Joseph

Hmm, I'm getting the opposite error right now: ``` error: hash mismatch in fixed-output derivation '/nix/store/a56mz008i9cnfmxrqszlfcvb3ysjq79l-jackson-parent-2.12.pom.drv': specified: sha256-Z749r6r4zhcX56fefbkrpDPfkjtpekDJdDpUzJ/FNjc= got: sha256-YqocFnmt4J8XPb8bbDLTXFXnWAAjj9XkjxOqQzfAh1s= ```

+1 to this. I'm in the process of setting up some CI for my own nix builds and having this would be super useful for caching - with the current...

Probably going to take a stab at a PR for this in the near-ish future hopefully, have a POC of this that I *think* is working (I still need to...

@aveenismail I tried your branch https://github.com/Yubico/yubico-piv-tool/tree/ed_ykcs11 in a different context - using https://github.com/latchset/pkcs11-provider - as I was running into the same `Unable to get attribute 0x180` / `Unable to get...

Yep, that solves the failed to store issue!