Problem with Plugininterfaces & SlimDX Nuget packages

I can’t get the references to VVVV.Plugininterfaces and VVVV.SlimDX working using the NuGet packages with Visual Studio 2015 (Community edition)

Not sure if it’s something with the configuration (.Net version and x86/x64/AnyCPU) or the .targets files of those packages.

Trying to use them in an F# solution but also get the same problem if I create one for C#

Any ideas?

Update: Ok, it seems to work if switching the configuration to x86/x64 and building. Before building exclamation marks are shown for the reference but when building it will be fixed. Any CPU won’t work though.