{
  description = "A very basic flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    tix.url = "git+https://git.tristans.cloud/tristan/tix";
  };

  outputs = { self, nixpkgs, tix }: let
    pkgs = import nixpkgs {system = "x86_64-linux";};
  in {

    day06 = let
      solution = import ./06/solution.nix pkgs;
      example = (pkgs.lib.readFile ./06/example.txt);
      input = (pkgs.lib.readFile ./06/input.txt);
    in {
      example = (solution example);
      real = (solution input);
    };

    day07 = let
      solution = import ./07/solution.nix pkgs;
      example = (pkgs.lib.readFile ./07/example.txt);
      input = (pkgs.lib.readFile ./07/input.txt);
    in {
      example = (solution example);
      real = (solution input);
      test = tix.run [
        ./07/solution.test.nix
      ];
    };

    day08 = let
      solution = import ./08/solution.nix pkgs;
      example = (pkgs.lib.readFile ./08/example);
      input = (pkgs.lib.readFile ./08/input);
    in {
      example = solution example;
      real = solution input;
      test = tix.run [
        ./08/solution.test.nix
      ];
    };

    day09 = let
      solution = import ./09/bad.solution.nix pkgs;
      example = (pkgs.lib.readFile ./09/example.txt);
    in {
      example = solution example;
      real.part1result = "My solution doesn't work on the real input :(";
      test = tix.run [
        ./09/solution.test.nix
      ];
    };

  };
}