Re: [Trisquel-users] Installing GNOME 3.12?

[forna]

I think the best way is to upgrade to Trisquel 7 (once it's ready, or if you  
are brave enough) and add a PPA (GNOME testing/staging PPA, etc.).
Using PPA is risky because it may contain proprietary sotware and unstable  
software. If you want to use it anyway, I strongly recommend you to install  
also the "ppa-purge" tool.