Root on gentoo problem

Hello @amadio
To run root by gentoo, I do this

/cvmfs/sft.cern.ch/lcg/contrib/gentoo/linux/x86_64/startprefix
root

yuo said me this command here

and it worked up to few weeks ago…but now, it doesn’t work!

Anyway, I just need a Root on cvmf (so I don’t need to download the root file generated by Geant4) is there other way to lunch ROOT on cvmf?