Why is package manager ignoring the settings in the nuspec file

Question

From my understand the nuspec file this should not be adding anything from the plugins folder, but all the files are still being added. I just want them in the pack, and not added to the project.

This is the file

<?xml version="1.0"?>
<package>
  <metadata>
    <id>test</id>
    <version>4.9.0</version>
    <title>test</title>
    <authors>test</authors>
    <description>test</description>
    <releaseNotes>
    </releaseNotes>
    <contentFiles>
      <files include="**" exclude="plugins/**" buildAction="None" copyToOutput="false" />
    </contentFiles>
  </metadata>
  <files>
    <file src="view\**" target="content\plugins\test\view" />
    <file src="readmes\**" target="content\plugins\test\readmes" />
    <file src="content\**" target="content\Themes\Default\test" />
  </files>
</package>

what am I missing? thanks

I've tried what is there, and about 50 different variations to figure this out.

Thanks