MSBuild Macro for NuGet package directory

You can use an alternative method that create a NuGet.Config file in the root of the \Solutions\ folder to set the package repositoryPath of VS 2017 RC, add to NuGet.Config the following:

<?xml version="1.0" encoding="utf-8"?>
<configuration>  
  <config>
    <add key="repositoryPath" value="$\..\Packages" />
  </config>
</configuration>

For the repositoryPath setting, you can specify an absolute path or relative path (recommended) using the $ token. The $ token is based on where the NuGet.Config is located. In this case, you package will install in $(SolutionDir)packages\ folder, you can used $(SolutionDir)packages\MyPackage for Visual Studio 2017 RC. It`s also maintain compatibility with VS2012.

The $(NuGetPackageRoot) macro points to the package root.