Missing Assembly Reference on Build

[tall kelp]

The package has two assemblies, one runtime and one editor, and includes precompiled binaries for difference platforms that the assemblies reference.

The assembly definitions and managed assemblies all use the same conditional script define to get included (I use this to make sure platform specific code only gets included with the correct platform).

This is the setup of the runtime assembly definition. Cut off, windows is also selected. There are no version defines

These are the settings on the managed assembly that doesn't get included in a build, but works in editor.