{
  description = "All things development";
  inputs.flake-parts.url = "github:hercules-ci/flake-parts";
  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixpkgs-unstable";
  inputs.pre-commit-hooks-nix.url = "github:cachix/pre-commit-hooks.nix";
  inputs.treefmt-nix.url = "github:numtide/treefmt-nix";

  nixConfig = {
    nix = ["http://cache.home"];
  };

  outputs = inputs @ {
    flake-parts,
    pre-commit-hooks-nix,
    treefmt-nix,
    self,
    ...
  }:
    flake-parts.lib.mkFlake {inherit inputs;} {
      imports = [
        treefmt-nix.flakeModule
        pre-commit-hooks-nix.flakeModule
      ];
      systems = ["x86_64-linux"];
      perSystem = {
        config,
        self',
        pkgs,
        lib,
        ...
      }: let
        mdpls = let
          version = "30761508593d85b5743ae39c4209947740eec92d";
        in
          pkgs.rustPlatform.buildRustPackage {
            inherit version;
            pname = "mdpls";

            src = pkgs.fetchFromGitHub {
              owner = "euclio";
              repo = "mdpls";
              rev = version;
              sha256 = "sha256-4n1MX8hS7JmKzaL8GfMq2q3IdwE4fvMmWOYo7rY+cdY=";
            };

            cargoSha256 = "sha256-J49A43BSCJGqaY7AX7XsoMwy6sgyaIx2Vz57Z1cFItc=";
          };

        packagesSharedByAll = with pkgs; [
          diff-so-fancy
          pre-commit
        ];

        scripts = {
          beste-schule-set-missing-grades = pkgs.writeShellApplication {
            name = "set-missing-grades";
            runtimeInputs = [
              pkgs.coreutils
              pkgs.jq
              pkgs.curl
            ];
            text = builtins.readFile ./scripts/set-missing-grades.sh;
          };
        };

        shells = {
          nix = {
            name = "generic nix";
            packages = with pkgs; [
              alejandra
              nil
            ];
          };
          node = {
            name = "generic node";
            packages = with pkgs; [
              nodejs
              yarn
              nodePackages.vls
              nodePackages.typescript-language-server
              nodePackages.yaml-language-server
              nodePackages.vscode-json-languageserver-bin
              nodePackages.vscode-html-languageserver-bin
              nodePackages.vscode-css-languageserver-bin
            ];
          };
          nodeIonic = {
            name = "generic node + ionic";
            packages =
              shells.node.packages
              ++ (with pkgs; [
                android-studio
              ]);
          };
          php = {
            name = "generic php";
            packages = with pkgs; [
              php
              phpPackages.composer
            ];
          };
          nodePhp = {
            name = "generic node + php";
            packages = with shells; node.packages ++ php.packages;
          };
          python = {
            name = "generic python";
            packages = with pkgs; [
              python3Packages.python-lsp-server
            ];
          };
          markdown = {
            name = "generic markdown";
            packages = [mdpls];
          };
          "beste-schule" = {
            name = "beste.schule";
            packages =
              [
                scripts.beste-schule-set-missing-grades
              ]
              ++ shells.nodePhp.packages;
          };
        };
      in {
        treefmt.projectRootFile = "flake.nix";
        treefmt.programs = {
          alejandra.enable = true;
        };
        treefmt.flakeFormatter = true;

        pre-commit.check.enable = true;
        pre-commit.settings.hooks.markdownlint.enable = true;
        pre-commit.settings.hooks.nil.enable = true;
        pre-commit.settings.hooks.format = {
          enable = true;
          entry = "${self'.formatter}/bin/treefmt";
          pass_filenames = false;
        };

        devShells =
          (pkgs.lib.attrsets.mapAttrs (name: value:
            pkgs.mkShell (pkgs.lib.recursiveUpdate value {
              packages = value.packages ++ packagesSharedByAll;
              shellHook = ''
                echo -e 1>&2 "\n\n  Welcome to the development shell!\n\n"
                ${pkgs.onefetch}/bin/onefetch
              '';
            }))
          shells)
          // {
            default = self'.devShells.nix.overrideAttrs (final: previous: {
              name = "dev";
              shellHook = ''
                echo -e 1>&2 "\n\n  Welcome to the development shell!\n\n"
                ${config.pre-commit.installationScript}
                ${pkgs.onefetch}/bin/onefetch
              '';
            });
          };

        packages = {
          inherit mdpls;
        };
      };
      flake = {
        hydraJobs =
          builtins.mapAttrs (name: value: {
            x86_64-linux = value;
          })
          self.devShells.x86_64-linux;

        templates = {
          rust = {
            path = ./rust;
            description = "Simple Rust + Nix template";
          };
        };
      };
    };
}