netbeans - 'node' is not recognized as an internal or external command

I would like to use CSS preprocessor (less) in my project so I installed node.js and less ("npm install -g less"). In netbeans I pointed out the path to the file lessc.cmd and the problem now is that when compiling I get the message

'node' is not recognized as an internal or external command, operable program or batch file.

What to do with that?