{
	description = "NixOS Sample Package";

	inputs = {
		nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
	};

	outputs = { self, nixpkgs } @inputs:
		let
			system = "x86_64-linux";
			pkgs   = nixpkgs.legacyPackages.${system};
			lib    = nixpkgs.lib;
		in {
			packages.${system}.default = pkgs.stdenv.mkDerivation rec {
				pname   = "Sample Package";
				version = "1.0";

				# Fetch sources.
				src = inputs.self;
				# src = pkgs.fetchurl {
				# 	url  = "https://git.voronind.com/voronind/nixos_sample_package/archive/v1.tar.gz";
				# 	hash = "sha256-zAXcCiRqOgMBChqabFjCmAaux1Yb9N+Y5jcE22zT3OI=";
				# };

				# Bins go here.
				nativeBuildInputs = with pkgs; [
					cargo
					rustc
				];

				# Libs go here.
				buildInputs = [
					# libGL
				];

				buildPhase = ''
					cargo build --release
				'';

				installPhase = ''
					mkdir -p $out/bin
					cp target/release/nixos_sample_package $out/bin
				'';
			};
		};
}