Decided to take the plunge today and finally set up @nixos_org secrets management with #sopsnix, so that I could set up declarative email, calendars, and contacts in #nix home manager using #vdirsyncer, #khal, #khard, #mbsync, #notmuch, and #aerc. The documentation still isn't good enough, so I had to dive into the source nix files for the various home-manager options, but it wasn't too bad, and it was fun!