meson port wrongly installs *.ui files
The UI files are consumed as gresources, so autotools had them as noinst. With the meson port, it appears this is accidentally made to install them unnecessarily. Compared to 3.32.0, 3.36.0 installs these additional files (in addition to meson not honoring LINGUAS):
/usr/share/gnome-nibbles/controls-grid.ui
/usr/share/gnome-nibbles/nibbles.css
/usr/share/gnome-nibbles/nibbles.ui
/usr/share/gnome-nibbles/player-score-box.ui
/usr/share/gnome-nibbles/preferences-dialog.ui
/usr/share/gnome-nibbles/scoreboard.ui
All of these are included as gresources, almost sure used as such as well, so there should be no install_data for them.