Can not find compilation library location for package

Hi,

I have created a nuget package via pack command and pushed the package to intrernal nuget server. 

So far so good. I add a reference in my other project to the package by "Manage nuget packages". It adds to Project.json smoothly and nice.

When I start debug on project I get the following error:

Can not find compilation library location for package  {package name}

ResolveReferencePaths

 Well, if I look at the path of the package in properties in vs the path is fine... 

Any help is appreciated :)

Thanks in advance