
QEMU can allow guests to access more than one host core at a time. Previously, this had to be done via ad-hoc arguments: virtualisation.qemu.options = ["-smp 12"]; Now you can simply specify: virtualisation.cores = 12;
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.