check which binary is used with

which context

and correct our PATH according to your needs.
you can always add more C-c C-c commands for multiple installations (beta, current, texlive ..) as I wrote before.
just change the command to 

cd (path to textree) && setuptex && context etc...

Michael


> On 29 Oct 2016, at 09:55, Fabrice Couvreur <fabrice1.couvreur@gmail.com> wrote:
> 
> Hi,
> If I add this (add-to-list 'load-path "/home/fab/context/tex/texmf-linux-64/bin") in the .emacs, one C-c C-c invokes the executable texlive, not the context of standalone.
> Fabrice