Sometimes ebuild using gnome-meson.eclass might need to pass additional arguments to ninja. It would be more convenient if it was possible to do: src_compile() { gnome-meson_src_compile some_argument } Instead of checking what gnome-meson_src_compile() is internally doing and reimplementing it in ebuild.
Created attachment 554704 [details, diff] Patch for gnome repository
We don't really use this iteration of gnome-meson.eclass anymore, and just using "inherit gnome.org gnome2-utils meson xdg" for the time being. But yes, old ebuilds in overlay, that haven't been put in main tree yet, still do use it.
The fix is to not use gnome-meson.eclass.