Nuget add unmanaged files - nuget

Question

I'm using the following *.targets file to add build actions
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<None Include="$(MSBuildThisFileDirectory)\libeay32.dll">
<Link>libeay32.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\COMAssinaDocs.dll">
<Link>COMAssinaDocs.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\InterOps.ComAssinaDocs.dll">
<Link>InterOps.ComAssinaDocs.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\ssleay32.dll">
<Link>ssleay32.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>
and this is the nuspec:
<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
<metadata>
<id>xxx.Providers.SignDocs</id>
</metadata>
<files>
<file src="bin\Release\xxx.Providers.SignDocs.targets" target="build" />
<file src="bin\Release\xxx.Providers.SignDocs.dll" target="lib\net45" />
<file src="bin\Release\xxx.Providers.SignDocs.Impl.dll" target="lib\net45" />
</files>
</package>
And I'm using this piece of nuget documentation to build this package:
Including MSBuild props and targets in a package
Basically what I want is to get a few unmanaged dlls copied to the output folder of the project using the package and even tho I am following the instructions the target project file targets setion iss not added and therefore the files are not copied to the output directory. What am I missing?
UPDATE
Was able to get it working using the configurations bellow.
xxx.Providers.SignDocs.targets
<None Include="$(MSBuildThisFileDirectory)\libeay32.dll">
<Link>libeay32.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\COMAssinaDocs.dll">
<Link>COMAssinaDocs.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\InterOps.ComAssinaDocs.dll">
<Link>InterOps.ComAssinaDocs.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Include="$(MSBuildThisFileDirectory)\ssleay32.dll">
<Link>ssleay32.dll</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
<metadata>
<id>xxx.Providers.SignDocs</id>
</metadata>
<files>
<file src="..\..\tools\libeay32.dll" target="build" />
<file src="..\..\tools\COMAssinaDocs.dll" target="build" />
<file src="..\..\tools\InterOps.ComAssinaDocs.dll" target="build" />
<file src="..\..\tools\ssleay32.dll" target="build" />
<file src="bin\Release\xxx.Providers.SignDocs.targets" target="build" />
<file src="bin\Release\xxx.Providers.SignDocs.dll" target="lib\net45" />
<file src="bin\Release\xxx.Providers.SignDocs.Impl.dll" target="lib\net45" />
</files>
</package>

Answer 1

The targets file needs to be included in the 'package/files' element of the nuspec file, otherwise it isn't included in the package. It needs a target of 'build'.
The targets file also needs to be named the same as the package.