DMD on OSX broken?

[WebFreak001]

I'm using DMD on the GitHub Actions OSX runner and suddenly I'm 
getting these weird linker errors: 
https://github.com/Pure-D/serve-d/runs/4240327451?check_suite_focus=true

anyone else getting errors like that? I don't have a mac so I 
have no way of checking if it actually happens on real devices or 
how to fix it.

I have `env MACOSX_DEPLOYMENT_TARGET=10.12` set because I wanted 
to support older OSX versions, not sure if that's something that 
could influence this error