[NTG-context] External graphics directory

Is it possible to specify an external graphics directory either as an environment variable, or as a command line option to `context', instead of writing `\setupexternalfigures [directory=../../foo]'? I tried the environment variable setting TEXINPUTS=../../foo:: as in http://www.tex.ac.uk/FAQ-graphicspath.html, and the command line option --path=../../foo for `context', but neither works in my Linux environment. I would like to avoid cluttering ConTeXt files with system paths. Thanks and regards, Raghu. -- N. Raghavendra , http://www.retrotexts.net/ Harish-Chandra Research Institute, http://www.hri.res.in/