nixos/config/nix.nix

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Nix
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{ nixpkgs, nixpkgs-git, nixpkgs-stable, pkgs, config, lib, ... }:
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let
cfg = config.machine;
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emptyGlobalRegistry = pkgs.writeText "registry.json" ''{ "flakes": [], "version": 2 }'';
in {
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nix = {
package = pkgs.nix;
registry = {
nixpkgs.flake = nixpkgs;
nixpkgs-git.flake = nixpkgs-git;
nixpkgs-stable.flake = nixpkgs-stable;
};
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settings = {
max-jobs = 4;
cores = 1;
sandbox = true;
auto-optimise-store = true;
trusted-substituters = [
"https://cache.nixos.org"
] ++ cfg.binaryCaches;
# TODO: integrate into sops
# trusted-public-keys = [ (lib.fileContents "${cfg.secretPath}/hydra_cache.pub") ];
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substituters = [
"https://cache.nixos.org"
] ++ cfg.binaryCaches;
allowed-users = [ "root" ] ++ (map (n: n.name) cfg.administrators);
};
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extraOptions = ''
build-timeout = 86400 # 24 hours
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experimental-features = nix-command flakes
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flake-registry = ${emptyGlobalRegistry}
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'';
};
}