One or more packages are incompatible with .NETStandard,Version=v1.5
<p>I created a new .NET Core Class Library and added a Nuget package from an internal company Nuget server. I began getting the following error:</p>

<blockquote>
  <p>Package XXXX is not compatible with netstandard1.5
  (.NETStandard,Version=v1.5). Package XXXX 
  1.0 supports: net45 (.NETFramework,Version=v4.5) One or more packages are incompatible with .NETStandard,Version=v1.5.</p>
</blockquote>

<p>I updated the project.json file to look like this but the same error persists.</p>

<pre><code>{
  "version": "1.0.0-*",

  "dependencies": {
    "XXXXX": "1.0.0",
    "NETStandard.Library": "1.5.0-rc2-24027"
  },

  "frameworks": {
    "netstandard1.5": {
      "imports": [
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  }
}
</code></pre>

<p>Does anyone have insight on this?</p>