Cannot launch a new app

[bcardarella]

When I run fly launch I get:

=> ERROR [stage-1 6/6] COPY --from=builder --chown=nobody:root /app/_build/prod/rel/elixirisweird ./                                                                0.0s
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 > [stage-1 6/6] COPY --from=builder --chown=nobody:root /app/_build/prod/rel/elixirisweird ./:
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Error: failed to fetch an image or build from source: error building: failed to solve: failed to compute cache key: failed to calculate checksum of ref q2cqc71c0cd1jxux74kdyfq80::k2yvua9vj5nwrq7i5gas48cc3: "/app/_build/prod/rel/elixirisweird": not found

I have pruned everything in Docker. I have run fly deploy --recreate-builder I have searched the forum here, there are others who have had the issue and Fly reps never replied or just let it go stale and it auto-closed.

[chrismccord]

Is this is a stock phoenix Dockerfile? I just launched a fresh phoenix app and worked as expected. Your builder itself could be wedged for some reason, which you could try resetting by clicking “App Builders” in the sidebar, then “Reset”