inputs: _final: prev: {

  # Based on:
  # https://git.sr.ht/~rycee/nur-expressions/tree/master/item/pkgs/firefox-addons/default.nix#L34

  bypass-paywalls-clean = let addonId = "magnolia@12.34";
  in prev.stdenv.mkDerivation rec {
    pname = "bypass-paywalls-clean";
    version = "3.4.9.0";
    src = inputs.bypass-paywalls-clean + "/bypass_paywalls_clean-latest.xpi";
    preferLocalBuild = true;
    allowSubstitutes = true;
    buildCommand = ''
      dst="$out/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}"
      mkdir -p "$dst"
      install -v -m644 "${src}" "$dst/${addonId}.xpi"
    '';
  };

}