Loading of custom addin ends in error CS1704

I have a custom addin package that depends on Cake.Common. When I import it, I get the following error:

Error: error CS1704: An assembly with the same simple name 'Cake.Common' has already been imported. Try removing one of the references (e.g. 'D:\git\dev-tools\Cake\tools\Cake\Cake.Common.dll') or sign them to enable side-by-side

I’m adding it using this directive (it comes from a private package source in VSTS):

#addin nuget:https://[myaccount].pkgs.visualstudio.com/_packaging/Cake.ReleaseTools/nuget/v3/index.json?package=Cake.ReleaseTools&version=0.0.6

And this is the .nuspec in the package:

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
  <metadata>
    <id>Cake.ReleaseTools</id>
    <version>0.0.6</version>
    <title>Cake.ReleaseTools</title>
    <authors>My name</authors>
    <owners>My company</owners>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <licenseUrl>https://someurl.com/</licenseUrl>
    <projectUrl>https://someurl.com/</projectUrl>
    <description>A Cake addin with utilities to release software</description>
    <releaseNotes></releaseNotes>
    <language>en-US</language>
    <tags>cake build release script</tags>
    <dependencies>
      <dependency id="Newtonsoft.Json" version="9.0.1" />
    </dependencies>
  </metadata>
</package>

What am I doing wrong?

[fleed]

I need to cleanup some sensitive information, but I’ll try to

[pascalberger]

Closing due to inactivity. If this is still an issue with current version of Cake please reopen the issue.