This is a tad irrelevant now but the reason flatpak couldn't be installed is
because in that PPA it's not available for Ubuntu trusty (upon which Trisquel
7 is based)
- Re: [Trisquel-users] Flatpak on Trisquel 7 andre
- Re: [Trisquel-users] Flatpak on Trisquel 7 davesamcdxv
- Re: [Trisquel-users] Flatpak on Trisquel 7 tegskywalker