1{lib, config, ...}: 2 3let kernel = config.boot.kernelPackages; 4in 5 6{ 7 8 ###### interface 9 10 options = { 11 12 services.frandom.enable = lib.mkOption { 13 default = false; 14 type = lib.types.bool; 15 description = '' 16 enable the /dev/frandom device (a very fast random number generator) 17 ''; 18 }; 19 20 }; 21 22 23 ###### implementation 24 25 config = lib.mkIf config.services.frandom.enable { 26 boot.kernelModules = [ "frandom" ]; 27 boot.extraModulePackages = [ kernel.frandom ]; 28 services.udev.packages = [ kernel.frandom ]; 29 }; 30 31}