{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    naersk.url = "github:nix-community/naersk";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, flake-utils, naersk, nixpkgs }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = (import nixpkgs) { inherit system; };
        naersk' = pkgs.callPackage naersk { };
        libPath = with pkgs;
          lib.makeLibraryPath [
            glibc
          ];

      in rec {
        # For `nix build` & `nix run`:
        packages.default = naersk'.buildPackage {
          src = ./.;
          pname = "vtub";
          nativeBuildInputs = with pkgs; [
            makeWrapper
            pkg-config
            openssl
          ];
          GIT_HASH = "000000000000000000000000000000";
          postInstall = ''
            wrapProgram "$out/bin/${packages.default.pname}" --prefix LD_LIBRARY_PATH : "${libPath}"
          '';
        };

        # For `nix develop`:
        devShells.default = pkgs.mkShell {
          nativeBuildInputs = with pkgs; [
            godot_4
          ];
          LD_LIBRARY_PATH = libPath;
          env = {
            VK_LAYER_PATH = "${pkgs.vulkan-validation-layers}/share/vulkan/explicit_layer.d";
            RUST_BACKTRACE = 1;
            RUST_LOG = "debug";
          };
        };
      });
}