nixos-config/config/nix.nix

{
  pkgs,
  lib,
  config,
  system,
  ...
}: {
  imports = [
    ./workarounds
  ];
  nixpkgs.config.allowUnfree = true;
  nix = {
    settings = {
      sandbox = true;
      trusted-users = ["@wheel" "remote-build"];
      require-sigs = true;
      builders-use-substitutes = true;
      substituters = [
        "https://cache.chir.rs/"
      ];
      trusted-public-keys = [
        "nixcache:8KKuGz95Pk4UJ5W/Ni+pN+v+LDTkMMFV4yrGmAYgkDg="
        "hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs="
        "chir-rs:/iTDNHmQw1HklELHTBAVDFVAFaJ3ACGu3eezVUtplKc="
        "riscv:TZX1ReuoIGt7QiSQups+92ym8nKJUSV0O2NkS4HAqH8="
        "cache.ztier.link-1:3P5j2ZB9dNgFFFVkCQWT3mh0E+S3rIWtZvoql64UaXM="
      ];
      auto-optimise-store = true;
    };
    package = pkgs.nix;
    extraOptions = ''
      experimental-features = nix-command flakes ca-derivations
    '';
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };
    buildMachines = with lib;
      mkMerge [
        (mkIf (config.networking.hostName != "instance-20221213-1915") [
          {
            hostName = "build-aarch64";
            systems = [
              "aarch64-linux"
              "riscv32-linux"
              "riscv64-linux"
            ];
            maxJobs = 4;
            speedFactor = 1;
            supportedFeatures = ["nixos-test" "benchmark" "ca-derivations" "gccarch-armv8-a" "gccarch-armv8.1-a" "gccarch-armv8.2-a" "big-parallel"];
          }
        ])
        (mkIf (config.networking.hostName != "nas") [
          {
            hostName = "build-nas";
            systems = [
              "armv7l-linux"
              "powerpc-linux"
              "powerpc64-linux"
              "powerpc64le-linux"
              "wasm32-wasi"
              "riscv32-linux"
              "riscv64-linux"
            ];
            maxJobs = 12;
            speedFactor = 1;
            supportedFeatures = [
              "kvm"
              "nixos-test"
              "big-parallel"
              "benchmark"
              "gccarch-znver1"
              "gccarch-skylake"
              "ca-derivations"
            ];
          }
        ])
        (mkIf (config.networking.hostName != "nutty-noon") [
          {
            hostName = "build-pc";
            systems = [
              "armv7l-linux"
              "powerpc-linux"
              "powerpc64-linux"
              "powerpc64le-linux"
              "wasm32-wasi"
              "riscv32-linux"
              "riscv64-linux"
            ];
            maxJobs = 16;
            speedFactor = 1;
            supportedFeatures = [
              "kvm"
              "nixos-test"
              "big-parallel"
              "benchmark"
              "gccarch-znver2"
              "gccarch-znver1"
              "gccarch-skylake"
              "ca-derivations"
            ];
          }
        ])
        (mkIf (config.networking.hostName != "vf2") [
          {
            hostName = "build-riscv";
            systems = [
              "riscv32-linux"
              "riscv64-linux"
            ];
            maxJobs = 4;
            speedFactor = 2;
            supportedFeatures = [
              "nixos-test"
              "big-parallel"
              "benchmark"
              "ca-derivations"
              # There are many more combinations but i simply do not care lol
              "gccarch-rv64gc_zba_zbb"
              "gccarch-rv64gc_zba"
              "gccarch-rv64gc_zbb"
              "gccarch-rv64gc"
              "gccarch-rv32gc_zba_zbb"
              "gccarch-rv32gc_zba"
              "gccarch-rv32gc_zbb"
              "gccarch-rv32gc"
              "native-riscv"
            ];
          }
        ])
      ];
    distributedBuilds = true;
  };
  systemd.services.nix-daemon.environment.TMPDIR = "/build";
  system.autoUpgrade = {
    enable = true;
    flake = "github:DarkKirb/nixos-config";
    flags = [
      "--no-write-lock-file"
      "-L" # print build logs
    ];
    dates = "hourly";
    randomizedDelaySec = "1h";
  };
}