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nix-configuration/modules/base/nix.nix

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Nix

# Nix configuration
{ pkgs, config, lib, inputs, ... }: {
nix = {
# Use the latest and greatest Nix
package = pkgs.nixVersions.unstable;
settings = {
# Enables Flakes
experimental-features = [ "nix-command" "flakes" ];
# Avoid signature verification messages when doing remote builds
trusted-users = [ "${config.users.users.aires.name}" ];
};
# Enable periodic nix store optimization
optimise.automatic = true;
# Configure NixOS to use the same software channel as Flakes
registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
# Configure remote build machines (mainly Haven)
# To enable remote builds for a specific host, add `nix.distributedBuilds = true;` to its config
buildMachines = [{
hostName = "haven";
systems = [
"x86_64-linux"
"aarch64-linux"
];
protocol = "ssh-ng";
supportedFeatures = [
"nixos-test"
"kvm"
];
}];
# When using a builder, use its package store
extraOptions = ''
builders-use-substitutes = true
'';
};
}