I have a custom S3 substituter. If I enter a
nix develop, it may want to build a derivation for one of two reasons:
- The substituter does not have that derivation.
- The substituter is busted (e.g. I’ve broken my AWS configuration and S3 returns Access Denied)
If it’s because of #2, the failure is effectively silent. Is there a way to make that failure more noisy?