{
  description = "rand-testsuite";

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

    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    cargo2nix = {
      url = "github:DarkKirb/cargo2nix/master";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
      inputs.rust-overlay.follows = "rust-overlay";
    };
    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
  };

  outputs = {
    self,
    nixpkgs,
    flake-utils,
    rust-overlay,
    cargo2nix,
    ...
  } @ inputs:
    flake-utils.lib.eachSystem ["x86_64-linux"] (system: let
      overlays = [
        cargo2nix.overlays.default
        (import rust-overlay)
      ];
      pkgs = import nixpkgs {
        inherit system overlays;
      };
      registryDownloadPaths = {
        "sparse+https://git.chir.rs/api/packages/ProcyOS/cargo/" = "https://git.chir.rs/api/packages/ProcyOS/cargo/api/v1/crates";
      };
      rustPkgs = pkgs.rustBuilder.makePackageSet {
        packageFun = import ./Cargo.nix;
        rustChannel = "nightly";
        rustVersion = "latest";
        packageOverrides = pkgs: pkgs.rustBuilder.overrides.all;
        rootFeatures = [
          "rand_testsuite/default"
          "rand_testsuite/full"
        ];
        fetchCrateAlternativeRegistry = {
          index,
          name,
          version,
          sha256,
        }:
          pkgs.fetchurl {
            name = "${name}-${version}.tar.gz";
            url = "${registryDownloadPaths.${index}}/${name}/${version}/download";
            inherit sha256;
          };
      };
    in rec {
      devShells.default = with pkgs;
        mkShell {
          buildInputs = [
            (rust-bin.nightly.latest.default.override {
              extensions = ["rust-src"];
            })
            cargo2nix.packages.${system}.cargo2nix
            llvmPackages_19.bintools
            rustfilt
            openssl
            pkg-config
            gdb
          ];
        };
      packages = pkgs.lib.mapAttrs (_: v: v {}) rustPkgs.workspace;
      nixosModules.default = import ./nixos {
        inherit inputs system;
      };
      checks = pkgs.lib.mapAttrs (_: v: pkgs.rustBuilder.runTests v {}) rustPkgs.workspace;
      hydraJobs = {
        inherit packages checks;
      };
      formatter = pkgs.alejandra;
    });
}
# Trick renovate into working: "github:NixOS/nixpkgs/nixpkgs-unstable"