{
  description = "A Nix build Scheduler";

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

    nix = {
      url = "github:NixOS/nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      nix,
    }:
    let
      lib = nixpkgs.lib;

      forSystem =
        f: system:
        f {
          inherit system;
          pkgs = import nixpkgs { inherit system; };
        };

      supportedSystems = [ "i686-linux" "x86_64-linux" "aarch64-linux" ];
      forAllSystems = f: lib.genAttrs supportedSystems (forSystem f);
    in
    {
      devShells = forAllSystems (
        { system, pkgs }:
        {
          default = pkgs.mkShell {
            name = "dev";

            inputsFrom = [ self.packages.${system}.evanix ];
            packages = with pkgs; [
              nixfmt-rfc-style
              jq
              gdb
              ccls
              valgrind
              clang-tools # clang-format
              flamegraph
              nix-eval-jobs
              linuxKernel.packages.linux_6_6.perf
              hyperfine
              nix-eval-jobs

              pyright
              (python3.withPackages (p: [
                p.scipy
                p.tqdm
                p.scikit-learn
              ]))
            ];

            shellHook = ''
              export PS1="\033[0;34m[󱄅 ]\033[0m $PS1"
            '';
          };
        }
      );

      packages = forAllSystems (
        { system, pkgs }:
        let
          nixPkg = nix.packages.${system}.nix;
        in
        {
          default = self.packages.${system}.evanix;
          evanix = pkgs.callPackage ./package.nix { nix = nixPkg; };
          evanix-asan = self.packages.${system}.evanix.overrideAttrs (
            _: previousAttrs: {
              mesonFlags = previousAttrs.mesonFlags ++ [ (lib.mesonOption "b_sanitize" "address") ];
            }
          );

          evanix-py = pkgs.python3Packages.callPackage ./python-package.nix { nix = nixPkg; };
          pythonWithEvanix =
            let
              wrapper = pkgs.python3.withPackages (ps: [
                (ps.callPackage ./python-package.nix { nix = nixPkg; })
              ]);
            in
            wrapper.overrideAttrs (oldAttrs: {
              makeWrapperArgs = oldAttrs.makeWrapperArgs or [ ] ++ [
                "--prefix"
                "PATH"
                ":"
                "${lib.makeBinPath [ pkgs.nix-eval-jobs ]}"
              ];
            });
        }
      );
      legacyPackages = forAllSystems (
        { pkgs, system, ... }:
        let
          nixPkg = nix.packages.${system}.nix;
        in
        {
          nixosTests = pkgs.callPackage ./nixos/tests/all-tests.nix { nix = nixPkg; };
        }
      );
      checks = forAllSystems (
        { system, pkgs, ... }:
        let
          inherit (pkgs.lib)
            filterAttrs
            isDerivation
            mapAttrs'
            nameValuePair
            pipe
            ;
        in
        pipe self.legacyPackages.${system}.nixosTests [
          (filterAttrs (_: p: isDerivation p))
          (mapAttrs' (name: nameValuePair "nixosTests-${name}"))
        ]
        // {
          inherit (self.packages.${system}) evanix evanix-py;
        }
      );
    };
}