{
  description = "FabApp";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
  };

  outputs = inputs@{ flake-parts, nixpkgs, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      flake = { };

      systems = [ "x86_64-linux" ];

      # https://flake.parts/module-arguments.html#persystem-module-parameters
      perSystem = { pkgs, system, ... }: {

        _module.args.pkgs = import inputs.nixpkgs-unstable {
          inherit system;
          # https://flake.parts/overlays
          # NOTE: zig overlay triggers issues with X11/GL libraries
          # This might be misconfiguration on my end
          overlays = [ ];
          config = { };
        };

        formatter = pkgs.nixfmt;

        devShells.default = with pkgs;
          mkShell {
            # EM_CONFIG = pkgs.writeText ".emscripten" ''
            #   EMSCRIPTEN_ROOT = '${pkgs.emscripten}/share/emscripten'
            #   LLVM_ROOT = '${pkgs.emscripten.llvmEnv}/bin'
            #   BINARYEN_ROOT = '${pkgs.binaryen}'
            #   NODE_JS = '${pkgs.nodejs-18_x}/bin/node'
            #   CACHE = '${toString ./.cache}'
            # '';

            nativeBuildInputs = [ clang cmake just ninja tup ];

            buildInputs = [
              sqlite

              # Zig / webAssembly impl.
              zig
              zls
              emscripten

              # Linux graphical deps
              ## X11              
              xorg.libX11
              xorg.libXcursor
              xorg.libXi
              xorg.libXext
              xorg.libXrandr
              xorg.libXinerama
              xorg.libxcb
              libGL
              libGLU
              pkg-config

              ## Wayland
              wayland-protocols
              wayland
              libxkbcommon
            ];

          };

      };
    };
}