I don’t know if it has to do anything with your issue but the script is failing with
* assembling <<project>>-0.1.0 on MIX_ENV=prod
<snip>
Cannot read "<<project_root>>/_build/prod/rel/<<Project>>/releases/0.1.0/start.script"
And you listed files from _build/dev.
(I actually have a similar weird issue with scenic where the driver always seems to be put in the wrong environment, but I didn’t have a chance to investigate).
