bug: hypridle service skipped because of an unmet condition

[Anomalocaridid]

Are you following the right branch?

• My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• I have searched the existing issues

Issue description

I recently updated my NixOS setup and switched from the hypridle flake module to the one in Home Manager. I noticed that hypridle does not do anything when I try to lock my session with loginctl lock-session. I checked the status of the systemd service with systemctl --user status hypridle.service and got the following output:

○ hypridle.service - hypridle
     Loaded: loaded (/home/anomalocaris/.config/systemd/user/hypridle.service; enabled; preset: enabled)
     Active: inactive (dead)
  Condition: start condition unmet at Tue 2024-05-14 23:10:00 EDT; 5min ago
             └─ ConditionEnvironment=WAYLAND_DISPLAY was not met

May 14 23:10:00 home-pc systemd[3088]: hypridle was skipped because of an unmet condition check (ConditionEnvironment=WAYLAND_DISPLAY).

I am using Hyprland on NixOS unstable. When I manually run systemctl --user start hypridle.service, hypridle works as expected.

Maintainer CC

@khaneliman
@fufexan

System information

- system: `"x86_64-linux"`
 - host os: `Linux 6.8.9-xanmod1, NixOS, 24.05 (Uakari), 24.05pre-git`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.22.0`
 - nixpkgs: `/nix/store/vsbi6gfwf2bdamw0d0d9xndb1rrxfnbk-source`

[khaneliman]

WAYLAND_DISPLAY should be set by Hyprland in a graphical session. Are you using the hyprland home-manager module, as well? I believe we do some stuff with passing along the WAYLAND_DISPLAY variable in

home-manager/modules/services/window-managers/hyprland.nix

Lines 67 to 80 in 44677a1

	systemd = {
	enable = lib.mkEnableOption null // {
	default = true;
	description = ''
	Whether to enable {file}`hyprland-session.target` on
	hyprland startup. This links to `graphical-session.target`.
	Some important environment variables will be imported to systemd
	and D-Bus user environment before reaching the target, including
	- `DISPLAY`
	- `HYPRLAND_INSTANCE_SIGNATURE`
	- `WAYLAND_DISPLAY`
	- `XDG_CURRENT_DESKTOP`
	'';
	};

[Anomalocaridid]

I am using the hyprland home-manager module. However I realized that this is probably not a bug with home-manager. Rather I think it's probably this PR I am using: NixOS/nixpkgs#297434. It apparently causes issues with services that rely on graphical-session.target.

Sorry for missing that.