{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
  };

  outputs = { self, nixpkgs }: {

    overlay = final: prev: {
      theme-platinum9 = with final; stdenv.mkDerivation {
        pname = "theme-platinum9";
        name = "theme-platinum9";
        version = "d3d2080c1a2d5772714d089d1dc1daeeb41db008";

        src = fetchGit {
          url = "https://git.atauno.com/atau/Platinum9.git";
          rev = theme-platinum9.version;
        };

        installPhase = ''
          runHook preInstall

          # Install themes
          mkdir -p "$out/share/themes"
          mv ClassicPlatinumStreamlined "$out/share/themes"
          mv PlatiPlus "$out/share/themes"
          mv PlatiPlus26 "$out/share/themes"

          # Install icons
          mkdir -p "$out/share/icons"
          mv NineIcons/ "$out/share/icons" 

          # Install fonts
          mkdir -p "$out/share/fonts/truetype"
          mv Charcoal.ttf "$out/share/fonts/truetype"
          mv MONACO.TTF "$out/share/fonts/truetype"

          # Install wallpapers
          mkdir -p "$out/share/backgrounds"
          mv OS9-wallpaper/ "$out/share/backgrounds"

          runHook postInstall
        '';

        meta = with lib; {
          homepage = "https://github.com/grassmunk/Platinum9.git";
          description = "This is a quick and dirty theme meant to approximate (but not really be too pixel accurate) the MacOS 9 (or System 7) theme.";
          platforms = platforms.unix;
          maintainers = with maintainers; [ atau ];
        };
      };
    };

    packages.x86_64-linux.theme-platinum9 = (import nixpkgs {
      system = "x86_64-linux";
      overlays = [ self.overlay ];
    }).theme-platinum9;
  };
}