In reply to @nehu:matrix.org

Could someone tell me how to update to a newer channel and get more up-to-date packages than from 22.05?

In a fresh installation, I did the following:

sudo nixos-rebuild switch
sudo nixos-channel --add https://nixos.org/channels/nixos-22.11 nixos
sudo nixos-channel --update
sudo nixos-rebuild switch

The second rebuild outputs errors:

activating the configuration...
Copying /usr/share/applications
Copying /usr/share/icons
rsync: [sender] change_dir "/nix/store/i2cy643r2znpj8bji5f67z3nyb8mwws9-nixos-system-nixos-22.11.3667.87edbd74246/sw/share/icons" failed: No such file or directory (2)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1327) [sender=3.2.6]
Activation script snippet 'copy-launchers' failed (23)
setting up /etc...
setting up /bin...
restarting systemd...
reloading user units for nixos...
setting up tmpfiles
reloading the following units: dbus.service
restarting the following units: nix-daemon.service, systemd-journald.service
starting the following units: logrotate-checkconf.service, network-local-commands.service, nscd.service, systemd-machined.service, systemd-sysctl.service, systemd-tmpfiles-setup-dev.service, systemd-update-done.service
the following new units were started: systemd-oomd.socket
warning: error(s) occurred while switching to the new configuration

and after that, I can't enter WSL anymore...

Can you still get a shell? If not, try the following:

wsl -d NixOS -e /bin/sh -c '/nix/var/nix/profiles/system/activate; source /etc/set-environment; bash -l'

From there you can edit the configuration and rebuild with nixos-rebuild boot (switch won't work). Then run wsl -t NixOS and try starting it again

In reply to@nzbr:nzbr.de
I want to do some cleanup first. And I want to make syschdemd use more of the native systemd code, so it hopefully needs less extra maintenance. Microsofts recent patches make me even more reluctant to drop it; it seems we can't trust them to not spontaneously brick the systemd shim