flatpak-builder/profile/flatpak.sh.in

# @sysconfdir@/profile.d/flatpak.sh - set XDG_DATA_DIRS

XDG_DATA_DIRS="${XDG_DATA_DIRS:-$HOME/.local/share/xdg-app/exports/share:@localstatedir@/xdg-app/exports/share/:/usr/local/share/:/usr/share/}"
export XDG_DATA_DIRS