Avoid `rec` and correct indentation in `pkgs/top-level/kodi-packages.nix`

  inherit (libretro) fuse genesis-plus-gx mgba nestopia snes9x twenty-fortyeight;

  self = rec {

  callPackage = newScope self;

  # Check whether a derivation provides a Kodi addon.

  hasKodiAddon = drv: drv ? kodiAddonFor && drv.kodiAddonFor == kodi;

  # Get list of required Kodi addons given a list of derivations.

  requiredKodiAddons = drvs:

    let

      modules = filter hasKodiAddon drvs;

    in

      unique (modules ++ concatLists (catAttrs "requiredKodiAddons" modules));

  self = {

    addonDir = "/share/kodi/addons";

  rel = "Nexus";

  callPackage = newScope self;

    rel = "Nexus";

  inherit kodi;

    inherit callPackage kodi hasKodiAddon requiredKodiAddons;

    # Convert derivation to a kodi module. Stolen from ../../../top-level/python-packages.nix

    toKodiAddon = drv: drv.overrideAttrs (oldAttrs: {

      };

    });

  # Check whether a derivation provides a Kodi addon.

  hasKodiAddon = drv: drv ? kodiAddonFor && drv.kodiAddonFor == kodi;

  # Get list of required Kodi addons given a list of derivations.

  requiredKodiAddons = drvs:

    let

      modules = filter hasKodiAddon drvs;

    in

      unique (modules ++ concatLists (catAttrs "requiredKodiAddons" modules));

    # package update scripts

    addonUpdateScript = callPackage ../applications/video/kodi/addons/addon-update-script { };