{
  description = "Answer to one of the MIT Mystery Hunt 2023 puzzles";

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

  outputs = {
    self,
    nixpkgs,
    flake-utils,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (
      system: let
        pkgs = import nixpkgs {inherit system;};
        projectFile = "./Reactivation/Reactivation.fsproj";
        testProjectFile = "./Reactivation.Test/Reactivation.Test.fsproj";
        pname = "reactivation";
        dotnet-sdk = pkgs.dotnet-sdk_8;
        dotnet-runtime = pkgs.dotnetCorePackages.runtime_8_0;
        version = "0.0.1";
        dotnetTool = toolName: toolVersion: hash:
          pkgs.stdenvNoCC.mkDerivation rec {
            name = toolName;
            version = toolVersion;
            nativeBuildInputs = [pkgs.makeWrapper];
            src = pkgs.fetchNuGet {
              pname = name;
              version = version;
              hash = hash;
              installPhase = ''mkdir -p $out/bin && cp -r tools/net6.0/any/* $out/bin'';
            };
            installPhase = ''
              runHook preInstall
              mkdir -p "$out/lib"
              cp -r ./bin/* "$out/lib"
              makeWrapper "${dotnet-runtime}/bin/dotnet" "$out/bin/${name}" --add-flags "$out/lib/${name}.dll"
              runHook postInstall
            '';
          };
      in {
        packages = {
          fantomas = dotnetTool "fantomas" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fantomas.version (builtins.head (builtins.filter (elem: elem.pname == "fantomas") ((import ./nix/deps.nix) {fetchNuGet = x: x;}))).hash;
          default = pkgs.buildDotnetModule {
            pname = pname;
            version = version;
            src = ./.;
            projectFile = projectFile;
            testProjectFile = testProjectFile;
            nugetDeps = ./nix/deps.nix; # `nix build .#default.passthru.fetch-deps && ./result` and put the result here
            doCheck = true;
            dotnet-sdk = dotnet-sdk;
            dotnet-runtime = dotnet-runtime;
          };
        };
        app = {
          default = {
            tyoe = "app";
            program = "${self.packages.${system}.default}/bin/Reactivation/Reactivation";
          };
        };
        devShells = {
          default = pkgs.mkShell {
            buildInputs = [dotnet-sdk pkgs.git pkgs.alejandra pkgs.nodePackages.markdown-link-check];
          };
        };
      }
    );
}