Since the time of writing sddm get a new release in debian and some
dependencies are improved - second there are now some native debian sddm
theme packages.
So task-lxqt-desktop should be changed that way:
> diff --git a/debian/control b/debian/control
> index ef6a0a48..0d1faab2 100644
> --- a/debian/control
> +++ b/debian/control
> @@ -187,14 +187,13 @@ Description: LXQt
> expect to have available on the desktop.
> Depends: ${misc:Depends},
> task-desktop,
> - sddm,
> - sddm-theme-maui | sddm-theme,
> + sddm-theme-debian-maui | sddm-theme,
> lxqt,
> Recommends: xsane,
> # orca works with qt, adding accessibility
> gnome-orca,
> # libreoffice widgets using just gtk
> - libreoffice-gtk2,
> + libreoffice-gtk3,
> # Package management.
> synaptic,
> # firefox (ne iceweasel) is the most popular web browser at the moment,
