App launching under Hyprland v0.55

[anarion80]

Hello.

I have migrated by NixOS + Hyprland + Caelestia setup to latest versions, including lua-based config of Hyprland.
I solved most of the issues, updated keymaps, etc. but there is one thing I cannot solve:

Some apps do not start from the launcher anymore - especially Steam and Davinci Resolve. They start fine from shell cli, they start fine when caelestia is started from shell cli and not by hyprland. There is no obvious error anywhere.
Most of other apps (terminal or not) start fine.

I suspect this is related to how Hyprland starts now, this is my exec section:

local home = os.getenv("HOME")
local scriptsDir = home .. "/.config/hypr/scripts"
local userScripts = home .. "/.config/hypr/UserScripts"

hl.on("hyprland.start", function()
	hl.exec_cmd("systemctl --user import-environment")
	hl.exec_cmd("dbus-update-activation-environment --systemd --all")
	hl.exec_cmd("nm-applet --indicator")
	hl.exec_cmd("blueman-applet")
	hl.exec_cmd("lxqt-policykit-agent")
	hl.exec_cmd("mpris-proxy")
	hl.exec_cmd("trash-empty 30")
	hl.exec_cmd("wl-clip-persist --clipboard both")
	hl.exec_cmd("wl-paste --watch cliphist store")
	hl.exec_cmd("easyeffects -w")
	hl.exec_cmd("sunshine")
	hl.exec_cmd(userScripts .. "/RainbowBorders.sh")
	hl.exec_cmd("hypridle")
	hl.exec_cmd("caelestia resizer -d")
	hl.exec_cmd("caelestia-shell -d")
	hl.exec_cmd("caelestia wallpaper --random")
	hl.exec_cmd("streamcontroller -b")
	hl.exec_cmd("franz", { workspace = "special:communication" })
end)

But I can't get it to work by changing the env vars, etc.
I also tried changing how caelestia executes those apps, from:

command: ["app2unit", "--", ...entry.command],

to gtk-launch or event entry.command directly, but that did not help...

Does anyone have any idea what to try or how to fix this?