Update nixpkgs.

nix store diff-closures

VirtualBox-GuestAdditions: 6.1.22-5.10.77 → 6.1.22-5.10.79
cpupower: 5.10.77 → 5.10.79
ena: 2.5.0-5.10.77 → 2.5.0-5.10.79
firmware-linux-nonfree: 2021-09-19 → 20211027, +15969.3 KiB
initrd-linux: 5.10.77 → 5.10.79, -57.5 KiB
linux: 5.10.77, 5.10.77-modules → 5.10.79, 5.10.79-modules
mdadm.conf: ∅ → ε
nixos-system-monitoring: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-payments: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage001: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage002: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage003: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage004: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage005: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage1: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
nixos-system-storage2: 21.05.4044.e74894146a4 → 21.05.4114.195d5816cdd
stage: +58.0 KiB
zfs-kernel: 2.0.6-5.10.77 → 2.0.6-5.10.79