I'm running WebStorm 8 on Ubuntu 14.04.
Node is installed using nvm.
My Node path is /home/alex/.nvm/v0.10.29/bin/node (running which node from WS Terminal).
The WS Node interpreter is set up for this path.
Running lessc from the WS Terminal works fine.
When using the lessc compiler configured in WS File Watchers (/home/alex/code/myproject/node_modules/less/bin/lessc), I get the following error in the run window:
/home/alex/code/myproject/node_modules/less/bin/lessc --no-color main.less
/usr/bin/env: node: No such file or directory