I do it declaratively, however I specifically use an unstraightened version. [[https://github.com/marienz/nix-doom-emacs-unstraightened][marienz/nix-doom-emacs-unstraightened: Builds Doom Emacs using Nix]]

I use a doom emacs overlay that uses pgtk so it works flawlessly on wayland, since I only learned recently that it uses X by default. You can inspect my dotfiles here: [[https://github.com/ArikRahman/dotfiles][ArikRahman/dotfiles: Arik's Dotfiles]]