Change nuget package content folder

I am not sure I have the terms quite right here, so give me some rope.

I have a class library project which when built with release config, generates a nuget package on build via the setting under project properties.

When I look at the package using nuget package explorer, the contents looks like this:

This makes sense, it matches the build folders output.

However what I am trying to achieve is changing that output to be lib\net462\plugins\dll.

Any ideas on the easiest way to achieve this? I cannot see any options for configuring the contents output on the package.