So in my production deploy, it is in:
/app/lib/my_app-1.0/priv
The rest of libraries also have a priv directory.
I’m accessing that directory via:
app = Mix.Project.config[:app]
path = :filename.join(:code.priv_dir(unquote(app)), 'the_file')
It seems you’ve already tried these though, so I’m not sure exactly what you’re missing.
I’d suggest logging in via ssh and checking if the file exists on disk.
$ fly ssh console -a your_app
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