Doesn't build with Flatpak 1.13.1
../../../../../../../../../Projects/gnome-software/plugins/flatpak/gs-plugin-flatpak.c:786:13: error: implicit declaration of function ‘flatpak_transaction_get_no_interaction’; did you mean ‘flatpak_transaction_set_no_interaction’? [-Werror=implicit-function-declaration]
I see there's a workaround for Flatpak <1.13.0, but apparently it's still needed in 1.13.1.