config/modules/nix-config/default.nix

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{ pkgs, lib, config, inputs, ... }:
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let
builder = {
systems = [ "x86_64-linux" "i686-linux" ];
speedFactor = 4;
supportedFeatures = [ "benchmark" "nixos-test" ];
sshKey = config.age.secrets.nixBuilderKey.path;
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protocol = "ssh-ng";
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};
bigBuilder = builder // {
speedFactor = 16;
supportedFeatures = builder.supportedFeatures ++ [ "kvm" "big-parallel" ];
};
in {
age.secrets.nixBuilderKey = {
file = ../../secrets/builder_key.age;
mode = "0400";
};
nixpkgs.overlays = [
(self: super: {
nixSuper = inputs.nix-super.packages.x86_64-linux.default;
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})
];
nix = {
package = pkgs.nixSuper;
settings = {
trusted-users = [ "root" "@wheel" ];
auto-optimise-store = true;
substituters = [
"https://cache.privatevoid.net"
];
trusted-public-keys = [
"cache.privatevoid.net:SErQ8bvNWANeAvtsOESUwVYr2VJynfuc9JRwlzTTkVg="
];
};
extraOptions = ''
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experimental-features = nix-command flakes repl-flake
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warn-dirty = false
builders-use-substitutes = true
flake-registry = https://git.privatevoid.net/private-void/registry/-/raw/master/registry.json
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max-free = ${toString (8 * 1024*1024*1024)}
min-free = ${toString (4 * 1024*1024*1024)}
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'';
gc = {
automatic = true;
dates = "weekly";
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options = "--delete-older-than 5d --max-freed 16G";
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};
distributedBuilds = true;
buildMachines = [
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(builder // {
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sshUser = "nix";
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hostName = "prophet.node.privatevoid.net";
systems = [ "aarch64-linux" ];
})
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] ++
(lib.optional (config.networking.hostName != "TITAN") (bigBuilder // {
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sshUser = "nix";
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hostName = "titan.hyprspace";
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speedFactor = 12;
maxJobs = 12;
}));
};
environment.systemPackages = [ pkgs.cachix ];
}