{
  nixpkgs.overlays = [
    (final: prev: {
      base16-schemes = prev.base16-schemes.overrideAttrs (oldAttrs: {
        version = "unstable-2023-05-02";

        src = prev.fetchFromGitHub {
          owner = "tinted-theming";
          repo = "base16-schemes";
          rev = "9a4002f78dd1094c123169da243680b2fda3fe69";
          hash = "sha256-AngNF++RZQB0l4M8pRgcv66pAcIPY+cCwmUOd+RBJKA=";
        };

        installPhase = ''
          runHook preInstall

          mkdir -p $out/share/themes/
          install *.yaml $out/share/themes/

          runHook postInstall
        '';
      });
    })
  ];
}