the same solution in the build machine using Visual Studio, all packages are restored sucessfully.</p>
  
  <p>How do I solve this?</p>