Have you tried updating to git master today?
Possibly something related to:
https://github.com/D-Programming-Language/dmd/pull/3715
- Problem Linking Phobos git master Nordlöw
- Re: Problem Linking Phobos git maste... Kapps via Digitalmars-d-learn
- Re: Problem Linking Phobos git m... Nordlöw
- Re: Problem Linking Phobos g... Nordlöw
- Re: Problem Linking Phobos git maste... Mike Wey via Digitalmars-d-learn