installing nib

gistfile1.txt

//first, require nib in the beginning of the file. note that requiring stylus was needed due to the second code change below:
, nib = require('nib')
, stylus = require('stylus');

//second change:
app.use(stylus.middleware({ src: __dirname + '/public',
  compile: compile
}));

//third change, added the function compile:
function compile(str, path) {
  return stylus(str)
    .set('filename', path)
    .set('compress', true)
    .use(nib());
}