Theme selection did not apply on the first boot

[jpnurmi]

I selected the dark theme during installation but the target system has the light theme.

[jpnurmi]

jpnurmi@jpnurmi-Surface-Laptop-4:~$ cat /usr/share/glib-2.0/schemas/20_ubuntu-desktop-installer-interface.gschema.override 
[org.gnome.desktop.interface:ubuntu]
color-scheme='prefer-dark'
gtk-theme='Yaru-dark'
jpnurmi@jpnurmi-Surface-Laptop-4:~$ gsettings get org.gnome.desktop.interface gtk-theme
'Yaru-dark'
jpnurmi@jpnurmi-Surface-Laptop-4:~$ gsettings get org.gnome.desktop.interface color-scheme
'prefer-dark'

[jpnurmi]

Theme was correctly applied after logout & login, without changing any settings.

[jpnurmi]

installer-journal.txt:Mar 20 17:15:28 ubuntu subiquity_log.2703[14653]: glib-compile-schemas: symbol lookup error: glib-compile-schemas: undefined symbol: g_string_free_and_steal