{
  description = "Flake for building FreeOrion (master branch)";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
    flake-utils.url = "github:numtide/flake-utils";
    freeorion-src.url = "github:freeorion/freeorion";
    freeorion-src.flake = false;
    # Optionally, pin to a commit: url = "github:freeorion/freeorion/COMMIT";
  };

  outputs = { self, nixpkgs, flake-utils, freeorion-src }: 
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };

        buildInputs = with pkgs; [
          cmake
          git
          python310
          pkg-config
          boost
          python310Packages.boost
          zlib
          freetype
          libpng
          libvorbis
          libogg
          openal
          SDL2
          glew
        ];
        nativeBuildInputs = with pkgs; [
          cmake
          git
          pkg-config
          makeWrapper
        ];
      in
      {
        packages.freeorion = pkgs.stdenv.mkDerivation {
          pname = "freeorion";
          version = "unstable"; # or use date/commit
          src = freeorion-src;  # Use flake input as src

          buildInputs = buildInputs;
          nativeBuildInputs = nativeBuildInputs;

          cmakeFlags = [
            "-DCMAKE_BUILD_TYPE=Release"
            "-DBUILD_TESTING=Off"
            "-DCMAKE_INSTALL_RPATH=$out/lib"
            "-DCMAKE_BUILD_WITH_INSTALL_RPATH=ON"
          ];

          doCheck = false;

          installPhase = ''
            # mkdir -p $out/bin
            # cp /build/source/build/freeorion $out/bin
            # cp /build/source/build/freeorionca $out/bin
            # cp /build/source/build/freeoriond $out/bin
            cmake --install . --prefix=$out
            wrapProgram $out/bin/freeorion --set LD_LIBRARY_PATH "$out/lib/freeorion:${pkgs.stdenv.cc.cc.lib}/lib"
          '';

          # postFixup = ''
          #   patchelf --set-rpath $out
          # '';
          
          meta = with pkgs.lib; {
            description = "FreeOrion, a free, open source, turn-based space empire and galactic conquest game";
            homepage = "https://www.freeorion.org/";
            license = licenses.gpl2Plus;
            maintainers = with maintainers; [ ];
            platforms = platforms.linux;
          };
        };
        defaultPackage = self.packages.${system}.freeorion;
      });
}