nixos/profiles/builder.nix

   1 { lib, inputs, ... }:
   2 {
   3   nix.settings.experimental-features = [ "nix-command" "flakes" "repl-flake" ];
   4   #nix.registry.self.flake = inputs.self;
   5   # Pin the rev to the revision of the public Nixpkgs that the system was built from.
   6   # This is the version which will be locked by flakes using flake:nixpkgs
   7   nix.registry.nixpkgs = {
   8     from = { id = "nixpkgs"; type = "indirect"; };
   9     to = {
  10       owner = "NixOS";
  11       repo = "nixpkgs";
  12       inherit (inputs.nixpkgs) rev;
  13       type = "github";
  14     };
  15   };
  16   nix.nixPath = [
  17     "nixpkgs=${inputs.nixpkgs}"
  18   ];
  19
  20   systemd.services.nix-daemon.serviceConfig = {
  21     CPUSchedulingPolicy = lib.mkForce "batch";
  22     IOSchedulingClass = lib.mkForce "best-effort";
  23     # 0: high priority, 7: low priority
  24     IOSchedulingPriority = lib.mkForce 4;
  25     Nice = 0;
  26   };
  27
  28   systemd.services.nix-gc.serviceConfig = {
  29     CPUSchedulingPolicy = "batch";
  30     IOSchedulingClass = "best-effort";
  31     IOSchedulingPriority = 7;
  32     Nice = 5;
  33   };
  34
  35   systemd.sleep.extraConfig = ''
  36     AllowSuspend=no
  37     AllowHibernation=no
  38   '';
  39 }