title: Specify a directory as package source
body: <p>I'm trying to add the .nuget directory as a package source, because we dont have a remote feed and we just had the need for one. I'm modifying the Nuget.targets file like this:</p>
  
  <pre><code>&lt;ItemGroup Condition=" '$(PackageSources)' == '' "&gt;
      &lt;!-- Package sources used to restore packages. By default, registered sources under %APPDATA%\NuGet\NuGet.Config will be used --&gt;
      &lt;!-- The official NuGet package source (https://nuget.org/api/v2/) will be excluded if package sources are specified and it does not appear in the list --&gt;
      &lt;!--   --&gt;
      &lt;PackageSource Include="https://nuget.org/api/v2/" /&gt;
      &lt;PackageSource Include="../.nuget" /&gt;
  
    &lt;/ItemGroup&gt;
  </code></pre>
  
  <p>However I get a message when building the project that says "Invalid URI cannot determine the format".</p>
  
  <p>Is there a way to add a local folder for packages restore?</p>