It works without phoenix, use the right command to set up a new project

Or even better, use the command generator on https://ash-hq.org/
Pitfall
if postgres is not running during installation, you need to do mix phx.install or whatever the setup commands are anew (it’s been a struggle before)
Use the postgres app ideally

Create new resource:
Ash brings generator that write code for you.
mix ash.gen.resource Wortwildnis.Dictionary.Term --extend postgres
Generate migrations:
mix ash.codegen create_terms
When it’s complaining ash postgres not installed: