flatpak remote-add --if-not-exists gnome https://sdk.gnome.org/gnome.flatpakrepo flatpak install gnome org.gnome.Sdk//3.24 flatpak install gnome org.gnome.Platform//3.24 flatpak install gnome org.gnome.Sdk//3.26 flatpak install gnome org.gnome.Platform//3.26 flatpak install gnome org.freedesktop.Sdk//1.6 flatpak install gnome org.freedesktop.Platform//1.6 flatpak-builder --force-clean --repo=repo local [app-id].json flatpak --user remote-add --no-gpg-verify --if-not-exists local repo flatpak --user install local [app-id] flatpak run [app-id] flatpak --user uninstall [app-id] flatpak --user remote-delete local