TL;DR How to enable screen sharing on Sway/Wayland using Guix
This week I got tired enough, of not being able to share my screen on sway/wayland, that I decided to fix it. Here’s some of what worked; You probably don’t need all of this, but it generally improves your wayland experience.
(1) Include this in your sway config:
exec systemctl --user import-environment WAYLAND_DISPLAY XDG_CURRENT_DESKTOP
exec dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP=sway
(2) Make sure these packages are installed:
xdg-desktop-portal-wlrxdg-desktop-portal-gtk(probably not necessary)slurp: helper to select the screen to share
(3) Create portals.conf config:
[preferred]
# use xdg-desktop-portal-gtk for every portal interface
default=gtk
# Settings portal for theme detection
org.freedesktop.impl.portal.Settings=gtk
# except for the xdg-desktop-portal-wlr supplied interfaces
org.freedesktop.impl.portal.ScreenCast=wlr
org.freedesktop.impl.portal.Screenshot=wlr
(4) Tie it all together, using guix home (or manually):
(services
(append (list
;; other services
(service home-xdg-configuration-files-service-type
`(("sway/config" ,(local-file "sway"))
("xdg-desktop-portal/portals.conf" ,(local-file "portals.conf"))))
(simple-service 'env-vars home-environment-variables-service-type
`(("QT_QPA_PLATFORM" . "wayland;xcb")
("SDL_VIDEODRIVER" . "wayland")
("XDG_CURRENT_DESKTOP" . "sway")
("XDG_SESSION_DESKTOP" . "sway")
("XDG_SESSION_TYPE" . "wayland")
("ELECTRON_OZONE_PLATFORM_HINT" . "wayland")
("MOZ_ENABLE_WAYLAND" . "1")
("NIXOS_OZONE_WL" . "1")
("GDK_BACKEND" . "wayland")
("CLUTTER_BACKEND" . "wayland")))
(service home-dbus-service-type)
(service home-pipewire-service-type))
%base-home-services))
To test if it’s working, use this Test Page.
Feel free to checkout my dotfiles for more details.