Unity3D on Ubuntu unable to resolve .dll dependencies

I have a project that builds without issue on Windows 10 via command line:

I am trying to perform the same build on a headless Ubuntu machine:

The build fails with the following output:

The log indicates that one of the packages I am using has bad references - it looks like it's unable to link to the contents of a .dll

Relevant lines from the log:

I have attempted overriding references in the asmdefs and manually adding references to the dlls.

Why is this not working on Ubuntu?

 

I can confirm this is also an issue with the regular graphical Unity Editor in Ubuntu.

Any package that depends on a precompiled .dll has broken references in Ubuntu.

 

+1

Same problem here. Trying to setup a CI with ubuntu on GItHub, and it get failed when looking for DOTween .dlls