Changes

Normaly you do not want to allow access in e.g. /opt. but you like to allow it in /var/cache/*. So create Change the needed cache directory so ConTeXt can create temporary files as a superuser viafollows:

mkdir /var/cache/context mkdir -p /var/cache/context/texmf-cache

Change the value of `TEXMFCACHE` in the file `./tex/texmf/web2c/texmfcnf.lua the value of TEXMFCACHE ` to the directory you want (in this example :  /var/cache/context/texmf-cache).