{
  description = "confwhich: easily obtain info about XDG_CONFIG useage";

  inputs = {
    nixpkgs.url = "nixpkgs/nixpkgs-unstable";

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

  outputs =
    { nixpkgs, rust-overlay, ... }:
    let
      systems = [
        "x86_64-linux"
        "aarch64-linux"
      ];

      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
    in
    {
      devShells = forAllSystems (
        system:
        let
          overlays = [ (import rust-overlay) ];
          pkgs = import nixpkgs {
            inherit system overlays;
          };
          rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
        in
        {
          default = pkgs.mkShell {
            buildInputs = [
              rustToolchain
            ];
          };
        }
      );

      formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.nixfmt-rfc-style);

      packages = forAllSystems (
        system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
          deskwhich-pkg = (pkgs.callPackage ./nix/package.nix { });
        in
        {
          deskwhich = deskwhich-pkg;
          default = deskwhich-pkg;
        }
      );
    };
}