flake.nix

{
  description = "Description for the project";

  inputs = {
    flake-parts.url = "github:hercules-ci/flake-parts";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };

  outputs = inputs @ {flake-parts, ...}:
    flake-parts.lib.mkFlake {inherit inputs;} {
      imports = [./pkgs];

      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "aarch64-darwin"
        "x86_64-darwin"
      ];

      perSystem = {
        config,
        self',
        inputs',
        pkgs,
        system,
        ...
      }: {
        # This sets `pkgs` to a nixpkgs with allowUnfree option set.
        _module.args.pkgs = import inputs.nixpkgs {
          inherit system;
          overlays = [inputs.rust-overlay.overlays.default];
          config.allowUnfree = true;
        };

        formatter = pkgs.alejandra;
      };
    };
}