self: super: {
  lumen = super.callPackage ../packages/lumen { };
  emacsPackagesFor = emacs: (
    (super.emacsPackagesFor emacs).overrideScope' (
      eself: esuper:
        esuper // {
          tabnine-capf = super.callPackage ../packages/tabnine-capf.nix {
            inherit eself;
          };
        }
    )
  );
}