This seems like a good idea in general and will at least make it easier
to get screen sharing to work (but still requires a proper NixOS
configuration including xdg-desktop-portal-wlr).
Note: It isn't necessary to set XDG_SESSION_TYPE=wayland as wlroots
already takes care of it (currently at least for the logind and libseat
session backends, the next wlroots release will require libseat):
4839664a92/backend/session/session.c (L80)
9716bb8944