infra/modules/core/nix.nix

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Nix
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{
config,
pkgs,
lib,
flake,
...
}:
{
nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ ];
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nix = {
# Use default version alias for nix package
package = pkgs.nix;
gc.automatic = true;
optimise.automatic = true;
registry = {
nixpkgs.flake = flake.inputs.nixpkgs;
unstable.flake = flake.inputs.unstable;
system.flake = flake.self;
};
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settings = {
# Improve nix store disk usage
auto-optimise-store = true;
# Prevents impurities in builds
sandbox = true;
# Give root and @wheel special privileges with nix
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trusted-users = [
"root"
"@wheel"
];
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# Allow only group wheel to connect to the nix daemon
allowed-users = [ "@wheel" ];
};
# Generally useful nix option defaults
extraOptions = lib.mkForce ''
experimental-features = flakes nix-command
min-free = 536870912
keep-outputs = true
keep-derivations = true
fallback = true
'';
nixPath = [
"nixpkgs=${flake.inputs.nixpkgs}"
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"nixos-config=${../../lib/compat/nixos}"
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"home-manager=${flake.inputs.home-manager}"
];
};
}