crypto-loop-backed filesystems use encryption from the moment they are open by the crypto-loop initscript. Because of that, they could benefit from "use entropy" in the initscript's depend(). "Entropy" is provided by RNG control daemons such as rng-tools. Reproducible: Always
util-linux's crypto-loop code is dead you can also modify your /etc/conf.d/crypto-loop to declare custom deps ...