whitelist.nix

{ lib, pkgs }:

with lib;

{
  environment.gnome3.excludePackages =
    let
      pkgName = drv: (builtins.parseDrvName drv.name).name;
      blacklist = pkgs.gnome3.optionalPackages;
      whitelist = with pkgs.gnome3; [ totem ];
      whitelistPkgNames = map pkgName whitelist;
    in filter (drv: !(elem (pkgName drv) whitelistPkgNames)) blacklist;
}