
The main use of the --dist flag is as a fallback when the CI dist job doesn't work for some reason. The gnome-shell tarball now needs the --include-subprojects flag, and it doesn't hurt for mutter/gnome-shell-extensions, so just add it when --dist is specified. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3164>