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

  outputs = inputs @ {
    self,
    nixpkgs,
    flake-utils,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = nixpkgs.legacyPackages.${system};
      projectFile = "./PureGym.App/PureGym.App.fsproj";
      testProjectFile = "./PureGym.Test/PureGym.Test.fsproj";
      pname = "puregym";
      dotnet-sdk = pkgs.dotnet-sdk_7;
      dotnet-runtime = pkgs.dotnetCorePackages.runtime_7_0;
      version = "0.1";
      dotnetTool = toolName: toolVersion: sha256:
        pkgs.stdenvNoCC.mkDerivation rec {
          name = toolName;
          version = toolVersion;
          nativeBuildInputs = [pkgs.makeWrapper];
          src = pkgs.fetchNuGet {
            pname = name;
            version = version;
            sha256 = sha256;
            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
          '';
        };
      fantomas = dotnetTool "fantomas" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fantomas.version "sha256-83RodORaC3rkYfbFMHsYLEtl0+8+akZXcKoSJdgwuUo=";
    in {
      packages = {
        fantomas = fantomas;
        fetchDeps = let
          flags = [];
          runtimeIds = ["win-x64"] ++ map (system: pkgs.dotnetCorePackages.systemToDotnetRid system) dotnet-sdk.meta.platforms;
        in
          pkgs.writeShellScriptBin "fetch-${pname}-deps" (builtins.readFile (pkgs.substituteAll {
            src = ./nix/fetchDeps.sh;
            pname = pname;
            binPath = pkgs.lib.makeBinPath [pkgs.coreutils dotnet-sdk (pkgs.nuget-to-nix.override {inherit dotnet-sdk;})];
            projectFiles = toString (pkgs.lib.toList projectFile);
            testProjectFiles = toString (pkgs.lib.toList testProjectFile);
            rids = pkgs.lib.concatStringsSep "\" \"" runtimeIds;
            packages = dotnet-sdk.packages;
            storeSrc = pkgs.srcOnly {
              src = ./.;
              pname = pname;
              version = version;
            };
          }));
        default = pkgs.buildDotnetModule {
          pname = pname;
          name = "puregym";
          version = version;
          src = ./.;
          projectFile = projectFile;
          nugetDeps = ./nix/deps.nix;
          doCheck = true;
          dotnet-sdk = dotnet-sdk;
          dotnet-runtime = dotnet-runtime;
        };
      };
      apps = {
        default = {
          type = "app";
          program = "${self.packages.${system}.default}/bin/PureGym.App";
        };
      };
      devShells.default = pkgs.mkShell {
        buildInputs =
          [pkgs.alejandra pkgs.dotnet-sdk_7 pkgs.python3 pkgs.nodePackages.markdown-link-check]
          ++ (
            if pkgs.stdenv.isDarwin
            then [pkgs.darwin.apple_sdk.frameworks.CoreServices]
            else []
          );
      };
      checks = {
        alejandra = pkgs.stdenvNoCC.mkDerivation {
          name = "alejandra-check";
          src = ./.;
          checkPhase = ''
            ${pkgs.alejandra}/bin/alejandra --check .
          '';
          installPhase = "mkdir $out";
          dontBuild = true;
          doCheck = true;
        };
        fantomas = pkgs.stdenvNoCC.mkDerivation {
          name = "fantomas-check";
          src = ./.;
          checkPhase = ''
            ${fantomas}/bin/fantomas --check .
          '';
          installPhase = "mkdir $out";
          dontBuild = true;
          doCheck = true;
        };
      };
    });
}