User TeX Live 2013 repository when 2014 is the default

I've tried to install a TeX package and got the error message:

tlmgr: The TeX Live versions supported by the repository
do not include the version of the local installation

The recommended solution is to install TeX Live 2014, but at the moment I have no time to upgrade. Therefore, I've found a TeX Live archive and the command line to switch to it:

tlmgr option repository \
Categories: linux TeX