wtf, nix is magic

I just installed NixOS and entered this into my /etc/nixos/configuration.nix:

services.xserver.enable = true;
services.xserver.windowManager.dwm.enable = true;

and then I ran nixos-rebuild switch followed by systemctl start display-manager and now I have dwm running?

No need to manually install xorg-server, dwm and friends, fiddling to run startx on boot while making sure keyboard mappings are correct?¹

wtf, nix is magic